Fix CSV export in some locales; bump version to 1.7.11 (38)

Closes #395

.gitignore

@@ -20,3 +20,6 @@ captures/
 docs/
 gen/
 local.properties
+crowdin.yaml
+local
+secret/

CHANGELOG.md

@@ -1,5 +1,62 @@
 # Changelog
 
+### 1.7.11 (Aug 10, 2019)
+
+* Fix bug that produced corrupted CSV files in some countries
+
+### 1.7.10 (June 15, 2019)
+
+* Fix bug that prevented some devices from showing notifications.
+* Update targetSdk to Android Pie (API level 28)
+
+### 1.7.8 (April 21, 2018)
+
+* Add support for adaptive icons (Oreo)
+* Add support for notification channels (Oreo)
+* Update translations
+
+### 1.7.7 (September 30, 2017)
+
+* Fix bug that caused reminders to show repeatedly on DST changes
+
+### 1.7.6 (July 18, 2017)
+
+* Fix bug that caused widgets not to render sometimes
+* Fix other minor bugs
+* Update translations
+
+### 1.7.3 (May 30, 2017)
+
+* Improve performance of 'sort by score'
+* Other minor bug fixes
+
+### 1.7.2 (May 27, 2017)
+
+* Fix crash at startup
+
+### 1.7.1 (May 21, 2017)
+
+* Fix crash (BadParcelableException)
+* Fix layout for RTL languages such as Arabic
+* Automatically detect and reject invalid database files
+* Add Hebrew translation
+
+### 1.7.0 (Mar 31, 2017)
+
+* Sort habits automatically
+* Allow swiping the header to see previous days
+* Import backups directly from Google Drive or Dropbox
+* Refresh data automatically at midnight
+* Other minor bug fixes and enhancements
+
+### 1.6.2 (Oct 13, 2016)
+
+* Fix crash on Android 4.1
+
+### 1.6.1 (Oct 10, 2016)
+
+* Fix a crash at startup when database is corrupted
+
 ### 1.6.0 (Oct 10, 2016)
 
 * Add option to make notifications sticky

app/build.gradle

@@ -2,30 +2,50 @@ apply plugin: 'com.android.application'
 apply plugin: 'com.neenbedankt.android-apt'
 apply plugin: 'me.tatarka.retrolambda'
 apply plugin: 'jacoco'
+apply plugin: 'com.github.triplet.play'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
+
+//    signingConfigs {
+//        release {
+//            storeFile file(LOOP_STORE_FILE)
+//            storePassword LOOP_STORE_PASSWORD
+//            keyAlias LOOP_KEY_ALIAS
+//            keyPassword LOOP_KEY_PASSWORD
+//        }
+//    }
+
+    playAccountConfigs {
+        defaultAccountConfig {
+            jsonFile = file('../secret/playstore.json')
+        }
+    }
+
 
     defaultConfig {
         applicationId "org.isoron.uhabits"
         minSdkVersion 15
-        targetSdkVersion 23
+        targetSdkVersion 28
 
-        buildConfigField "Integer", "databaseVersion", "14"
+        buildConfigField "Integer", "databaseVersion", "15"
         buildConfigField "String", "databaseFilename", "\"uhabits.db\""
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         testInstrumentationRunnerArgument "size", "medium"
+
+//        playAccountConfig = playAccountConfigs.defaultAccountConfig
     }
 
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+//            signingConfig signingConfigs.release
         }
         debug {
-            testCoverageEnabled = true
+            testCoverageEnabled = false
         }
     }
 
@@ -53,7 +73,7 @@ dependencies {
 
     androidTestApt 'com.google.dagger:dagger-compiler:2.2'
 
-    androidTestCompile 'com.android.support:support-annotations:23.3.0'
+    androidTestCompile 'com.android.support:support-annotations:27.1.1'
     androidTestCompile 'com.android.support.test:rules:0.5'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.google.auto.factory:auto-factory:1.0-beta3'
@@ -64,16 +84,15 @@ dependencies {
     apt 'com.google.dagger:dagger-compiler:2.2'
     apt 'com.jakewharton:butterknife-compiler:8.0.1'
 
-    compile 'com.android.support:appcompat-v7:23.3.0'
-    compile 'com.android.support:design:23.3.0'
-    compile 'com.android.support:preference-v14:23.3.0'
-    compile 'com.android.support:support-v4:23.3.0'
+    compile 'com.android.support:appcompat-v7:27.1.1'
+    compile 'com.android.support:design:27.1.1'
+    compile 'com.android.support:preference-v14:27.1.1'
+    compile 'com.android.support:support-v4:27.1.1'
     compile 'com.getpebble:pebblekit:3.0.0'
     compile 'com.github.paolorotolo:appintro:3.4.0'
     compile 'com.google.auto.factory:auto-factory:1.0-beta3'
     compile 'com.google.dagger:dagger:2.2'
     compile 'com.jakewharton:butterknife:8.0.1'
-    compile 'com.michaelpardo:activeandroid:3.1.0-SNAPSHOT'
     compile 'com.opencsv:opencsv:3.7'
     compile 'org.apmem.tools:layouts:1.10@aar'
     compile 'org.jetbrains:annotations-java5:15.0'
@@ -140,3 +159,7 @@ task coverageReport(type: JacocoReport, dependsOn: ['testDebugUnitTest']) {
     classDirectories = files(fileTree(dir: classDir, excludes: excludes))
     executionData = files(jvmExecData, connectedExecData)
 }
+
+//play {
+//    track = 'alpha'
+//}

app/src/androidTest/java/org/isoron/uhabits/BaseAndroidTest.java

@@ -24,6 +24,7 @@ import android.content.*;
 import android.os.*;
 import android.support.annotation.*;
 import android.support.test.*;
+import android.util.*;
 
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.preferences.*;
@@ -31,6 +32,7 @@ import org.isoron.uhabits.tasks.*;
 import org.isoron.uhabits.utils.*;
 import org.junit.*;
 
+import java.io.*;
 import java.util.*;
 import java.util.concurrent.*;
 
@@ -63,6 +65,10 @@ public class BaseAndroidTest
 
     protected AndroidTestComponent component;
 
+    protected ModelFactory modelFactory;
+
+    private boolean isDone = false;
+
     @Before
     public void setUp()
     {
@@ -89,7 +95,7 @@ public class BaseAndroidTest
         taskRunner = component.getTaskRunner();
         logger = component.getHabitsLogger();
 
-        ModelFactory modelFactory = component.getModelFactory();
+        modelFactory = component.getModelFactory();
         fixtures = new HabitFixtures(modelFactory, habitList);
 
         latch = new CountDownLatch(1);
@@ -113,6 +119,25 @@ public class BaseAndroidTest
         assertTrue(latch.await(60, TimeUnit.SECONDS));
     }
 
+    protected void runConcurrently(Runnable... runnableList) throws Exception
+    {
+        isDone = false;
+        ExecutorService executor = Executors.newFixedThreadPool(100);
+        List<Future> futures = new LinkedList<>();
+        for (Runnable r : runnableList)
+            futures.add(executor.submit(() ->
+            {
+                while (!isDone) r.run();
+                return null;
+            }));
+
+        Thread.sleep(3000);
+        isDone = true;
+        executor.shutdown();
+        for(Future f : futures) f.get();
+        while (!executor.isTerminated()) Thread.sleep(50);
+    }
+
     protected void setTheme(@StyleRes int themeId)
     {
         targetContext.setTheme(themeId);
@@ -130,4 +155,18 @@ public class BaseAndroidTest
             fail();
         }
     }
+
+    protected void startTracing()
+    {
+        File dir = FileUtils.getFilesDir(targetContext, "Profile");
+        assertNotNull(dir);
+        String tracePath = dir.getAbsolutePath() + "/performance.trace";
+        Log.d("PerformanceTest", String.format("Saving trace file to %s", tracePath));
+        Debug.startMethodTracingSampling(tracePath, 0, 1000);
+    }
+
+    protected void stopTracing()
+    {
+        Debug.stopMethodTracing();
+    }
 }

app/src/androidTest/java/org/isoron/uhabits/BaseViewTest.java

@@ -225,7 +225,7 @@ public class BaseViewTest extends BaseAndroidTest
         throws IOException
     {
         File dir = FileUtils.getSDCardDir("test-screenshots");
-        if (dir == null) dir = FileUtils.getFilesDir("test-screenshots");
+        if (dir == null) dir = FileUtils.getFilesDir(targetContext,"test-screenshots");
         if (dir == null) throw new RuntimeException(
             "Could not find suitable dir for screenshots");
 

app/src/androidTest/java/org/isoron/uhabits/HabitFixtures.java

@@ -39,12 +39,18 @@ public class HabitFixtures
     }
 
     public Habit createEmptyHabit()
+    {
+        return createEmptyHabit(null);
+    }
+
+    public Habit createEmptyHabit(Long id)
     {
         Habit habit = modelFactory.buildHabit();
         habit.setName("Meditate");
         habit.setDescription("Did you meditate this morning?");
         habit.setColor(3);
         habit.setFrequency(Frequency.DAILY);
+        habit.setId(id);
         habitList.add(habit);
         return habit;
     }

app/src/androidTest/java/org/isoron/uhabits/activities/habits/list/views/CheckmarkButtonViewTest.java

@@ -46,12 +46,12 @@ public class CheckmarkButtonViewTest extends BaseViewTest
     public void setUp()
     {
         super.setUp();
-        setSimilarityCutoff(0.03f);
+        setSimilarityCutoff(0.015f);
 
         latch = new CountDownLatch(1);
         view = new CheckmarkButtonView(targetContext);
         view.setValue(Checkmark.UNCHECKED);
-        view.setColor(ColorUtils.getAndroidTestColor(7));
+        view.setColor(ColorUtils.getAndroidTestColor(5));
 
         measureView(view, dpToPixels(40), dpToPixels(40));
     }

app/src/androidTest/java/org/isoron/uhabits/activities/habits/list/views/CheckmarkPanelViewTest.java

@@ -60,6 +60,7 @@ public class CheckmarkPanelViewTest extends BaseViewTest
         view = new CheckmarkPanelView(targetContext);
         view.setHabit(habit);
         view.setCheckmarkValues(checkmarks);
+        view.setButtonCount(4);
         view.setColor(ColorUtils.getAndroidTestColor(7));
 
         measureView(view, dpToPixels(200), dpToPixels(200));

app/src/androidTest/java/org/isoron/uhabits/espresso/MainTest.java

@@ -171,13 +171,13 @@ public class MainTest
         clickMenuItem(R.string.archive);
         assertHabitsDontExist(names);
 
-        clickMenuItem(R.string.show_archived);
+        clickMenuItem(R.string.hide_archived);
 
         assertHabitsExist(names);
         selectHabits(names);
         clickMenuItem(R.string.unarchive);
 
-        clickMenuItem(R.string.show_archived);
+        clickMenuItem(R.string.hide_archived);
 
         assertHabitsExist(names);
         deleteHabits(names);

app/src/androidTest/java/org/isoron/uhabits/io/ImportTest.java

@@ -40,8 +40,6 @@ import static org.junit.Assert.*;
 @MediumTest
 public class ImportTest extends BaseAndroidTest
 {
-    private File baseDir;
-
     private Context context;
 
     @Override
@@ -50,11 +48,8 @@ public class ImportTest extends BaseAndroidTest
     {
         super.setUp();
         DateUtils.setFixedLocalTime(null);
-
         fixtures.purgeHabits(habitList);
         context = InstrumentationRegistry.getInstrumentation().getContext();
-        baseDir = FileUtils.getFilesDir("Backups");
-        if (baseDir == null) fail("baseDir should not be null");
     }
 
     @Test
@@ -149,8 +144,7 @@ public class ImportTest extends BaseAndroidTest
 
     private void importFromFile(String assetFilename) throws IOException
     {
-        File file =
-            new File(String.format("%s/%s", baseDir.getPath(), assetFilename));
+        File file = File.createTempFile("asset", "");
         copyAssetToFile(assetFilename, file);
         assertTrue(file.exists());
         assertTrue(file.canRead());
@@ -159,5 +153,7 @@ public class ImportTest extends BaseAndroidTest
         assertThat(importer.canHandle(file), is(true));
 
         importer.importHabitsFromFile(file);
+
+        file.delete();
     }
 }

app/src/androidTest/java/org/isoron/uhabits/models/HabitListTest.java

@@ -0,0 +1,240 @@
+/*
+ * Copyright (C) 2016 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.models;
+
+import android.support.test.runner.*;
+import android.test.suitebuilder.annotation.*;
+
+import org.hamcrest.*;
+import org.isoron.uhabits.*;
+import org.junit.*;
+import org.junit.runner.*;
+
+import java.io.*;
+import java.util.*;
+
+import static junit.framework.Assert.*;
+import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.*;
+import static org.hamcrest.core.IsEqual.equalTo;
+import static org.isoron.uhabits.models.HabitList.Order.*;
+
+@SuppressWarnings("JavaDoc")
+@RunWith(AndroidJUnit4.class)
+@MediumTest
+public class HabitListTest extends BaseAndroidTest
+{
+    private ArrayList<Habit> habitsArray;
+
+    private HabitList activeHabits;
+
+    private HabitList reminderHabits;
+
+    @Override
+    public void setUp()
+    {
+        super.setUp();
+        habitList.removeAll();
+
+        habitsArray = new ArrayList<>();
+
+        for (int i = 0; i < 10; i++)
+        {
+            Habit habit = fixtures.createEmptyHabit((long) i);
+            habitsArray.add(habit);
+
+            if (i % 3 == 0)
+                habit.setReminder(new Reminder(8, 30, WeekdayList.EVERY_DAY));
+
+            habitList.update(habit);
+        }
+
+        habitsArray.get(0).setArchived(true);
+        habitsArray.get(1).setArchived(true);
+        habitsArray.get(4).setArchived(true);
+        habitsArray.get(7).setArchived(true);
+
+        activeHabits = habitList.getFiltered(new HabitMatcherBuilder().build());
+
+        reminderHabits = habitList.getFiltered(new HabitMatcherBuilder()
+            .setArchivedAllowed(true)
+            .setReminderRequired(true)
+            .build());
+    }
+
+    @Test
+    public void test_size()
+    {
+        assertThat(habitList.size(), equalTo(10));
+    }
+
+    @Test
+    public void test_countActive()
+    {
+        assertThat(activeHabits.size(), equalTo(6));
+    }
+
+    @Test
+    public void test_getByPosition()
+    {
+        assertThat(habitList.getByPosition(0), equalTo(habitsArray.get(0)));
+        assertThat(habitList.getByPosition(3), equalTo(habitsArray.get(3)));
+        assertThat(habitList.getByPosition(9), equalTo(habitsArray.get(9)));
+
+        assertThat(activeHabits.getByPosition(0), equalTo(habitsArray.get(2)));
+    }
+
+    @Test
+    public void test_getHabitsWithReminder()
+    {
+        assertThat(reminderHabits.size(), equalTo(4));
+        assertThat(reminderHabits.getByPosition(1),
+            equalTo(habitsArray.get(3)));
+    }
+
+    @Test
+    public void test_get_withInvalidId()
+    {
+        assertThat(habitList.getById(100L), is(nullValue()));
+    }
+
+    @Test
+    public void test_get_withValidId()
+    {
+        Habit habit1 = habitsArray.get(0);
+        Habit habit2 = habitList.getById(habit1.getId());
+        assertThat(habit1, equalTo(habit2));
+    }
+
+    @Test
+    public void test_reorder()
+    {
+        int operations[][] = {
+            { 5, 2 }, { 3, 7 }, { 4, 4 }, { 3, 2 }
+        };
+
+        int expectedPosition[][] = {
+            { 0, 1, 3, 4, 5, 2, 6, 7, 8, 9 },
+            { 0, 1, 7, 3, 4, 2, 5, 6, 8, 9 },
+            { 0, 1, 7, 3, 4, 2, 5, 6, 8, 9 },
+            { 0, 1, 7, 2, 4, 3, 5, 6, 8, 9 },
+        };
+
+        for (int i = 0; i < operations.length; i++)
+        {
+            int from = operations[i][0];
+            int to = operations[i][1];
+
+            Habit fromHabit = habitList.getByPosition(from);
+            Habit toHabit = habitList.getByPosition(to);
+            habitList.reorder(fromHabit, toHabit);
+
+            int actualPositions[] = new int[10];
+
+            for (int j = 0; j < 10; j++)
+            {
+                Habit h = habitList.getById(j);
+                assertNotNull(h);
+                actualPositions[j] = habitList.indexOf(h);
+            }
+
+            assertThat(actualPositions, equalTo(expectedPosition[i]));
+        }
+    }
+
+    @Test
+    public void test_writeCSV() throws IOException
+    {
+        habitList.removeAll();
+
+        Habit h1 = fixtures.createEmptyHabit();
+        h1.setName("Meditate");
+        h1.setDescription("Did you meditate this morning?");
+        h1.setFrequency(Frequency.DAILY);
+        h1.setColor(3);
+
+        Habit h2 = fixtures.createEmptyHabit();
+        h2.setName("Wake up early");
+        h2.setDescription("Did you wake up before 6am?");
+        h2.setFrequency(new Frequency(2, 3));
+        h2.setColor(5);
+
+        habitList.update(h1);
+        habitList.update(h2);
+
+        String expectedCSV =
+            "Position,Name,Description,NumRepetitions,Interval,Color\n" +
+            "001,Meditate,Did you meditate this morning?,1,1,#AFB42B\n" +
+            "002,Wake up early,Did you wake up before 6am?,2,3,#00897B\n";
+
+        StringWriter writer = new StringWriter();
+        habitList.writeCSV(writer);
+
+        MatcherAssert.assertThat(writer.toString(), equalTo(expectedCSV));
+    }
+
+    @Test
+    public void test_ordering()
+    {
+        habitList.removeAll();
+
+        Habit h3 = fixtures.createEmptyHabit();
+        h3.setName("C Habit");
+        h3.setColor(0);
+        habitList.update(h3);
+
+        Habit h1 = fixtures.createEmptyHabit();
+        h1.setName("A Habit");
+        h1.setColor(2);
+        habitList.update(h1);
+
+        Habit h4 = fixtures.createEmptyHabit();
+        h4.setName("D Habit");
+        h4.setColor(1);
+        habitList.update(h4);
+
+        Habit h2 = fixtures.createEmptyHabit();
+        h2.setName("B Habit");
+        h2.setColor(2);
+        habitList.update(h2);
+
+        habitList.setOrder(BY_POSITION);
+        assertThat(habitList.getByPosition(0), equalTo(h3));
+        assertThat(habitList.getByPosition(1), equalTo(h1));
+        assertThat(habitList.getByPosition(2), equalTo(h4));
+        assertThat(habitList.getByPosition(3), equalTo(h2));
+
+        habitList.setOrder(BY_NAME);
+        assertThat(habitList.getByPosition(0), equalTo(h1));
+        assertThat(habitList.getByPosition(1), equalTo(h2));
+        assertThat(habitList.getByPosition(2), equalTo(h3));
+        assertThat(habitList.getByPosition(3), equalTo(h4));
+
+        habitList.remove(h1);
+        habitList.add(h1);
+        assertThat(habitList.getByPosition(0), equalTo(h1));
+
+        habitList.setOrder(BY_COLOR);
+        assertThat(habitList.getByPosition(0), equalTo(h3));
+        assertThat(habitList.getByPosition(1), equalTo(h4));
+        assertThat(habitList.getByPosition(2), equalTo(h1));
+        assertThat(habitList.getByPosition(3), equalTo(h2));
+    }
+}

app/src/androidTest/java/org/isoron/uhabits/models/sqlite/SQLiteCheckmarkListTest.java

@@ -115,6 +115,41 @@ public class SQLiteCheckmarkListTest extends BaseAndroidTest
         assertThat(records.get(0).timestamp, equalTo(today - 21 * day));
     }
 
+    @Test
+    public void testFixRecords() throws Exception
+    {
+        long day = DateUtils.millisecondsInOneDay;
+        long from = DateUtils.getStartOfToday();
+        long to = from + 5 * day;
+
+        List<CheckmarkRecord> original, actual, expected;
+        HabitRecord habit = new HabitRecord();
+
+        original = new ArrayList<>();
+        original.add(new CheckmarkRecord(habit, from + 8*day, 2));
+        original.add(new CheckmarkRecord(habit, from + 5*day, 0));
+        original.add(new CheckmarkRecord(habit, from + 4*day, 0));
+        original.add(new CheckmarkRecord(habit, from + 4*day, 2));
+        original.add(new CheckmarkRecord(habit, from + 3*day, 2));
+        original.add(new CheckmarkRecord(habit, from + 2*day, 1));
+        original.add(new CheckmarkRecord(habit, from + 2*day + 100, 1));
+        original.add(new CheckmarkRecord(habit, from, 0));
+        original.add(new CheckmarkRecord(habit, from, 2));
+        original.add(new CheckmarkRecord(habit, from - day, 2));
+
+        actual = SQLiteCheckmarkList.fixRecords(original, habit, from, to);
+
+        expected = new ArrayList<>();
+        expected.add(new CheckmarkRecord(habit, from + 5*day, 0));
+        expected.add(new CheckmarkRecord(habit, from + 4*day, 2));
+        expected.add(new CheckmarkRecord(habit, from + 3*day, 2));
+        expected.add(new CheckmarkRecord(habit, from + 2*day, 1));
+        expected.add(new CheckmarkRecord(habit, from + day, 0));
+        expected.add(new CheckmarkRecord(habit, from, 2));
+
+        assertThat(actual, equalTo(expected));
+    }
+
     private List<CheckmarkRecord> getAllRecords()
     {
         return new Select()

app/src/androidTest/java/org/isoron/uhabits/models/sqlite/SQLiteHabitListTest.java

@@ -125,17 +125,6 @@ public class SQLiteHabitListTest extends BaseAndroidTest
         assertThat(habits.get(3).getName(), equalTo("habit 3"));
     }
 
-//    @Test
-//    public void testGetAll_withoutArchived()
-//    {
-//        List<Habit> habits = habitList.toList();
-//        assertThat(habits.size(), equalTo(5));
-//        assertThat(habits.get(3).getName(), equalTo("habit 7"));
-//
-//        List<Habit> another = habitList.toList();
-//        assertThat(habits, equalTo(another));
-//    }
-
     @Test
     public void testGetById()
     {
@@ -178,45 +167,6 @@ public class SQLiteHabitListTest extends BaseAndroidTest
         assertThat(habitList.indexOf(h2), equalTo(-1));
     }
 
-    @Test
-    public void test_reorder()
-    {
-        // Same as HabitListTest.java
-        // TODO: remove duplication
-
-        int operations[][] = {
-            {5, 2}, {3, 7}, {4, 4}, {3, 2}
-        };
-
-        int expectedPosition[][] = {
-            {0, 1, 3, 4, 5, 2, 6, 7, 8, 9},
-            {0, 1, 7, 3, 4, 2, 5, 6, 8, 9},
-            {0, 1, 7, 3, 4, 2, 5, 6, 8, 9},
-            {0, 1, 7, 2, 4, 3, 5, 6, 8, 9},
-        };
-
-        for (int i = 0; i < operations.length; i++)
-        {
-            int from = operations[i][0];
-            int to = operations[i][1];
-
-            Habit fromHabit = habitList.getByPosition(from);
-            Habit toHabit = habitList.getByPosition(to);
-            habitList.reorder(fromHabit, toHabit);
-
-            int actualPositions[] = new int[10];
-
-            for (int j = 0; j < 10; j++)
-            {
-                Habit h = habitList.getById(j);
-                assertNotNull(h);
-                actualPositions[j] = habitList.indexOf(h);
-            }
-
-            assertThat(actualPositions, equalTo(expectedPosition[i]));
-        }
-    }
-
     private HabitRecord getRecord(long id)
     {
         return new Select()

app/src/androidTest/java/org/isoron/uhabits/models/sqlite/SQLiteScoreListTest.java

@@ -61,29 +61,6 @@ public class SQLiteScoreListTest extends BaseAndroidTest
         day = DateUtils.millisecondsInOneDay;
     }
 
-    @Test
-    public void testGetAll()
-    {
-        List<Score> list = scores.toList();
-        assertThat(list.size(), equalTo(121));
-        assertThat(list.get(0).getTimestamp(), equalTo(today));
-        assertThat(list.get(10).getTimestamp(), equalTo(today - 10 * day));
-    }
-
-    @Test
-    public void testInvalidateNewerThan()
-    {
-        scores.getTodayValue(); // force recompute
-        List<ScoreRecord> records = getAllRecords();
-        assertThat(records.size(), equalTo(121));
-
-        scores.invalidateNewerThan(today - 10 * day);
-
-        records = getAllRecords();
-        assertThat(records.size(), equalTo(110));
-        assertThat(records.get(0).timestamp, equalTo(today - 11 * day));
-    }
-
     @Test
     public void testAdd()
     {
@@ -101,6 +78,15 @@ public class SQLiteScoreListTest extends BaseAndroidTest
         assertThat(records.get(0).timestamp, equalTo(today));
     }
 
+    @Test
+    public void testGetAll()
+    {
+        List<Score> list = scores.toList();
+        assertThat(list.size(), equalTo(121));
+        assertThat(list.get(0).getTimestamp(), equalTo(today));
+        assertThat(list.get(10).getTimestamp(), equalTo(today - 10 * day));
+    }
+
     @Test
     public void testGetByInterval()
     {
@@ -115,6 +101,16 @@ public class SQLiteScoreListTest extends BaseAndroidTest
         assertThat(list.get(7).getTimestamp(), equalTo(today - 10 * day));
     }
 
+    @Test
+    public void testGetByInterval_concurrent() throws Exception
+    {
+        Runnable block1 = () -> scores.invalidateNewerThan(0);
+        Runnable block2 =
+            () -> assertThat(scores.getByInterval(today, today).size(),
+                equalTo(1));
+        runConcurrently(block1, block2);
+    }
+
     @Test
     public void testGetByInterval_withLongInterval()
     {
@@ -125,6 +121,30 @@ public class SQLiteScoreListTest extends BaseAndroidTest
         assertThat(list.size(), equalTo(201));
     }
 
+    @Test
+    public void testGetTodayValue_concurrent() throws Exception
+    {
+        Runnable block1 = () -> scores.invalidateNewerThan(0);
+        Runnable block2 =
+            () -> assertThat(scores.getTodayValue(), equalTo(18407827));
+
+        runConcurrently(block1, block2);
+    }
+
+    @Test
+    public void testInvalidateNewerThan()
+    {
+        scores.getTodayValue(); // force recompute
+        List<ScoreRecord> records = getAllRecords();
+        assertThat(records.size(), equalTo(121));
+
+        scores.invalidateNewerThan(today - 10 * day);
+
+        records = getAllRecords();
+        assertThat(records.size(), equalTo(110));
+        assertThat(records.get(0).timestamp, equalTo(today - 11 * day));
+    }
+
     private List<ScoreRecord> getAllRecords()
     {
         return new Select()

app/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2017 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.performance;
+
+import android.support.test.filters.*;
+
+import org.isoron.uhabits.*;
+import org.isoron.uhabits.models.*;
+import org.junit.*;
+
+@MediumTest
+public class PerformanceTest extends BaseAndroidTest
+{
+    private Habit habit;
+
+    @Override
+    public void setUp()
+    {
+        super.setUp();
+        habit = fixtures.createLongHabit();
+    }
+
+    @Test(timeout = 1000)
+    public void testRepeatedGetTodayValue()
+    {
+        for (int i = 0; i < 100000; i++)
+        {
+            habit.getScores().getTodayValue();
+            habit.getCheckmarks().getTodayValue();
+        }
+    }
+
+}

app/src/androidTest/java/org/isoron/uhabits/receivers/PebbleReceiverTest.java

@@ -1,173 +0,0 @@
-/*
- * Copyright (C) 2016 Álinson Santos Xavier <isoron@gmail.com>
- *
- * This file is part of Loop Habit Tracker.
- *
- * Loop Habit Tracker is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or (at your
- * option) any later version.
- *
- * Loop Habit Tracker is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.isoron.uhabits.pebble;
-
-import android.content.*;
-import android.support.annotation.*;
-import android.support.test.runner.*;
-import android.test.suitebuilder.annotation.*;
-
-import com.getpebble.android.kit.*;
-import com.getpebble.android.kit.util.*;
-
-import org.isoron.uhabits.*;
-import org.isoron.uhabits.models.*;
-import org.isoron.uhabits.receivers.*;
-import org.json.*;
-import org.junit.*;
-import org.junit.runner.*;
-
-import static com.getpebble.android.kit.Constants.*;
-import static org.hamcrest.MatcherAssert.*;
-import static org.hamcrest.core.IsEqual.*;
-
-@RunWith(AndroidJUnit4.class)
-@MediumTest
-public class PebbleReceiverTest extends BaseAndroidTest
-{
-
-    private Habit habit1;
-
-    private Habit habit2;
-
-    @Override
-    public void setUp()
-    {
-        super.setUp();
-
-        fixtures.purgeHabits(habitList);
-
-        habit1 = fixtures.createEmptyHabit();
-        habit1.setName("Exercise");
-
-        habit2 = fixtures.createEmptyHabit();
-        habit2.setName("Meditate");
-    }
-
-    @Test
-    public void testCount() throws Exception
-    {
-        onPebbleReceived((dict) -> {
-            assertThat(dict.getString(0), equalTo("COUNT"));
-            assertThat(dict.getInteger(1), equalTo(2L));
-        });
-
-        PebbleDictionary dict = buildCountRequest();
-        sendFromPebbleToAndroid(dict);
-        awaitLatch();
-    }
-
-    @Test
-    public void testFetch() throws Exception
-    {
-        onPebbleReceived((dict) -> {
-            assertThat(dict.getString(0), equalTo("HABIT"));
-            assertThat(dict.getInteger(1), equalTo(habit2.getId()));
-            assertThat(dict.getString(2), equalTo(habit2.getName()));
-            assertThat(dict.getInteger(3), equalTo(0L));
-        });
-
-        PebbleDictionary dict = buildFetchRequest(1);
-        sendFromPebbleToAndroid(dict);
-        awaitLatch();
-    }
-
-//    @Test
-//    public void testToggle() throws Exception
-//    {
-//        int v = habit1.getCheckmarks().getTodayValue();
-//        assertThat(v, equalTo(Checkmark.UNCHECKED));
-//
-//        onPebbleReceived((dict) -> {
-//            assertThat(dict.getString(0), equalTo("OK"));
-//            int value = habit1.getCheckmarks().getTodayValue();
-//            assertThat(value, equalTo(200)); //Checkmark.CHECKED_EXPLICITLY));
-//        });
-//
-//        PebbleDictionary dict = buildToggleRequest(habit1.getId());
-//        sendFromPebbleToAndroid(dict);
-//        awaitLatch();
-//    }
-
-    @NonNull
-    protected PebbleDictionary buildCountRequest()
-    {
-        PebbleDictionary dict = new PebbleDictionary();
-        dict.addString(0, "COUNT");
-        return dict;
-    }
-
-    @NonNull
-    protected PebbleDictionary buildFetchRequest(int position)
-    {
-        PebbleDictionary dict = new PebbleDictionary();
-        dict.addString(0, "FETCH");
-        dict.addInt32(1, position);
-        return dict;
-    }
-
-    protected void onPebbleReceived(PebbleProcessor processor)
-    {
-        BroadcastReceiver pebbleReceiver = new BroadcastReceiver()
-        {
-            @Override
-            public void onReceive(Context context, Intent intent)
-            {
-                try
-                {
-                    String jsonData = intent.getStringExtra(MSG_DATA);
-                    PebbleDictionary dict = PebbleDictionary.fromJson(jsonData);
-                    processor.process(dict);
-                    latch.countDown();
-                    targetContext.unregisterReceiver(this);
-                }
-                catch (JSONException e)
-                {
-                    throw new RuntimeException(e);
-                }
-            }
-        };
-
-        IntentFilter filter = new IntentFilter(Constants.INTENT_APP_SEND);
-        targetContext.registerReceiver(pebbleReceiver, filter);
-    }
-
-    protected void sendFromPebbleToAndroid(PebbleDictionary dict)
-    {
-        Intent intent = new Intent(Constants.INTENT_APP_RECEIVE);
-        intent.putExtra(Constants.APP_UUID, PebbleReceiver.WATCHAPP_UUID);
-        intent.putExtra(Constants.TRANSACTION_ID, 0);
-        intent.putExtra(Constants.MSG_DATA, dict.toJsonString());
-        targetContext.sendBroadcast(intent);
-    }
-
-    private PebbleDictionary buildToggleRequest(long habitId)
-    {
-        PebbleDictionary dict = new PebbleDictionary();
-        dict.addString(0, "TOGGLE");
-        dict.addInt32(1, (int) habitId);
-        return dict;
-    }
-
-    interface PebbleProcessor
-    {
-        void process(PebbleDictionary dict);
-    }
-}

app/src/androidTest/java/org/isoron/uhabits/tasks/ExportCSVTaskTest.java

@@ -56,7 +56,7 @@ public class ExportCSVTaskTest extends BaseAndroidTest
         for (Habit h : habitList) selected.add(h);
 
         taskRunner.execute(
-            new ExportCSVTask(habitList, selected, archiveFilename -> {
+            new ExportCSVTask(targetContext,habitList, selected, archiveFilename -> {
                 assertThat(archiveFilename, is(not(nullValue())));
                 File f = new File(archiveFilename);
                 assertTrue(f.exists());

app/src/androidTest/java/org/isoron/uhabits/tasks/ExportDBTaskTest.java

@@ -46,7 +46,7 @@ public class ExportDBTaskTest extends BaseAndroidTest
     @Test
     public void testExportCSV() throws Throwable
     {
-        ExportDBTask task = new ExportDBTask(filename -> {
+        ExportDBTask task = new ExportDBTask(targetContext, filename -> {
             assertThat(filename, is(not(nullValue())));
 
             File f = new File(filename);

app/src/main/AndroidManifest.xml

@@ -21,8 +21,8 @@
 <manifest
     package="org.isoron.uhabits"
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:versionCode="23"
-    android:versionName="1.6.0">
+    android:versionCode="38"
+    android:versionName="1.7.11">
 
     <uses-permission android:name="android.permission.VIBRATE"/>
 
@@ -223,5 +223,15 @@
             </intent-filter>
         </receiver>
 
+        <provider
+            android:name="android.support.v4.content.FileProvider"
+            android:authorities="org.isoron.uhabits"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+
     </application>
 </manifest>

app/src/main/assets/migrations/15.sql

@@ -0,0 +1,3 @@
+delete from Score;
+delete from Streak;
+delete from Checkmarks;

app/src/main/java/com/activeandroid/ActiveAndroid.java

@@ -0,0 +1,86 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+
+import com.activeandroid.util.Log;
+
+public final class ActiveAndroid {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static void initialize(Context context) {
+		initialize(new Configuration.Builder(context).create());
+	}
+
+	public static void initialize(Configuration configuration) {
+		initialize(configuration, false);
+	}
+
+	public static void initialize(Context context, boolean loggingEnabled) {
+		initialize(new Configuration.Builder(context).create(), loggingEnabled);
+	}
+
+	public static void initialize(Configuration configuration, boolean loggingEnabled) {
+		// Set logging enabled first
+		setLoggingEnabled(loggingEnabled);
+		Cache.initialize(configuration);
+	}
+
+	public static void clearCache() {
+		Cache.clear();
+	}
+
+	public static void dispose() {
+		Cache.dispose();
+	}
+
+	public static void setLoggingEnabled(boolean enabled) {
+		Log.setEnabled(enabled);
+	}
+
+	public static SQLiteDatabase getDatabase() {
+		return Cache.openDatabase();
+	}
+
+	public static void beginTransaction() {
+		Cache.openDatabase().beginTransaction();
+	}
+
+	public static void endTransaction() {
+		Cache.openDatabase().endTransaction();
+	}
+
+	public static void setTransactionSuccessful() {
+		Cache.openDatabase().setTransactionSuccessful();
+	}
+
+	public static boolean inTransaction() {
+		return Cache.openDatabase().inTransaction();
+	}
+
+	public static void execSQL(String sql) {
+		Cache.openDatabase().execSQL(sql);
+	}
+
+	public static void execSQL(String sql, Object[] bindArgs) {
+		Cache.openDatabase().execSQL(sql, bindArgs);
+	}
+}

app/src/main/java/com/activeandroid/Cache.java

@@ -0,0 +1,158 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.Collection;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.support.v4.util.LruCache;
+
+import com.activeandroid.serializer.TypeSerializer;
+import com.activeandroid.util.Log;
+
+public final class Cache {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC CONSTANTS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static final int DEFAULT_CACHE_SIZE = 1024;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE MEMBERS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private static Context sContext;
+
+	private static ModelInfo sModelInfo;
+	private static DatabaseHelper sDatabaseHelper;
+
+	private static LruCache<String, Model> sEntities;
+
+	private static boolean sIsInitialized = false;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Cache() {
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static synchronized void initialize(Configuration configuration) {
+		if (sIsInitialized) {
+			Log.v("ActiveAndroid already initialized.");
+			return;
+		}
+
+		sContext = configuration.getContext();
+		sModelInfo = new ModelInfo(configuration);
+		sDatabaseHelper = new DatabaseHelper(configuration);
+
+		// TODO: It would be nice to override sizeOf here and calculate the memory
+		// actually used, however at this point it seems like the reflection
+		// required would be too costly to be of any benefit. We'll just set a max
+		// object size instead.
+		sEntities = new LruCache<String, Model>(configuration.getCacheSize());
+
+		openDatabase();
+
+		sIsInitialized = true;
+
+		Log.v("ActiveAndroid initialized successfully.");
+	}
+
+	public static synchronized void clear() {
+		sEntities.evictAll();
+		Log.v("Cache cleared.");
+	}
+
+	public static synchronized void dispose() {
+		closeDatabase();
+
+		sEntities = null;
+		sModelInfo = null;
+		sDatabaseHelper = null;
+
+		sIsInitialized = false;
+
+		Log.v("ActiveAndroid disposed. Call initialize to use library.");
+	}
+
+	// Database access
+	
+	public static boolean isInitialized() {
+		return sIsInitialized;
+	}
+
+	public static synchronized SQLiteDatabase openDatabase() {
+		return sDatabaseHelper.getWritableDatabase();
+	}
+
+	public static synchronized void closeDatabase() {
+		sDatabaseHelper.close();
+	}
+
+	// Context access
+
+	public static Context getContext() {
+		return sContext;
+	}
+
+	// Entity cache
+
+	public static String getIdentifier(Class<? extends Model> type, Long id) {
+		return getTableName(type) + "@" + id;
+	}
+
+	public static String getIdentifier(Model entity) {
+		return getIdentifier(entity.getClass(), entity.getId());
+	}
+
+	public static synchronized void addEntity(Model entity) {
+		sEntities.put(getIdentifier(entity), entity);
+	}
+
+	public static synchronized Model getEntity(Class<? extends Model> type, long id) {
+		return sEntities.get(getIdentifier(type, id));
+	}
+
+	public static synchronized void removeEntity(Model entity) {
+		sEntities.remove(getIdentifier(entity));
+	}
+
+	// Model cache
+
+	public static synchronized Collection<TableInfo> getTableInfos() {
+		return sModelInfo.getTableInfos();
+	}
+
+	public static synchronized TableInfo getTableInfo(Class<? extends Model> type) {
+		return sModelInfo.getTableInfo(type);
+	}
+
+	public static synchronized TypeSerializer getParserForType(Class<?> type) {
+		return sModelInfo.getTypeSerializer(type);
+	}
+
+	public static synchronized String getTableName(Class<? extends Model> type) {
+		return sModelInfo.getTableInfo(type).getTableName();
+	}
+}

app/src/main/java/com/activeandroid/Configuration.java

@@ -0,0 +1,318 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import android.content.Context;
+
+import com.activeandroid.serializer.TypeSerializer;
+import com.activeandroid.util.Log;
+import com.activeandroid.util.ReflectionUtils;
+
+public class Configuration {
+
+    public final static String SQL_PARSER_LEGACY = "legacy";
+    public final static String SQL_PARSER_DELIMITED = "delimited";
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE MEMBERS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Context mContext;
+	private String mDatabaseName;
+	private int mDatabaseVersion;
+	private String mSqlParser;
+	private List<Class<? extends Model>> mModelClasses;
+	private List<Class<? extends TypeSerializer>> mTypeSerializers;
+	private int mCacheSize;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Configuration(Context context) {
+		mContext = context;
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public Context getContext() {
+		return mContext;
+	}
+
+	public String getDatabaseName() {
+		return mDatabaseName;
+	}
+
+	public int getDatabaseVersion() {
+		return mDatabaseVersion;
+	}
+	
+	public String getSqlParser() {
+	    return mSqlParser;
+	}
+
+	public List<Class<? extends Model>> getModelClasses() {
+		return mModelClasses;
+	}
+
+	public List<Class<? extends TypeSerializer>> getTypeSerializers() {
+		return mTypeSerializers;
+	}
+
+	public int getCacheSize() {
+		return mCacheSize;
+	}
+
+	public boolean isValid() {
+		return mModelClasses != null && mModelClasses.size() > 0;
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// INNER CLASSES
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static class Builder {
+		//////////////////////////////////////////////////////////////////////////////////////
+		// PRIVATE CONSTANTS
+		//////////////////////////////////////////////////////////////////////////////////////
+
+		private static final String AA_DB_NAME = "AA_DB_NAME";
+		private static final String AA_DB_VERSION = "AA_DB_VERSION";
+		private final static String AA_MODELS = "AA_MODELS";
+		private final static String AA_SERIALIZERS = "AA_SERIALIZERS";
+		private final static String AA_SQL_PARSER = "AA_SQL_PARSER";
+
+		private static final int DEFAULT_CACHE_SIZE = 1024;
+		private static final String DEFAULT_DB_NAME = "Application.db";
+		private static final String DEFAULT_SQL_PARSER = SQL_PARSER_LEGACY;
+
+		//////////////////////////////////////////////////////////////////////////////////////
+		// PRIVATE MEMBERS
+		//////////////////////////////////////////////////////////////////////////////////////
+
+		private Context mContext;
+
+		private Integer mCacheSize;
+		private String mDatabaseName;
+		private Integer mDatabaseVersion;
+		private String mSqlParser;
+		private List<Class<? extends Model>> mModelClasses;
+		private List<Class<? extends TypeSerializer>> mTypeSerializers;
+
+		//////////////////////////////////////////////////////////////////////////////////////
+		// CONSTRUCTORS
+		//////////////////////////////////////////////////////////////////////////////////////
+
+		public Builder(Context context) {
+			mContext = context.getApplicationContext();
+			mCacheSize = DEFAULT_CACHE_SIZE;
+		}
+
+		//////////////////////////////////////////////////////////////////////////////////////
+		// PUBLIC METHODS
+		//////////////////////////////////////////////////////////////////////////////////////
+
+		public Builder setCacheSize(int cacheSize) {
+			mCacheSize = cacheSize;
+			return this;
+		}
+
+		public Builder setDatabaseName(String databaseName) {
+			mDatabaseName = databaseName;
+			return this;
+		}
+
+		public Builder setDatabaseVersion(int databaseVersion) {
+			mDatabaseVersion = databaseVersion;
+			return this;
+		}
+		
+		public Builder setSqlParser(String sqlParser) {
+		    mSqlParser = sqlParser;
+		    return this;
+		}
+
+		public Builder addModelClass(Class<? extends Model> modelClass) {
+			if (mModelClasses == null) {
+				mModelClasses = new ArrayList<Class<? extends Model>>();
+			}
+
+			mModelClasses.add(modelClass);
+			return this;
+		}
+
+		public Builder addModelClasses(Class<? extends Model>... modelClasses) {
+			if (mModelClasses == null) {
+				mModelClasses = new ArrayList<Class<? extends Model>>();
+			}
+
+			mModelClasses.addAll(Arrays.asList(modelClasses));
+			return this;
+		}
+
+		public Builder setModelClasses(Class<? extends Model>... modelClasses) {
+			mModelClasses = Arrays.asList(modelClasses);
+			return this;
+		}
+
+		public Builder addTypeSerializer(Class<? extends TypeSerializer> typeSerializer) {
+			if (mTypeSerializers == null) {
+				mTypeSerializers = new ArrayList<Class<? extends TypeSerializer>>();
+			}
+
+			mTypeSerializers.add(typeSerializer);
+			return this;
+		}
+
+		public Builder addTypeSerializers(Class<? extends TypeSerializer>... typeSerializers) {
+			if (mTypeSerializers == null) {
+				mTypeSerializers = new ArrayList<Class<? extends TypeSerializer>>();
+			}
+
+			mTypeSerializers.addAll(Arrays.asList(typeSerializers));
+			return this;
+		}
+
+		public Builder setTypeSerializers(Class<? extends TypeSerializer>... typeSerializers) {
+			mTypeSerializers = Arrays.asList(typeSerializers);
+			return this;
+		}
+
+		public Configuration create() {
+			Configuration configuration = new Configuration(mContext);
+			configuration.mCacheSize = mCacheSize;
+
+			// Get database name from meta-data
+			if (mDatabaseName != null) {
+				configuration.mDatabaseName = mDatabaseName;
+			} else {
+				configuration.mDatabaseName = getMetaDataDatabaseNameOrDefault();
+			}
+
+			// Get database version from meta-data
+			if (mDatabaseVersion != null) {
+				configuration.mDatabaseVersion = mDatabaseVersion;
+			} else {
+				configuration.mDatabaseVersion = getMetaDataDatabaseVersionOrDefault();
+			}
+
+			// Get SQL parser from meta-data
+			if (mSqlParser != null) {
+			    configuration.mSqlParser = mSqlParser;
+			} else {
+			    configuration.mSqlParser = getMetaDataSqlParserOrDefault();
+			}
+			
+			// Get model classes from meta-data
+			if (mModelClasses != null) {
+				configuration.mModelClasses = mModelClasses;
+			} else {
+				final String modelList = ReflectionUtils.getMetaData(mContext, AA_MODELS);
+				if (modelList != null) {
+					configuration.mModelClasses = loadModelList(modelList.split(","));
+				}
+			}
+
+			// Get type serializer classes from meta-data
+			if (mTypeSerializers != null) {
+				configuration.mTypeSerializers = mTypeSerializers;
+			} else {
+				final String serializerList = ReflectionUtils.getMetaData(mContext, AA_SERIALIZERS);
+				if (serializerList != null) {
+					configuration.mTypeSerializers = loadSerializerList(serializerList.split(","));
+				}
+			}
+
+			return configuration;
+		}
+
+		//////////////////////////////////////////////////////////////////////////////////////
+		// PRIVATE METHODS
+		//////////////////////////////////////////////////////////////////////////////////////
+
+		// Meta-data methods
+
+		private String getMetaDataDatabaseNameOrDefault() {
+			String aaName = ReflectionUtils.getMetaData(mContext, AA_DB_NAME);
+			if (aaName == null) {
+				aaName = DEFAULT_DB_NAME;
+			}
+
+			return aaName;
+		}
+
+		private int getMetaDataDatabaseVersionOrDefault() {
+			Integer aaVersion = ReflectionUtils.getMetaData(mContext, AA_DB_VERSION);
+			if (aaVersion == null || aaVersion == 0) {
+				aaVersion = 1;
+			}
+
+			return aaVersion;
+		}
+
+		private String getMetaDataSqlParserOrDefault() {
+		    final String mode = ReflectionUtils.getMetaData(mContext, AA_SQL_PARSER);
+		    if (mode == null) {
+		        return DEFAULT_SQL_PARSER;
+		    }
+		    return mode;
+		}
+
+		private List<Class<? extends Model>> loadModelList(String[] models) {
+			final List<Class<? extends Model>> modelClasses = new ArrayList<Class<? extends Model>>();
+			final ClassLoader classLoader = mContext.getClass().getClassLoader();
+			for (String model : models) {
+				try {
+					Class modelClass = Class.forName(model.trim(), false, classLoader);
+					if (ReflectionUtils.isModel(modelClass)) {
+						modelClasses.add(modelClass);
+					}
+				}
+				catch (ClassNotFoundException e) {
+					Log.e("Couldn't create class.", e);
+				}
+			}
+
+			return modelClasses;
+		}
+
+		private List<Class<? extends TypeSerializer>> loadSerializerList(String[] serializers) {
+			final List<Class<? extends TypeSerializer>> typeSerializers = new ArrayList<Class<? extends TypeSerializer>>();
+			final ClassLoader classLoader = mContext.getClass().getClassLoader();
+			for (String serializer : serializers) {
+				try {
+					Class serializerClass = Class.forName(serializer.trim(), false, classLoader);
+					if (ReflectionUtils.isTypeSerializer(serializerClass)) {
+						typeSerializers.add(serializerClass);
+					}
+				}
+				catch (ClassNotFoundException e) {
+					Log.e("Couldn't create class.", e);
+				}
+			}
+
+			return typeSerializers;
+		}
+
+	}
+}

app/src/main/java/com/activeandroid/DatabaseHelper.java

@@ -0,0 +1,257 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.text.TextUtils;
+
+import com.activeandroid.util.IOUtils;
+import com.activeandroid.util.Log;
+import com.activeandroid.util.NaturalOrderComparator;
+import com.activeandroid.util.SQLiteUtils;
+import com.activeandroid.util.SqlParser;
+
+public final class DatabaseHelper extends SQLiteOpenHelper {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC CONSTANTS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public final static String MIGRATION_PATH = "migrations";
+
+	//////////////////////////////////////////////////////////////////////////////////////
+    // PRIVATE FIELDS
+    //////////////////////////////////////////////////////////////////////////////////////
+
+    private final String mSqlParser;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public DatabaseHelper(Configuration configuration) {
+		super(configuration.getContext(), configuration.getDatabaseName(), null, configuration.getDatabaseVersion());
+		copyAttachedDatabase(configuration.getContext(), configuration.getDatabaseName());
+		mSqlParser = configuration.getSqlParser();
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// OVERRIDEN METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	@Override
+	public void onOpen(SQLiteDatabase db) {
+		executePragmas(db);
+	};
+
+	@Override
+	public void onCreate(SQLiteDatabase db) {
+		executePragmas(db);
+		executeCreate(db);
+		executeMigrations(db, -1, db.getVersion());
+		executeCreateIndex(db);
+	}
+
+	@Override
+	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+		executePragmas(db);
+		executeCreate(db);
+		executeMigrations(db, oldVersion, newVersion);
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public void copyAttachedDatabase(Context context, String databaseName) {
+		final File dbPath = context.getDatabasePath(databaseName);
+
+		// If the database already exists, return
+		if (dbPath.exists()) {
+			return;
+		}
+
+		// Make sure we have a path to the file
+		dbPath.getParentFile().mkdirs();
+
+		// Try to copy database file
+		try {
+			final InputStream inputStream = context.getAssets().open(databaseName);
+			final OutputStream output = new FileOutputStream(dbPath);
+
+			byte[] buffer = new byte[8192];
+			int length;
+
+			while ((length = inputStream.read(buffer, 0, 8192)) > 0) {
+				output.write(buffer, 0, length);
+			}
+
+			output.flush();
+			output.close();
+			inputStream.close();
+		}
+		catch (IOException e) {
+			Log.e("Failed to open file", e);
+		}
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private void executePragmas(SQLiteDatabase db) {
+		if (SQLiteUtils.FOREIGN_KEYS_SUPPORTED) {
+			db.execSQL("PRAGMA foreign_keys=ON;");
+			Log.i("Foreign Keys supported. Enabling foreign key features.");
+		}
+	}
+
+	private void executeCreateIndex(SQLiteDatabase db) {
+		db.beginTransaction();
+		try {
+			for (TableInfo tableInfo : Cache.getTableInfos()) {
+				String[] definitions = SQLiteUtils.createIndexDefinition(tableInfo);
+
+				for (String definition : definitions) {
+					db.execSQL(definition);
+				}
+			}
+			db.setTransactionSuccessful();
+		}
+		finally {
+			db.endTransaction();
+		}
+	}
+
+	private void executeCreate(SQLiteDatabase db) {
+		db.beginTransaction();
+		try {
+			for (TableInfo tableInfo : Cache.getTableInfos()) {
+				db.execSQL(SQLiteUtils.createTableDefinition(tableInfo));
+			}
+			db.setTransactionSuccessful();
+		}
+		finally {
+			db.endTransaction();
+		}
+	}
+
+	private boolean executeMigrations(SQLiteDatabase db, int oldVersion, int newVersion) {
+		boolean migrationExecuted = false;
+		try {
+			final List<String> files = Arrays.asList(Cache.getContext().getAssets().list(MIGRATION_PATH));
+			Collections.sort(files, new NaturalOrderComparator());
+
+			db.beginTransaction();
+			try {
+				for (String file : files) {
+					try {
+						final int version = Integer.valueOf(file.replace(".sql", ""));
+
+						if (version > oldVersion && version <= newVersion) {
+							executeSqlScript(db, file);
+							migrationExecuted = true;
+
+							Log.i(file + " executed succesfully.");
+						}
+					}
+					catch (NumberFormatException e) {
+						Log.w("Skipping invalidly named file: " + file, e);
+					}
+				}
+				db.setTransactionSuccessful();
+			}
+			finally {
+				db.endTransaction();
+			}
+		}
+		catch (IOException e) {
+			Log.e("Failed to execute migrations.", e);
+		}
+
+		return migrationExecuted;
+	}
+
+	private void executeSqlScript(SQLiteDatabase db, String file) {
+
+	    InputStream stream = null;
+
+		try {
+		    stream = Cache.getContext().getAssets().open(MIGRATION_PATH + "/" + file);
+
+		    if (Configuration.SQL_PARSER_DELIMITED.equalsIgnoreCase(mSqlParser)) {
+		        executeDelimitedSqlScript(db, stream);
+
+		    } else {
+		        executeLegacySqlScript(db, stream);
+
+		    }
+
+		} catch (IOException e) {
+			Log.e("Failed to execute " + file, e);
+
+		} finally {
+		    IOUtils.closeQuietly(stream);
+
+		}
+	}
+
+	private void executeDelimitedSqlScript(SQLiteDatabase db, InputStream stream) throws IOException {
+
+	    List<String> commands = SqlParser.parse(stream);
+
+	    for(String command : commands) {
+	        db.execSQL(command);
+	    }
+	}
+
+	private void executeLegacySqlScript(SQLiteDatabase db, InputStream stream) throws IOException {
+
+	    InputStreamReader reader = null;
+        BufferedReader buffer = null;
+
+        try {
+            reader = new InputStreamReader(stream);
+            buffer = new BufferedReader(reader);
+            String line = null;
+
+            while ((line = buffer.readLine()) != null) {
+                line = line.replace(";", "").trim();
+                if (!TextUtils.isEmpty(line)) {
+                    db.execSQL(line);
+                }
+            }
+
+        } finally {
+            IOUtils.closeQuietly(buffer);
+            IOUtils.closeQuietly(reader);
+
+        }
+	}
+}

app/src/main/java/com/activeandroid/Model.java

@@ -0,0 +1,314 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+
+import com.activeandroid.query.Delete;
+import com.activeandroid.query.Select;
+import com.activeandroid.serializer.TypeSerializer;
+import com.activeandroid.util.Log;
+import com.activeandroid.util.ReflectionUtils;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+@SuppressWarnings("unchecked")
+public abstract class Model {
+
+	/** Prime number used for hashcode() implementation. */
+	private static final int HASH_PRIME = 739;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE MEMBERS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Long mId = null;
+
+	private final TableInfo mTableInfo;
+	private final String idName;
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public Model() {
+		mTableInfo = Cache.getTableInfo(getClass());
+		idName = mTableInfo.getIdName();
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public final Long getId() {
+		return mId;
+	}
+
+	public final void delete() {
+		Cache.openDatabase().delete(mTableInfo.getTableName(), idName+"=?", new String[] { getId().toString() });
+		Cache.removeEntity(this);
+	}
+
+	public final Long save() {
+		final SQLiteDatabase db = Cache.openDatabase();
+		final ContentValues values = new ContentValues();
+
+		for (Field field : mTableInfo.getFields()) {
+			final String fieldName = mTableInfo.getColumnName(field);
+			Class<?> fieldType = field.getType();
+
+			field.setAccessible(true);
+
+			try {
+				Object value = field.get(this);
+
+				if (value != null) {
+					final TypeSerializer typeSerializer = Cache.getParserForType(fieldType);
+					if (typeSerializer != null) {
+						// serialize data
+						value = typeSerializer.serialize(value);
+						// set new object type
+						if (value != null) {
+							fieldType = value.getClass();
+							// check that the serializer returned what it promised
+							if (!fieldType.equals(typeSerializer.getSerializedType())) {
+								Log.w(String.format("TypeSerializer returned wrong type: expected a %s but got a %s",
+										typeSerializer.getSerializedType(), fieldType));
+							}
+						}
+					}
+				}
+
+				// TODO: Find a smarter way to do this? This if block is necessary because we
+				// can't know the type until runtime.
+				if (value == null) {
+					values.putNull(fieldName);
+				}
+				else if (fieldType.equals(Byte.class) || fieldType.equals(byte.class)) {
+					values.put(fieldName, (Byte) value);
+				}
+				else if (fieldType.equals(Short.class) || fieldType.equals(short.class)) {
+					values.put(fieldName, (Short) value);
+				}
+				else if (fieldType.equals(Integer.class) || fieldType.equals(int.class)) {
+					values.put(fieldName, (Integer) value);
+				}
+				else if (fieldType.equals(Long.class) || fieldType.equals(long.class)) {
+					values.put(fieldName, (Long) value);
+				}
+				else if (fieldType.equals(Float.class) || fieldType.equals(float.class)) {
+					values.put(fieldName, (Float) value);
+				}
+				else if (fieldType.equals(Double.class) || fieldType.equals(double.class)) {
+					values.put(fieldName, (Double) value);
+				}
+				else if (fieldType.equals(Boolean.class) || fieldType.equals(boolean.class)) {
+					values.put(fieldName, (Boolean) value);
+				}
+				else if (fieldType.equals(Character.class) || fieldType.equals(char.class)) {
+					values.put(fieldName, value.toString());
+				}
+				else if (fieldType.equals(String.class)) {
+					values.put(fieldName, value.toString());
+				}
+				else if (fieldType.equals(Byte[].class) || fieldType.equals(byte[].class)) {
+					values.put(fieldName, (byte[]) value);
+				}
+				else if (ReflectionUtils.isModel(fieldType)) {
+					values.put(fieldName, ((Model) value).getId());
+				}
+				else if (ReflectionUtils.isSubclassOf(fieldType, Enum.class)) {
+					values.put(fieldName, ((Enum<?>) value).name());
+				}
+			}
+			catch (IllegalArgumentException e) {
+				Log.e(e.getClass().getName(), e);
+			}
+			catch (IllegalAccessException e) {
+				Log.e(e.getClass().getName(), e);
+			}
+		}
+
+		if (mId == null) {
+			mId = db.insert(mTableInfo.getTableName(), null, values);
+		}
+		else {
+			db.update(mTableInfo.getTableName(), values, idName+"=" + mId, null);
+		}
+
+		return mId;
+	}
+
+	// Convenience methods
+
+	public static void delete(Class<? extends Model> type, long id) {
+		TableInfo tableInfo = Cache.getTableInfo(type);
+		new Delete().from(type).where(tableInfo.getIdName()+"=?", id).execute();
+	}
+
+	public static <T extends Model> T load(Class<T> type, long id) {
+		TableInfo tableInfo = Cache.getTableInfo(type);
+		return (T) new Select().from(type).where(tableInfo.getIdName()+"=?", id).executeSingle();
+	}
+
+	// Model population
+
+	public final void loadFromCursor(Cursor cursor) {
+        /**
+         * Obtain the columns ordered to fix issue #106 (https://github.com/pardom/ActiveAndroid/issues/106)
+         * when the cursor have multiple columns with same name obtained from join tables.
+         */
+        List<String> columnsOrdered = new ArrayList<String>(Arrays.asList(cursor.getColumnNames()));
+		for (Field field : mTableInfo.getFields()) {
+			final String fieldName = mTableInfo.getColumnName(field);
+			Class<?> fieldType = field.getType();
+			final int columnIndex = columnsOrdered.indexOf(fieldName);
+
+			if (columnIndex < 0) {
+				continue;
+			}
+
+			field.setAccessible(true);
+
+			try {
+				boolean columnIsNull = cursor.isNull(columnIndex);
+				TypeSerializer typeSerializer = Cache.getParserForType(fieldType);
+				Object value = null;
+
+				if (typeSerializer != null) {
+					fieldType = typeSerializer.getSerializedType();
+				}
+
+				// TODO: Find a smarter way to do this? This if block is necessary because we
+				// can't know the type until runtime.
+				if (columnIsNull) {
+					field = null;
+				}
+				else if (fieldType.equals(Byte.class) || fieldType.equals(byte.class)) {
+					value = cursor.getInt(columnIndex);
+				}
+				else if (fieldType.equals(Short.class) || fieldType.equals(short.class)) {
+					value = cursor.getInt(columnIndex);
+				}
+				else if (fieldType.equals(Integer.class) || fieldType.equals(int.class)) {
+					value = cursor.getInt(columnIndex);
+				}
+				else if (fieldType.equals(Long.class) || fieldType.equals(long.class)) {
+					value = cursor.getLong(columnIndex);
+				}
+				else if (fieldType.equals(Float.class) || fieldType.equals(float.class)) {
+					value = cursor.getFloat(columnIndex);
+				}
+				else if (fieldType.equals(Double.class) || fieldType.equals(double.class)) {
+					value = cursor.getDouble(columnIndex);
+				}
+				else if (fieldType.equals(Boolean.class) || fieldType.equals(boolean.class)) {
+					value = cursor.getInt(columnIndex) != 0;
+				}
+				else if (fieldType.equals(Character.class) || fieldType.equals(char.class)) {
+					value = cursor.getString(columnIndex).charAt(0);
+				}
+				else if (fieldType.equals(String.class)) {
+					value = cursor.getString(columnIndex);
+				}
+				else if (fieldType.equals(Byte[].class) || fieldType.equals(byte[].class)) {
+					value = cursor.getBlob(columnIndex);
+				}
+				else if (ReflectionUtils.isModel(fieldType)) {
+					final long entityId = cursor.getLong(columnIndex);
+					final Class<? extends Model> entityType = (Class<? extends Model>) fieldType;
+
+					Model entity = Cache.getEntity(entityType, entityId);
+					if (entity == null) {
+						entity = new Select().from(entityType).where(idName+"=?", entityId).executeSingle();
+					}
+
+					value = entity;
+				}
+				else if (ReflectionUtils.isSubclassOf(fieldType, Enum.class)) {
+					@SuppressWarnings("rawtypes")
+					final Class<? extends Enum> enumType = (Class<? extends Enum>) fieldType;
+					value = Enum.valueOf(enumType, cursor.getString(columnIndex));
+				}
+
+				// Use a deserializer if one is available
+				if (typeSerializer != null && !columnIsNull) {
+					value = typeSerializer.deserialize(value);
+				}
+
+				// Set the field value
+				if (value != null) {
+					field.set(this, value);
+				}
+			}
+			catch (IllegalArgumentException e) {
+				Log.e(e.getClass().getName(), e);
+			}
+			catch (IllegalAccessException e) {
+				Log.e(e.getClass().getName(), e);
+			}
+			catch (SecurityException e) {
+				Log.e(e.getClass().getName(), e);
+			}
+		}
+
+		if (mId != null) {
+			Cache.addEntity(this);
+		}
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PROTECTED METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	protected final <T extends Model> List<T> getMany(Class<T> type, String foreignKey) {
+		return new Select().from(type).where(Cache.getTableName(type) + "." + foreignKey + "=?", getId()).execute();
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// OVERRIDEN METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	@Override
+	public String toString() {
+		return mTableInfo.getTableName() + "@" + getId();
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (obj instanceof Model && this.mId != null) {
+			final Model other = (Model) obj;
+
+			return this.mId.equals(other.mId)							
+							&& (this.mTableInfo.getTableName().equals(other.mTableInfo.getTableName()));
+		} else {
+			return this == obj;
+		}
+	}
+
+	@Override
+	public int hashCode() {
+		int hash = HASH_PRIME;
+		hash += HASH_PRIME * (mId == null ? super.hashCode() : mId.hashCode()); //if id is null, use Object.hashCode()
+		hash += HASH_PRIME * mTableInfo.getTableName().hashCode();
+		return hash; //To change body of generated methods, choose Tools | Templates.
+	}
+}

app/src/main/java/com/activeandroid/ModelInfo.java

@@ -0,0 +1,209 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import android.content.Context;
+
+import com.activeandroid.serializer.CalendarSerializer;
+import com.activeandroid.serializer.SqlDateSerializer;
+import com.activeandroid.serializer.TypeSerializer;
+import com.activeandroid.serializer.UtilDateSerializer;
+import com.activeandroid.serializer.FileSerializer;
+import com.activeandroid.util.Log;
+import com.activeandroid.util.ReflectionUtils;
+import dalvik.system.DexFile;
+
+final class ModelInfo {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Map<Class<? extends Model>, TableInfo> mTableInfos = new HashMap<Class<? extends Model>, TableInfo>();
+	private Map<Class<?>, TypeSerializer> mTypeSerializers = new HashMap<Class<?>, TypeSerializer>() {
+		{
+			put(Calendar.class, new CalendarSerializer());
+			put(java.sql.Date.class, new SqlDateSerializer());
+			put(java.util.Date.class, new UtilDateSerializer());
+			put(java.io.File.class, new FileSerializer());
+		}
+	};
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public ModelInfo(Configuration configuration) {
+		if (!loadModelFromMetaData(configuration)) {
+			try {
+				scanForModel(configuration.getContext());
+			}
+			catch (IOException e) {
+				Log.e("Couldn't open source path.", e);
+			}
+		}
+
+		Log.i("ModelInfo loaded.");
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public Collection<TableInfo> getTableInfos() {
+		return mTableInfos.values();
+	}
+
+	public TableInfo getTableInfo(Class<? extends Model> type) {
+		return mTableInfos.get(type);
+	}
+
+	public TypeSerializer getTypeSerializer(Class<?> type) {
+		return mTypeSerializers.get(type);
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private boolean loadModelFromMetaData(Configuration configuration) {
+		if (!configuration.isValid()) {
+			return false;
+		}
+
+		final List<Class<? extends Model>> models = configuration.getModelClasses();
+		if (models != null) {
+			for (Class<? extends Model> model : models) {
+				mTableInfos.put(model, new TableInfo(model));
+			}
+		}
+
+		final List<Class<? extends TypeSerializer>> typeSerializers = configuration.getTypeSerializers();
+		if (typeSerializers != null) {
+			for (Class<? extends TypeSerializer> typeSerializer : typeSerializers) {
+				try {
+					TypeSerializer instance = typeSerializer.newInstance();
+					mTypeSerializers.put(instance.getDeserializedType(), instance);
+				}
+				catch (InstantiationException e) {
+					Log.e("Couldn't instantiate TypeSerializer.", e);
+				}
+				catch (IllegalAccessException e) {
+					Log.e("IllegalAccessException", e);
+				}
+			}
+		}
+
+		return true;
+	}
+
+	private void scanForModel(Context context) throws IOException {
+		String packageName = context.getPackageName();
+		String sourcePath = context.getApplicationInfo().sourceDir;
+		List<String> paths = new ArrayList<String>();
+
+		if (sourcePath != null && !(new File(sourcePath).isDirectory())) {
+			DexFile dexfile = new DexFile(sourcePath);
+			Enumeration<String> entries = dexfile.entries();
+
+			while (entries.hasMoreElements()) {
+				paths.add(entries.nextElement());
+			}
+		}
+		// Robolectric fallback
+		else {
+			ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+			Enumeration<URL> resources = classLoader.getResources("");
+
+			while (resources.hasMoreElements()) {
+				String path = resources.nextElement().getFile();
+				if (path.contains("bin") || path.contains("classes")) {
+					paths.add(path);
+				}
+			}
+		}
+
+		for (String path : paths) {
+			File file = new File(path);
+			scanForModelClasses(file, packageName, context.getClassLoader());
+		}
+	}
+
+	private void scanForModelClasses(File path, String packageName, ClassLoader classLoader) {
+		if (path.isDirectory()) {
+			for (File file : path.listFiles()) {
+				scanForModelClasses(file, packageName, classLoader);
+			}
+		}
+		else {
+			String className = path.getName();
+
+			// Robolectric fallback
+			if (!path.getPath().equals(className)) {
+				className = path.getPath();
+
+				if (className.endsWith(".class")) {
+					className = className.substring(0, className.length() - 6);
+				}
+				else {
+					return;
+				}
+
+				className = className.replace(System.getProperty("file.separator"), ".");
+
+				int packageNameIndex = className.lastIndexOf(packageName);
+				if (packageNameIndex < 0) {
+					return;
+				}
+
+				className = className.substring(packageNameIndex);
+			}
+
+			try {
+				Class<?> discoveredClass = Class.forName(className, false, classLoader);
+				if (ReflectionUtils.isModel(discoveredClass)) {
+					@SuppressWarnings("unchecked")
+					Class<? extends Model> modelClass = (Class<? extends Model>) discoveredClass;
+					mTableInfos.put(modelClass, new TableInfo(modelClass));
+				}
+				else if (ReflectionUtils.isTypeSerializer(discoveredClass)) {
+					TypeSerializer instance = (TypeSerializer) discoveredClass.newInstance();
+					mTypeSerializers.put(instance.getDeserializedType(), instance);
+				}
+			}
+			catch (ClassNotFoundException e) {
+				Log.e("Couldn't create class.", e);
+			}
+			catch (InstantiationException e) {
+				Log.e("Couldn't instantiate TypeSerializer.", e);
+			}
+			catch (IllegalAccessException e) {
+				Log.e("IllegalAccessException", e);
+			}
+		}
+	}
+}

app/src/main/java/com/activeandroid/TableInfo.java

@@ -0,0 +1,124 @@
+package com.activeandroid;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.activeandroid.annotation.Column;
+import com.activeandroid.annotation.Table;
+import com.activeandroid.util.ReflectionUtils;
+
+public final class TableInfo {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE MEMBERS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Class<? extends Model> mType;
+	private String mTableName;
+	private String mIdName = Table.DEFAULT_ID_NAME;
+
+	private Map<Field, String> mColumnNames = new LinkedHashMap<Field, String>();
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public TableInfo(Class<? extends Model> type) {
+		mType = type;
+
+		final Table tableAnnotation = type.getAnnotation(Table.class);
+
+        if (tableAnnotation != null) {
+			mTableName = tableAnnotation.name();
+			mIdName = tableAnnotation.id();
+		}
+		else {
+			mTableName = type.getSimpleName();
+        }
+
+        // Manually add the id column since it is not declared like the other columns.
+        Field idField = getIdField(type);
+        mColumnNames.put(idField, mIdName);
+
+        List<Field> fields = new LinkedList<Field>(ReflectionUtils.getDeclaredColumnFields(type));
+        Collections.reverse(fields);
+
+        for (Field field : fields) {
+            if (field.isAnnotationPresent(Column.class)) {
+                final Column columnAnnotation = field.getAnnotation(Column.class);
+                String columnName = columnAnnotation.name();
+                if (TextUtils.isEmpty(columnName)) {
+                    columnName = field.getName();
+                }
+
+                mColumnNames.put(field, columnName);
+            }
+        }
+
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public Class<? extends Model> getType() {
+		return mType;
+	}
+
+	public String getTableName() {
+		return mTableName;
+	}
+
+	public String getIdName() {
+		return mIdName;
+	}
+
+	public Collection<Field> getFields() {
+		return mColumnNames.keySet();
+	}
+
+	public String getColumnName(Field field) {
+		return mColumnNames.get(field);
+	}
+
+
+    private Field getIdField(Class<?> type) {
+        if (type.equals(Model.class)) {
+            try {
+                return type.getDeclaredField("mId");
+            }
+            catch (NoSuchFieldException e) {
+                Log.e("Impossible!", e.toString());
+            }
+        }
+        else if (type.getSuperclass() != null) {
+            return getIdField(type.getSuperclass());
+        }
+
+        return null;
+    }
+
+}

app/src/main/java/com/activeandroid/annotation/Column.java

@@ -0,0 +1,110 @@
+package com.activeandroid.annotation;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.FIELD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Column {
+	public enum ConflictAction {
+		ROLLBACK, ABORT, FAIL, IGNORE, REPLACE
+	}
+
+	public enum ForeignKeyAction {
+		SET_NULL, SET_DEFAULT, CASCADE, RESTRICT, NO_ACTION
+	}
+
+	public String name() default "";
+
+	public int length() default -1;
+
+	public boolean notNull() default false;
+
+	public ConflictAction onNullConflict() default ConflictAction.FAIL;
+
+	public ForeignKeyAction onDelete() default ForeignKeyAction.NO_ACTION;
+
+	public ForeignKeyAction onUpdate() default ForeignKeyAction.NO_ACTION;
+
+	public boolean unique() default false;
+
+	public ConflictAction onUniqueConflict() default ConflictAction.FAIL;
+
+	/*
+	 * If set uniqueGroups = {"group_name"}, we will create a table constraint with group.
+	 *
+	 * Example:
+	 *
+	 * @Table(name = "table_name")
+	 * public class Table extends Model {
+	 *     @Column(name = "member1", uniqueGroups = {"group1"}, onUniqueConflicts = {ConflictAction.FAIL})
+	 *     public String member1;
+	 *
+	 *     @Column(name = "member2", uniqueGroups = {"group1", "group2"}, onUniqueConflicts = {ConflictAction.FAIL, ConflictAction.IGNORE})
+	 *     public String member2;
+	 *
+	 *     @Column(name = "member3", uniqueGroups = {"group2"}, onUniqueConflicts = {ConflictAction.IGNORE})
+	 *     public String member3;
+	 * }
+	 *
+	 * CREATE TABLE table_name (..., UNIQUE (member1, member2) ON CONFLICT FAIL, UNIQUE (member2, member3) ON CONFLICT IGNORE)
+	 */
+	public String[] uniqueGroups() default {};
+
+	public ConflictAction[] onUniqueConflicts() default {};
+
+	/*
+	 * If set index = true, we will create a index with single column.
+	 *
+	 * Example:
+	 *
+	 * @Table(name = "table_name")
+	 * public class Table extends Model {
+	 *     @Column(name = "member", index = true)
+	 *     public String member;
+	 * }
+	 *
+	 * Execute CREATE INDEX index_table_name_member on table_name(member)
+	 */
+	public boolean index() default false;
+
+	/*
+	 * If set indexGroups = {"group_name"}, we will create a index with group.
+	 *
+	 * Example:
+	 *
+	 * @Table(name = "table_name")
+	 * public class Table extends Model {
+	 *     @Column(name = "member1", indexGroups = {"group1"})
+	 *     public String member1;
+	 *
+	 *     @Column(name = "member2", indexGroups = {"group1", "group2"})
+	 *     public String member2;
+	 *
+	 *     @Column(name = "member3", indexGroups = {"group2"})
+	 *     public String member3;
+	 * }
+	 *
+	 * Execute CREATE INDEX index_table_name_group1 on table_name(member1, member2)
+	 * Execute CREATE INDEX index_table_name_group2 on table_name(member2, member3)
+	 */
+	public String[] indexGroups() default {};
+}

app/src/main/java/com/activeandroid/annotation/Table.java

@@ -0,0 +1,31 @@
+package com.activeandroid.annotation;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Table {
+
+	public static final String DEFAULT_ID_NAME = "Id";
+	public String name();
+	public String id() default DEFAULT_ID_NAME;
+}

app/src/main/java/com/activeandroid/query/Delete.java

@@ -0,0 +1,33 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import com.activeandroid.Model;
+
+public final class Delete implements Sqlable {
+	public Delete() {
+	}
+
+	public From from(Class<? extends Model> table) {
+		return new From(table, this);
+	}
+
+	@Override
+	public String toSql() {
+		return "DELETE ";
+	}
+}

app/src/main/java/com/activeandroid/query/From.java

@@ -0,0 +1,344 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.text.TextUtils;
+
+import com.activeandroid.Cache;
+import com.activeandroid.Model;
+import com.activeandroid.query.Join.JoinType;
+import com.activeandroid.util.Log;
+import com.activeandroid.util.SQLiteUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public final class From implements Sqlable {
+	private Sqlable mQueryBase;
+
+	private Class<? extends Model> mType;
+	private String mAlias;
+	private List<Join> mJoins;
+	private final StringBuilder mWhere = new StringBuilder();
+	private String mGroupBy;
+	private String mHaving;
+	private String mOrderBy;
+	private String mLimit;
+	private String mOffset;
+
+	private List<Object> mArguments;
+
+	public From(Class<? extends Model> table, Sqlable queryBase) {
+		mType = table;
+		mJoins = new ArrayList<Join>();
+		mQueryBase = queryBase;
+
+		mJoins = new ArrayList<Join>();
+		mArguments = new ArrayList<Object>();
+	}
+
+	public From as(String alias) {
+		mAlias = alias;
+		return this;
+	}
+
+	public Join join(Class<? extends Model> table) {
+		Join join = new Join(this, table, null);
+		mJoins.add(join);
+		return join;
+	}
+
+	public Join leftJoin(Class<? extends Model> table) {
+		Join join = new Join(this, table, JoinType.LEFT);
+		mJoins.add(join);
+		return join;
+	}
+
+	public Join outerJoin(Class<? extends Model> table) {
+		Join join = new Join(this, table, JoinType.OUTER);
+		mJoins.add(join);
+		return join;
+	}
+
+	public Join innerJoin(Class<? extends Model> table) {
+		Join join = new Join(this, table, JoinType.INNER);
+		mJoins.add(join);
+		return join;
+	}
+
+	public Join crossJoin(Class<? extends Model> table) {
+		Join join = new Join(this, table, JoinType.CROSS);
+		mJoins.add(join);
+		return join;
+	}
+
+    public From where(String clause) {
+        // Chain conditions if a previous condition exists.
+        if (mWhere.length() > 0) {
+            mWhere.append(" AND ");
+        }
+        mWhere.append(clause);
+        return this;
+    }
+
+    public From where(String clause, Object... args) {
+        where(clause).addArguments(args);
+        return this;
+    }
+
+    public From and(String clause) {
+        return where(clause);
+    }
+
+    public From and(String clause, Object... args) {
+        return where(clause, args);
+    }
+
+    public From or(String clause) {
+        if (mWhere.length() > 0) {
+            mWhere.append(" OR ");
+        }
+        mWhere.append(clause);
+        return this;
+    }
+
+    public From or(String clause, Object... args) {
+        or(clause).addArguments(args);
+        return this;
+    }
+    
+	public From groupBy(String groupBy) {
+		mGroupBy = groupBy;
+		return this;
+	}
+
+	public From having(String having) {
+		mHaving = having;
+		return this;
+	}
+
+	public From orderBy(String orderBy) {
+		mOrderBy = orderBy;
+		return this;
+	}
+
+	public From limit(int limit) {
+		return limit(String.valueOf(limit));
+	}
+
+	public From limit(String limit) {
+		mLimit = limit;
+		return this;
+	}
+
+	public From offset(int offset) {
+		return offset(String.valueOf(offset));
+	}
+
+	public From offset(String offset) {
+		mOffset = offset;
+		return this;
+	}
+
+	void addArguments(Object[] args) {
+        for(Object arg : args) {
+            if (arg.getClass() == boolean.class || arg.getClass() == Boolean.class) {
+                arg = (arg.equals(true) ? 1 : 0);
+            }
+            mArguments.add(arg);
+        }
+	}
+
+    private void addFrom(final StringBuilder sql) {
+        sql.append("FROM ");
+        sql.append(Cache.getTableName(mType)).append(" ");
+
+        if (mAlias != null) {
+            sql.append("AS ");
+            sql.append(mAlias);
+            sql.append(" ");
+        }
+    }
+
+    private void addJoins(final StringBuilder sql) {
+        for (final Join join : mJoins) {
+            sql.append(join.toSql());
+        }
+    }
+
+    private void addWhere(final StringBuilder sql) {
+        if (mWhere.length() > 0) {
+            sql.append("WHERE ");
+            sql.append(mWhere);
+            sql.append(" ");
+        }
+    }
+
+    private void addGroupBy(final StringBuilder sql) {
+        if (mGroupBy != null) {
+            sql.append("GROUP BY ");
+            sql.append(mGroupBy);
+            sql.append(" ");
+        }
+    }
+
+    private void addHaving(final StringBuilder sql) {
+        if (mHaving != null) {
+            sql.append("HAVING ");
+            sql.append(mHaving);
+            sql.append(" ");
+        }
+    }
+
+    private void addOrderBy(final StringBuilder sql) {
+        if (mOrderBy != null) {
+            sql.append("ORDER BY ");
+            sql.append(mOrderBy);
+            sql.append(" ");
+        }
+    }
+
+    private void addLimit(final StringBuilder sql) {
+        if (mLimit != null) {
+            sql.append("LIMIT ");
+            sql.append(mLimit);
+            sql.append(" ");
+        }
+    }
+
+    private void addOffset(final StringBuilder sql) {
+        if (mOffset != null) {
+            sql.append("OFFSET ");
+            sql.append(mOffset);
+            sql.append(" ");
+        }
+    }
+
+    private String sqlString(final StringBuilder sql) {
+
+        final String sqlString = sql.toString().trim();
+
+        // Don't waste time building the string
+        // unless we're going to log it.
+        if (Log.isEnabled()) {
+            Log.v(sqlString + " " + TextUtils.join(",", getArguments()));
+        }
+
+        return sqlString;
+    }
+
+    @Override
+    public String toSql() {
+        final StringBuilder sql = new StringBuilder();
+        sql.append(mQueryBase.toSql());
+
+        addFrom(sql);
+        addJoins(sql);
+        addWhere(sql);
+        addGroupBy(sql);
+        addHaving(sql);
+        addOrderBy(sql);
+        addLimit(sql);
+        addOffset(sql);
+
+        return sqlString(sql);
+    }
+
+    public String toExistsSql() {
+
+        final StringBuilder sql = new StringBuilder();
+        sql.append("SELECT EXISTS(SELECT 1 ");
+
+        addFrom(sql);
+        addJoins(sql);
+        addWhere(sql);
+        addGroupBy(sql);
+        addHaving(sql);
+        addLimit(sql);
+        addOffset(sql);
+
+        sql.append(")");
+
+        return sqlString(sql);
+    }
+
+    public String toCountSql() {
+
+        final StringBuilder sql = new StringBuilder();
+        sql.append("SELECT COUNT(*) ");
+
+        addFrom(sql);
+        addJoins(sql);
+        addWhere(sql);
+        addGroupBy(sql);
+        addHaving(sql);
+        addLimit(sql);
+        addOffset(sql);
+
+        return sqlString(sql);
+    }
+
+	public <T extends Model> List<T> execute() {
+		if (mQueryBase instanceof Select) {
+			return SQLiteUtils.rawQuery(mType, toSql(), getArguments());
+			
+		} else {
+			SQLiteUtils.execSql(toSql(), getArguments());
+			return null;
+			
+		}
+	}
+
+	public <T extends Model> T executeSingle() {
+		if (mQueryBase instanceof Select) {
+			limit(1);
+			return (T) SQLiteUtils.rawQuerySingle(mType, toSql(), getArguments());
+			
+		} else {
+			limit(1);
+			SQLiteUtils.rawQuerySingle(mType, toSql(), getArguments()).delete();
+			return null;
+			
+		}
+	}
+	
+    /**
+     * Gets a value indicating whether the query returns any rows.
+     * @return <code>true</code> if the query returns at least one row; otherwise, <code>false</code>.
+     */
+    public boolean exists() {
+        return SQLiteUtils.intQuery(toExistsSql(), getArguments()) != 0;
+    }
+
+    /**
+     * Gets the number of rows returned by the query.
+     */
+    public int count() {
+        return SQLiteUtils.intQuery(toCountSql(), getArguments());
+    }
+
+	public String[] getArguments() {
+		final int size = mArguments.size();
+		final String[] args = new String[size];
+
+		for (int i = 0; i < size; i++) {
+			args[i] = mArguments.get(i).toString();
+		}
+
+		return args;
+	}
+}

app/src/main/java/com/activeandroid/query/Join.java

@@ -0,0 +1,94 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.text.TextUtils;
+
+import com.activeandroid.Cache;
+import com.activeandroid.Model;
+
+public final class Join implements Sqlable {
+	static enum JoinType {
+		LEFT, OUTER, INNER, CROSS
+	}
+
+	private From mFrom;
+	private Class<? extends Model> mType;
+	private String mAlias;
+	private JoinType mJoinType;
+	private String mOn;
+	private String[] mUsing;
+
+	Join(From from, Class<? extends Model> table, JoinType joinType) {
+		mFrom = from;
+		mType = table;
+		mJoinType = joinType;
+	}
+
+	public Join as(String alias) {
+		mAlias = alias;
+		return this;
+	}
+
+	public From on(String on) {
+		mOn = on;
+		return mFrom;
+	}
+
+	public From on(String on, Object... args) {
+		mOn = on;
+		mFrom.addArguments(args);
+		return mFrom;
+	}
+
+	public From using(String... columns) {
+		mUsing = columns;
+		return mFrom;
+	}
+
+	@Override
+	public String toSql() {
+		StringBuilder sql = new StringBuilder();
+
+		if (mJoinType != null) {
+			sql.append(mJoinType.toString()).append(" ");
+		}
+
+		sql.append("JOIN ");
+		sql.append(Cache.getTableName(mType));
+		sql.append(" ");
+
+		if (mAlias != null) {
+			sql.append("AS ");
+			sql.append(mAlias);
+			sql.append(" ");
+		}
+
+		if (mOn != null) {
+			sql.append("ON ");
+			sql.append(mOn);
+			sql.append(" ");
+		}
+		else if (mUsing != null) {
+			sql.append("USING (");
+			sql.append(TextUtils.join(", ", mUsing));
+			sql.append(") ");
+		}
+
+		return sql.toString();
+	}
+}

app/src/main/java/com/activeandroid/query/Select.java

@@ -0,0 +1,93 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.text.TextUtils;
+
+import com.activeandroid.Model;
+
+public final class Select implements Sqlable {
+	private String[] mColumns;
+	private boolean mDistinct = false;
+	private boolean mAll = false;
+
+	public Select() {
+	}
+
+	public Select(String... columns) {
+		mColumns = columns;
+	}
+
+	public Select(Column... columns) {
+		final int size = columns.length;
+		mColumns = new String[size];
+		for (int i = 0; i < size; i++) {
+			mColumns[i] = columns[i].name + " AS " + columns[i].alias;
+		}
+	}
+
+	public Select distinct() {
+		mDistinct = true;
+		mAll = false;
+
+		return this;
+	}
+
+	public Select all() {
+		mDistinct = false;
+		mAll = true;
+
+		return this;
+	}
+
+	public From from(Class<? extends Model> table) {
+		return new From(table, this);
+	}
+
+	public static class Column {
+		String name;
+		String alias;
+
+		public Column(String name, String alias) {
+			this.name = name;
+			this.alias = alias;
+		}
+	}
+
+	@Override
+	public String toSql() {
+		StringBuilder sql = new StringBuilder();
+
+		sql.append("SELECT ");
+
+		if (mDistinct) {
+			sql.append("DISTINCT ");
+		}
+		else if (mAll) {
+			sql.append("ALL ");
+		}
+
+		if (mColumns != null && mColumns.length > 0) {
+			sql.append(TextUtils.join(", ", mColumns) + " ");
+		}
+		else {
+			sql.append("* ");
+		}
+
+		return sql.toString();
+	}
+}

app/src/main/java/com/activeandroid/query/Set.java

@@ -0,0 +1,103 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import com.activeandroid.util.SQLiteUtils;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public final class Set implements Sqlable {
+	private Update mUpdate;
+
+	private String mSet;
+	private String mWhere;
+
+	private List<Object> mSetArguments;
+	private List<Object> mWhereArguments;
+
+	public Set(Update queryBase, String set) {
+		mUpdate = queryBase;
+		mSet = set;
+
+		mSetArguments = new ArrayList<Object>();
+		mWhereArguments = new ArrayList<Object>();
+	}
+
+	public Set(Update queryBase, String set, Object... args) {
+		mUpdate = queryBase;
+		mSet = set;
+
+		mSetArguments = new ArrayList<Object>();
+		mWhereArguments = new ArrayList<Object>();
+
+		mSetArguments.addAll(Arrays.asList(args));
+	}
+
+	public Set where(String where) {
+		mWhere = where;
+		mWhereArguments.clear();
+
+		return this;
+	}
+
+	public Set where(String where, Object... args) {
+		mWhere = where;
+		mWhereArguments.clear();
+		mWhereArguments.addAll(Arrays.asList(args));
+
+		return this;
+	}
+
+	@Override
+	public String toSql() {
+		StringBuilder sql = new StringBuilder();
+		sql.append(mUpdate.toSql());
+		sql.append("SET ");
+		sql.append(mSet);
+		sql.append(" ");
+
+		if (mWhere != null) {
+			sql.append("WHERE ");
+			sql.append(mWhere);
+			sql.append(" ");
+		}
+
+		return sql.toString();
+	}
+
+	public void execute() {
+		SQLiteUtils.execSql(toSql(), getArguments());
+	}
+
+	public String[] getArguments() {
+		final int setSize = mSetArguments.size();
+		final int whereSize = mWhereArguments.size();
+		final String[] args = new String[setSize + whereSize];
+
+		for (int i = 0; i < setSize; i++) {
+			args[i] = mSetArguments.get(i).toString();
+		}
+
+		for (int i = 0; i < whereSize; i++) {
+			args[i + setSize] = mWhereArguments.get(i).toString();
+		}
+
+		return args;
+	}
+}

app/src/main/java/com/activeandroid/query/Sqlable.java

@@ -0,0 +1,21 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public interface Sqlable {
+	public String toSql();
+}

app/src/main/java/com/activeandroid/query/Update.java

@@ -0,0 +1,50 @@
+package com.activeandroid.query;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import com.activeandroid.Cache;
+import com.activeandroid.Model;
+
+public final class Update implements Sqlable {
+	private Class<? extends Model> mType;
+
+	public Update(Class<? extends Model> table) {
+		mType = table;
+	}
+
+	public Set set(String set) {
+		return new Set(this, set);
+	}
+
+	public Set set(String set, Object... args) {
+		return new Set(this, set, args);
+	}
+
+	Class<? extends Model> getType() {
+		return mType;
+	}
+
+	@Override
+	public String toSql() {
+		StringBuilder sql = new StringBuilder();
+		sql.append("UPDATE ");
+		sql.append(Cache.getTableName(mType));
+		sql.append(" ");
+
+		return sql.toString();
+	}
+}

app/src/main/java/com/activeandroid/serializer/BigDecimalSerializer.java

@@ -0,0 +1,29 @@
+package com.activeandroid.serializer;
+
+import java.math.BigDecimal;
+
+public final class BigDecimalSerializer extends TypeSerializer {
+	public Class<?> getDeserializedType() {
+		return BigDecimal.class;
+	}
+
+	public Class<?> getSerializedType() {
+		return String.class;
+	}
+
+	public String serialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return ((BigDecimal) data).toString();
+	}
+
+	public BigDecimal deserialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return new BigDecimal((String) data);
+	}
+}

app/src/main/java/com/activeandroid/serializer/CalendarSerializer.java

@@ -0,0 +1,40 @@
+package com.activeandroid.serializer;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.Calendar;
+
+public final class CalendarSerializer extends TypeSerializer {
+	public Class<?> getDeserializedType() {
+		return Calendar.class;
+	}
+
+	public Class<?> getSerializedType() {
+		return long.class;
+	}
+
+	public Long serialize(Object data) {
+		return ((Calendar) data).getTimeInMillis();
+	}
+
+	public Calendar deserialize(Object data) {
+		Calendar calendar = Calendar.getInstance();
+		calendar.setTimeInMillis((Long) data);
+
+		return calendar;
+	}
+}

app/src/main/java/com/activeandroid/serializer/FileSerializer.java

@@ -0,0 +1,46 @@
+package com.activeandroid.serializer;
+
+import java.io.File;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+public final class FileSerializer extends TypeSerializer {
+	public Class<?> getDeserializedType() {
+		return File.class;
+	}
+
+	public Class<?> getSerializedType() {
+		return String.class;
+	}
+
+	public String serialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return ((File) data).toString();
+	}
+
+	public File deserialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return new File((String) data);
+	}
+}

app/src/main/java/com/activeandroid/serializer/SqlDateSerializer.java

@@ -0,0 +1,45 @@
+package com.activeandroid.serializer;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.sql.Date;
+
+public final class SqlDateSerializer extends TypeSerializer {
+	public Class<?> getDeserializedType() {
+		return Date.class;
+	}
+
+	public Class<?> getSerializedType() {
+		return long.class;
+	}
+
+	public Long serialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return ((Date) data).getTime();
+	}
+
+	public Date deserialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return new Date((Long) data);
+	}
+}

app/src/main/java/com/activeandroid/serializer/TypeSerializer.java

@@ -0,0 +1,27 @@
+package com.activeandroid.serializer;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public abstract class TypeSerializer {
+	public abstract Class<?> getDeserializedType();
+
+	public abstract Class<?> getSerializedType();
+
+	public abstract Object serialize(Object data);
+
+	public abstract Object deserialize(Object data);
+}

app/src/main/java/com/activeandroid/serializer/UUIDSerializer.java

@@ -0,0 +1,29 @@
+package com.activeandroid.serializer;
+
+import java.util.UUID;
+
+public final class UUIDSerializer extends TypeSerializer {
+	public Class<?> getDeserializedType() {
+		return UUID.class;
+	}
+
+	public Class<?> getSerializedType() {
+		return String.class;
+	}
+
+	public String serialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return ((UUID) data).toString();
+	}
+
+	public UUID deserialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return UUID.fromString((String)data);
+	}
+}

app/src/main/java/com/activeandroid/serializer/UtilDateSerializer.java

@@ -0,0 +1,45 @@
+package com.activeandroid.serializer;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.Date;
+
+public final class UtilDateSerializer extends TypeSerializer {
+	public Class<?> getDeserializedType() {
+		return Date.class;
+	}
+
+	public Class<?> getSerializedType() {
+		return long.class;
+	}
+
+	public Long serialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return ((Date) data).getTime();
+	}
+
+	public Date deserialize(Object data) {
+		if (data == null) {
+			return null;
+		}
+
+		return new Date((Long) data);
+	}
+}

app/src/main/java/com/activeandroid/util/IOUtils.java

@@ -0,0 +1,71 @@
+
+package com.activeandroid.util;
+
+/*
+ * Copyright (C) 2014 Markus Pfeiffer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.database.Cursor;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+import com.activeandroid.util.Log;
+
+
+public class IOUtils {
+
+    /**
+     * <p>
+     * Unconditionally close a {@link Closeable}.
+     * </p>
+     * Equivalent to {@link Closeable#close()}, except any exceptions will be ignored. This is
+     * typically used in finally blocks.
+     * @param closeable A {@link Closeable} to close.
+     */
+    public static void closeQuietly(final Closeable closeable) {
+
+        if (closeable == null) {
+            return;
+        }
+
+        try {
+            closeable.close();
+        } catch (final IOException e) {
+            Log.e("Couldn't close closeable.", e);
+        }
+    }
+
+    /**
+     * <p>
+     * Unconditionally close a {@link Cursor}.
+     * </p>
+     * Equivalent to {@link Cursor#close()}, except any exceptions will be ignored. This is
+     * typically used in finally blocks.
+     * @param cursor A {@link Cursor} to close.
+     */
+    public static void closeQuietly(final Cursor cursor) {
+
+        if (cursor == null) {
+            return;
+        }
+
+        try {
+            cursor.close();
+        } catch (final Exception e) {
+            Log.e("Couldn't close cursor.", e);
+        }
+    }
+}

app/src/main/java/com/activeandroid/util/Log.java

@@ -0,0 +1,196 @@
+package com.activeandroid.util;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public final class Log {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC MEMBERS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private static String sTag = "ActiveAndroid";
+	private static boolean sEnabled = false;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// CONSTRUCTORS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private Log() {
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+    public static boolean isEnabled() {
+        return sEnabled;
+    }
+
+	public static void setEnabled(boolean enabled) {
+		sEnabled = enabled;
+	}
+
+	public static boolean isLoggingEnabled() {
+		return sEnabled;
+	}
+
+	public static int v(String msg) {
+		if (sEnabled) {
+			return android.util.Log.v(sTag, msg);
+		}
+		return 0;
+	}
+
+	public static int v(String tag, String msg) {
+		if (sEnabled) {
+			return android.util.Log.v(tag, msg);
+		}
+		return 0;
+	}
+
+	public static int v(String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.v(sTag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int v(String tag, String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.v(tag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int d(String msg) {
+		if (sEnabled) {
+			return android.util.Log.d(sTag, msg);
+		}
+		return 0;
+	}
+
+	public static int d(String tag, String msg) {
+		if (sEnabled) {
+			return android.util.Log.d(tag, msg);
+		}
+		return 0;
+	}
+
+	public static int d(String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.d(sTag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int d(String tag, String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.d(tag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int i(String msg) {
+		if (sEnabled) {
+			return android.util.Log.i(sTag, msg);
+		}
+		return 0;
+	}
+
+	public static int i(String tag, String msg) {
+		if (sEnabled) {
+			return android.util.Log.i(tag, msg);
+		}
+		return 0;
+	}
+
+	public static int i(String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.i(sTag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int i(String tag, String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.i(tag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int w(String msg) {
+		if (sEnabled) {
+			return android.util.Log.w(sTag, msg);
+		}
+		return 0;
+	}
+
+	public static int w(String tag, String msg) {
+		if (sEnabled) {
+			return android.util.Log.w(tag, msg);
+		}
+		return 0;
+	}
+
+	public static int w(String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.w(sTag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int w(String tag, String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.w(tag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int e(String msg) {
+		if (sEnabled) {
+			return android.util.Log.e(sTag, msg);
+		}
+		return 0;
+	}
+
+	public static int e(String tag, String msg) {
+		if (sEnabled) {
+			return android.util.Log.e(tag, msg);
+		}
+		return 0;
+	}
+
+	public static int e(String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.e(sTag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int e(String tag, String msg, Throwable tr) {
+		if (sEnabled) {
+			return android.util.Log.e(tag, msg, tr);
+		}
+		return 0;
+	}
+
+	public static int t(String msg, Object... args) {
+		if (sEnabled) {
+			return android.util.Log.v("test", String.format(msg, args));
+		}
+		return 0;
+	}
+}

app/src/main/java/com/activeandroid/util/NaturalOrderComparator.java

@@ -0,0 +1,141 @@
+package com.activeandroid.util;
+
+/*
+ NaturalOrderComparator.java -- Perform 'natural order' comparisons of strings in Java.
+ Copyright (C) 2003 by Pierre-Luc Paour <natorder@paour.com>
+
+ Based on the C version by Martin Pool, of which this is more or less a straight conversion.
+ Copyright (C) 2000 by Martin Pool <mbp@humbug.org.au>
+
+ This software is provided 'as-is', without any express or implied
+ warranty.  In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+ */
+
+import java.util.Comparator;
+
+public class NaturalOrderComparator implements Comparator<Object> {
+	int compareRight(String a, String b) {
+		int bias = 0;
+		int ia = 0;
+		int ib = 0;
+
+		// The longest run of digits wins. That aside, the greatest
+		// value wins, but we can't know that it will until we've scanned
+		// both numbers to know that they have the same magnitude, so we
+		// remember it in BIAS.
+		for (;; ia++, ib++) {
+			char ca = charAt(a, ia);
+			char cb = charAt(b, ib);
+
+			if (!Character.isDigit(ca) && !Character.isDigit(cb)) {
+				return bias;
+			}
+			else if (!Character.isDigit(ca)) {
+				return -1;
+			}
+			else if (!Character.isDigit(cb)) {
+				return +1;
+			}
+			else if (ca < cb) {
+				if (bias == 0) {
+					bias = -1;
+				}
+			}
+			else if (ca > cb) {
+				if (bias == 0)
+					bias = +1;
+			}
+			else if (ca == 0 && cb == 0) {
+				return bias;
+			}
+		}
+	}
+
+	public int compare(Object o1, Object o2) {
+		String a = o1.toString();
+		String b = o2.toString();
+
+		int ia = 0, ib = 0;
+		int nza = 0, nzb = 0;
+		char ca, cb;
+		int result;
+
+		while (true) {
+			// only count the number of zeroes leading the last number compared
+			nza = nzb = 0;
+
+			ca = charAt(a, ia);
+			cb = charAt(b, ib);
+
+			// skip over leading spaces or zeros
+			while (Character.isSpaceChar(ca) || ca == '0') {
+				if (ca == '0') {
+					nza++;
+				}
+				else {
+					// only count consecutive zeroes
+					nza = 0;
+				}
+
+				ca = charAt(a, ++ia);
+			}
+
+			while (Character.isSpaceChar(cb) || cb == '0') {
+				if (cb == '0') {
+					nzb++;
+				}
+				else {
+					// only count consecutive zeroes
+					nzb = 0;
+				}
+
+				cb = charAt(b, ++ib);
+			}
+
+			// process run of digits
+			if (Character.isDigit(ca) && Character.isDigit(cb)) {
+				if ((result = compareRight(a.substring(ia), b.substring(ib))) != 0) {
+					return result;
+				}
+			}
+
+			if (ca == 0 && cb == 0) {
+				// The strings compare the same. Perhaps the caller
+				// will want to call strcmp to break the tie.
+				return nza - nzb;
+			}
+
+			if (ca < cb) {
+				return -1;
+			}
+			else if (ca > cb) {
+				return +1;
+			}
+
+			++ia;
+			++ib;
+		}
+	}
+
+	static char charAt(String s, int i) {
+		if (i >= s.length()) {
+			return 0;
+		}
+		else {
+			return s.charAt(i);
+		}
+	}
+}

app/src/main/java/com/activeandroid/util/ReflectionUtils.java

@@ -0,0 +1,110 @@
+package com.activeandroid.util;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+
+import com.activeandroid.Model;
+import com.activeandroid.annotation.Column;
+import com.activeandroid.serializer.TypeSerializer;
+
+public final class ReflectionUtils {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static boolean isModel(Class<?> type) {
+		return isSubclassOf(type, Model.class) && (!Modifier.isAbstract(type.getModifiers()));
+	}
+
+	public static boolean isTypeSerializer(Class<?> type) {
+		return isSubclassOf(type, TypeSerializer.class);
+	}
+
+	// Meta-data
+
+	@SuppressWarnings("unchecked")
+	public static <T> T getMetaData(Context context, String name) {
+		try {
+			final ApplicationInfo ai = context.getPackageManager().getApplicationInfo(context.getPackageName(),
+					PackageManager.GET_META_DATA);
+
+			if (ai.metaData != null) {
+				return (T) ai.metaData.get(name);
+			}
+		}
+		catch (Exception e) {
+			Log.w("Couldn't find meta-data: " + name);
+		}
+
+		return null;
+	}
+	
+	public static Set<Field> getDeclaredColumnFields(Class<?> type) {
+		Set<Field> declaredColumnFields = Collections.emptySet();
+		
+		if (ReflectionUtils.isSubclassOf(type, Model.class) || Model.class.equals(type)) {
+			declaredColumnFields = new LinkedHashSet<Field>();
+			
+			Field[] fields = type.getDeclaredFields();
+			Arrays.sort(fields, new Comparator<Field>() {
+				@Override
+				public int compare(Field field1, Field field2) {
+					return field2.getName().compareTo(field1.getName());
+				}
+			});
+			for (Field field : fields) {
+				if (field.isAnnotationPresent(Column.class)) {
+					declaredColumnFields.add(field);
+				}
+			}
+	
+			Class<?> parentType = type.getSuperclass();
+			if (parentType != null) {
+				declaredColumnFields.addAll(getDeclaredColumnFields(parentType));
+			}
+		}
+		
+		return declaredColumnFields;		
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static boolean isSubclassOf(Class<?> type, Class<?> superClass) {
+		if (type.getSuperclass() != null) {
+			if (type.getSuperclass().equals(superClass)) {
+				return true;
+			}
+
+			return isSubclassOf(type.getSuperclass(), superClass);
+		}
+
+		return false;
+	}
+}

app/src/main/java/com/activeandroid/util/SQLiteUtils.java

@@ -0,0 +1,406 @@
+package com.activeandroid.util;
+
+/*
+ * Copyright (C) 2010 Michael Pardo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.database.Cursor;
+import android.os.Build;
+import android.text.TextUtils;
+
+import com.activeandroid.Cache;
+import com.activeandroid.Model;
+import com.activeandroid.TableInfo;
+import com.activeandroid.annotation.Column;
+import com.activeandroid.annotation.Column.ConflictAction;
+import com.activeandroid.serializer.TypeSerializer;
+
+import java.lang.Long;
+import java.lang.String;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+public final class SQLiteUtils {
+	//////////////////////////////////////////////////////////////////////////////////////
+	// ENUMERATIONS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public enum SQLiteType {
+		INTEGER, REAL, TEXT, BLOB
+	}
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC CONSTANTS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static final boolean FOREIGN_KEYS_SUPPORTED = Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE CONTSANTS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	@SuppressWarnings("serial")
+	private static final HashMap<Class<?>, SQLiteType> TYPE_MAP = new HashMap<Class<?>, SQLiteType>() {
+		{
+			put(byte.class, SQLiteType.INTEGER);
+			put(short.class, SQLiteType.INTEGER);
+			put(int.class, SQLiteType.INTEGER);
+			put(long.class, SQLiteType.INTEGER);
+			put(float.class, SQLiteType.REAL);
+			put(double.class, SQLiteType.REAL);
+			put(boolean.class, SQLiteType.INTEGER);
+			put(char.class, SQLiteType.TEXT);
+			put(byte[].class, SQLiteType.BLOB);
+			put(Byte.class, SQLiteType.INTEGER);
+			put(Short.class, SQLiteType.INTEGER);
+			put(Integer.class, SQLiteType.INTEGER);
+			put(Long.class, SQLiteType.INTEGER);
+			put(Float.class, SQLiteType.REAL);
+			put(Double.class, SQLiteType.REAL);
+			put(Boolean.class, SQLiteType.INTEGER);
+			put(Character.class, SQLiteType.TEXT);
+			put(String.class, SQLiteType.TEXT);
+			put(Byte[].class, SQLiteType.BLOB);
+		}
+	};
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PRIVATE MEMBERS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	private static HashMap<String, List<String>> sIndexGroupMap;
+	private static HashMap<String, List<String>> sUniqueGroupMap;
+	private static HashMap<String, ConflictAction> sOnUniqueConflictsMap;
+
+	//////////////////////////////////////////////////////////////////////////////////////
+	// PUBLIC METHODS
+	//////////////////////////////////////////////////////////////////////////////////////
+
+	public static void execSql(String sql) {
+		Cache.openDatabase().execSQL(sql);
+	}
+
+	public static void execSql(String sql, Object[] bindArgs) {
+		Cache.openDatabase().execSQL(sql, bindArgs);
+	}
+
+	public static <T extends Model> List<T> rawQuery(Class<? extends Model> type, String sql, String[] selectionArgs) {
+		Cursor cursor = Cache.openDatabase().rawQuery(sql, selectionArgs);
+		List<T> entities = processCursor(type, cursor);
+		cursor.close();
+
+		return entities;
+	}
+	  
+	public static int intQuery(final String sql, final String[] selectionArgs) {
+        final Cursor cursor = Cache.openDatabase().rawQuery(sql, selectionArgs);
+        final int number = processIntCursor(cursor);
+        cursor.close();
+
+        return number;
+	}
+
+	public static <T extends Model> T rawQuerySingle(Class<? extends Model> type, String sql, String[] selectionArgs) {
+		List<T> entities = rawQuery(type, sql, selectionArgs);
+
+		if (entities.size() > 0) {
+			return entities.get(0);
+		}
+
+		return null;
+	}
+
+	// Database creation
+
+	public static ArrayList<String> createUniqueDefinition(TableInfo tableInfo) {
+		final ArrayList<String> definitions = new ArrayList<String>();
+		sUniqueGroupMap = new HashMap<String, List<String>>();
+		sOnUniqueConflictsMap = new HashMap<String, ConflictAction>();
+
+		for (Field field : tableInfo.getFields()) {
+			createUniqueColumnDefinition(tableInfo, field);
+		}
+
+		if (sUniqueGroupMap.isEmpty()) {
+			return definitions;
+		}
+
+		Set<String> keySet = sUniqueGroupMap.keySet();
+		for (String key : keySet) {
+			List<String> group = sUniqueGroupMap.get(key);
+			ConflictAction conflictAction = sOnUniqueConflictsMap.get(key);
+
+			definitions.add(String.format("UNIQUE (%s) ON CONFLICT %s",
+					TextUtils.join(", ", group), conflictAction.toString()));
+		}
+
+		return definitions;
+	}
+
+	public static void createUniqueColumnDefinition(TableInfo tableInfo, Field field) {
+		final String name = tableInfo.getColumnName(field);
+		final Column column = field.getAnnotation(Column.class);
+
+        if (field.getName().equals("mId")) {
+            return;
+        }
+
+		String[] groups = column.uniqueGroups();
+		ConflictAction[] conflictActions = column.onUniqueConflicts();
+		if (groups.length != conflictActions.length)
+			return;
+
+		for (int i = 0; i < groups.length; i++) {
+			String group = groups[i];
+			ConflictAction conflictAction = conflictActions[i];
+
+			if (TextUtils.isEmpty(group))
+				continue;
+
+			List<String> list = sUniqueGroupMap.get(group);
+			if (list == null) {
+				list = new ArrayList<String>();
+			}
+			list.add(name);
+
+			sUniqueGroupMap.put(group, list);
+			sOnUniqueConflictsMap.put(group, conflictAction);
+		}
+	}
+
+	public static String[] createIndexDefinition(TableInfo tableInfo) {
+		final ArrayList<String> definitions = new ArrayList<String>();
+		sIndexGroupMap = new HashMap<String, List<String>>();
+
+		for (Field field : tableInfo.getFields()) {
+			createIndexColumnDefinition(tableInfo, field);
+		}
+
+		if (sIndexGroupMap.isEmpty()) {
+			return new String[0];
+		}
+
+		for (Map.Entry<String, List<String>> entry : sIndexGroupMap.entrySet()) {
+			definitions.add(String.format("CREATE INDEX IF NOT EXISTS %s on %s(%s);",
+					"index_" + tableInfo.getTableName() + "_" + entry.getKey(),
+					tableInfo.getTableName(), TextUtils.join(", ", entry.getValue())));
+		}
+
+		return definitions.toArray(new String[definitions.size()]);
+	}
+
+	public static void createIndexColumnDefinition(TableInfo tableInfo, Field field) {
+		final String name = tableInfo.getColumnName(field);
+		final Column column = field.getAnnotation(Column.class);
+
+        if (field.getName().equals("mId")) {
+            return;
+        }
+
+		if (column.index()) {
+			List<String> list = new ArrayList<String>();
+			list.add(name);
+			sIndexGroupMap.put(name, list);
+		}
+
+		String[] groups = column.indexGroups();
+		for (String group : groups) {
+			if (TextUtils.isEmpty(group))
+				continue;
+
+			List<String> list = sIndexGroupMap.get(group);
+			if (list == null) {
+				list = new ArrayList<String>();
+			}
+
+			list.add(name);
+			sIndexGroupMap.put(group, list);
+		}
+	}
+
+	public static String createTableDefinition(TableInfo tableInfo) {
+		final ArrayList<String> definitions = new ArrayList<String>();
+
+		for (Field field : tableInfo.getFields()) {
+			String definition = createColumnDefinition(tableInfo, field);
+			if (!TextUtils.isEmpty(definition)) {
+				definitions.add(definition);
+			}
+		}
+
+		definitions.addAll(createUniqueDefinition(tableInfo));
+
+		return String.format("CREATE TABLE IF NOT EXISTS %s (%s);", tableInfo.getTableName(),
+				TextUtils.join(", ", definitions));
+	}
+
+	@SuppressWarnings("unchecked")
+	public static String createColumnDefinition(TableInfo tableInfo, Field field) {
+		StringBuilder definition = new StringBuilder();
+
+		Class<?> type = field.getType();
+		final String name = tableInfo.getColumnName(field);
+		final TypeSerializer typeSerializer = Cache.getParserForType(field.getType());
+		final Column column = field.getAnnotation(Column.class);
+
+		if (typeSerializer != null) {
+			type = typeSerializer.getSerializedType();
+		}
+
+		if (TYPE_MAP.containsKey(type)) {
+			definition.append(name);
+			definition.append(" ");
+			definition.append(TYPE_MAP.get(type).toString());
+		}
+		else if (ReflectionUtils.isModel(type)) {
+			definition.append(name);
+			definition.append(" ");
+			definition.append(SQLiteType.INTEGER.toString());
+		}
+		else if (ReflectionUtils.isSubclassOf(type, Enum.class)) {
+			definition.append(name);
+			definition.append(" ");
+			definition.append(SQLiteType.TEXT.toString());
+		}
+
+		if (!TextUtils.isEmpty(definition)) {
+
+			if (name.equals(tableInfo.getIdName())) {
+				definition.append(" PRIMARY KEY AUTOINCREMENT");
+			}else if(column!=null){
+				if (column.length() > -1) {
+					definition.append("(");
+					definition.append(column.length());
+					definition.append(")");
+				}
+
+				if (column.notNull()) {
+					definition.append(" NOT NULL ON CONFLICT ");
+					definition.append(column.onNullConflict().toString());
+				}
+
+				if (column.unique()) {
+					definition.append(" UNIQUE ON CONFLICT ");
+					definition.append(column.onUniqueConflict().toString());
+				}
+			}
+
+			if (FOREIGN_KEYS_SUPPORTED && ReflectionUtils.isModel(type)) {
+				definition.append(" REFERENCES ");
+				definition.append(Cache.getTableInfo((Class<? extends Model>) type).getTableName());
+				definition.append("("+tableInfo.getIdName()+")");
+				definition.append(" ON DELETE ");
+				definition.append(column.onDelete().toString().replace("_", " "));
+				definition.append(" ON UPDATE ");
+				definition.append(column.onUpdate().toString().replace("_", " "));
+			}
+		}
+		else {
+			Log.e("No type mapping for: " + type.toString());
+		}
+
+		return definition.toString();
+	}
+
+	@SuppressWarnings("unchecked")
+	public static <T extends Model> List<T> processCursor(Class<? extends Model> type, Cursor cursor) {
+		TableInfo tableInfo = Cache.getTableInfo(type);
+		String idName = tableInfo.getIdName();
+		final List<T> entities = new ArrayList<T>();
+
+		try {
+			Constructor<?> entityConstructor = type.getConstructor();
+
+			if (cursor.moveToFirst()) {
+                /**
+                 * Obtain the columns ordered to fix issue #106 (https://github.com/pardom/ActiveAndroid/issues/106)
+                 * when the cursor have multiple columns with same name obtained from join tables.
+                 */
+                List<String> columnsOrdered = new ArrayList<String>(Arrays.asList(cursor.getColumnNames()));
+				do {
+					Model entity = Cache.getEntity(type, cursor.getLong(columnsOrdered.indexOf(idName)));
+					if (entity == null) {
+						entity = (T) entityConstructor.newInstance();
+					}
+
+					entity.loadFromCursor(cursor);
+					entities.add((T) entity);
+				}
+				while (cursor.moveToNext());
+			}
+
+		}
+		catch (NoSuchMethodException e) {
+			throw new RuntimeException(
+                "Your model " + type.getName() + " does not define a default " +
+                "constructor. The default constructor is required for " +
+                "now in ActiveAndroid models, as the process to " +
+                "populate the ORM model is : " +
+                "1. instantiate default model " +
+                "2. populate fields"
+            );
+		}
+		catch (Exception e) {
+			Log.e("Failed to process cursor.", e);
+		}
+
+		return entities;
+	}
+
+	private static int processIntCursor(final Cursor cursor) {
+        if (cursor.moveToFirst()) {
+            return cursor.getInt(0);
+	    }
+        return 0;
+    }
+
+	public static List<String> lexSqlScript(String sqlScript) {
+		ArrayList<String> sl = new ArrayList<String>();
+		boolean inString = false, quoteNext = false;
+		StringBuilder b = new StringBuilder(100);
+
+		for (int i = 0; i < sqlScript.length(); i++) {
+			char c = sqlScript.charAt(i);
+
+			if (c == ';' && !inString && !quoteNext) {
+				sl.add(b.toString());
+				b = new StringBuilder(100);
+				inString = false;
+				quoteNext = false;
+				continue;
+			}
+
+			if (c == '\'' && !quoteNext) {
+				inString = !inString;
+			}
+
+			quoteNext = c == '\\' && !quoteNext;
+
+			b.append(c);
+		}
+
+		if (b.length() > 0) {
+			sl.add(b.toString());
+		}
+
+		return sl;
+	}
+}

app/src/main/java/com/activeandroid/util/SqlParser.java

@@ -0,0 +1,110 @@
+
+package com.activeandroid.util;
+
+/*
+ * Copyright (C) 2014 Markus Pfeiffer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class SqlParser {
+
+    public final static int STATE_NONE          = 0;
+    public final static int STATE_STRING        = 1;
+    public final static int STATE_COMMENT       = 2;
+    public final static int STATE_COMMENT_BLOCK = 3;
+
+    public static List<String> parse(final InputStream stream) throws IOException {
+
+        final BufferedInputStream buffer = new BufferedInputStream(stream);
+        final List<String> commands = new ArrayList<String>();
+        final StringBuffer sb = new StringBuffer();
+
+        try {
+            final Tokenizer tokenizer = new Tokenizer(buffer);
+            int state = STATE_NONE;
+
+            while (tokenizer.hasNext()) {
+                final char c = (char) tokenizer.next();
+
+                if (state == STATE_COMMENT_BLOCK) {
+                    if (tokenizer.skip("*/")) {
+                        state = STATE_NONE;
+                    }
+                    continue;
+
+                } else if (state == STATE_COMMENT) {
+                    if (isNewLine(c)) {
+                        state = STATE_NONE;
+                    }
+                    continue;
+
+                } else if (state == STATE_NONE && tokenizer.skip("/*")) {
+                    state = STATE_COMMENT_BLOCK;
+                    continue;
+
+                } else if (state == STATE_NONE && tokenizer.skip("--")) {
+                    state = STATE_COMMENT;
+                    continue;
+
+                } else if (state == STATE_NONE && c == ';') {
+                    final String command = sb.toString().trim();
+                    commands.add(command);
+                    sb.setLength(0);
+                    continue;
+
+                } else if (state == STATE_NONE && c == '\'') {
+                    state = STATE_STRING;
+
+                } else if (state == STATE_STRING && c == '\'') {
+                    state = STATE_NONE;
+
+                }
+
+                if (state == STATE_NONE || state == STATE_STRING) {
+                    if (state == STATE_NONE && isWhitespace(c)) {
+                        if (sb.length() > 0 && sb.charAt(sb.length() - 1) != ' ') {
+                            sb.append(' ');
+                        }
+                    } else {
+                        sb.append(c);
+                    }
+                }
+            }
+
+        } finally {
+            IOUtils.closeQuietly(buffer);
+        }
+
+        if (sb.length() > 0) {
+            commands.add(sb.toString().trim());
+        }
+
+        return commands;
+    }
+
+    private static boolean isNewLine(final char c) {
+        return c == '\r' || c == '\n';
+    }
+
+    private static boolean isWhitespace(final char c) {
+        return c == '\r' || c == '\n' || c == '\t' || c == ' ';
+    }
+}

app/src/main/java/com/activeandroid/util/Tokenizer.java

@@ -0,0 +1,76 @@
+
+package com.activeandroid.util;
+
+/*
+ * Copyright (C) 2014 Markus Pfeiffer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.IOException;
+import java.io.InputStream;
+
+
+public class Tokenizer {
+
+    private final InputStream mStream;
+
+    private boolean           mIsNext;
+    private int               mCurrent;
+
+    public Tokenizer(final InputStream in) {
+        this.mStream = in;
+    }
+
+    public boolean hasNext() throws IOException {
+
+        if (!this.mIsNext) {
+            this.mIsNext = true;
+            this.mCurrent = this.mStream.read();
+        }
+        return this.mCurrent != -1;
+    }
+
+    public int next() throws IOException {
+
+        if (!this.mIsNext) {
+            this.mCurrent = this.mStream.read();
+        }
+        this.mIsNext = false;
+        return this.mCurrent;
+    }
+
+    public boolean skip(final String s) throws IOException {
+
+        if (s == null || s.length() == 0) {
+            return false;
+        }
+
+        if (s.charAt(0) != this.mCurrent) {
+            return false;
+        }
+
+        final int len = s.length();
+        this.mStream.mark(len - 1);
+
+        for (int n = 1; n < len; n++) {
+            final int value = this.mStream.read();
+
+            if (value != s.charAt(n)) {
+                this.mStream.reset();
+                return false;
+            }
+        }
+        return true;
+    }
+}

app/src/main/java/com/activeandroid/widget/ModelAdapter.java

@@ -0,0 +1,57 @@
+package com.activeandroid.widget;
+
+import java.util.Collection;
+import java.util.List;
+
+import android.content.Context;
+import android.widget.ArrayAdapter;
+
+import com.activeandroid.Model;
+
+public class ModelAdapter<T extends Model> extends ArrayAdapter<T> {
+	public ModelAdapter(Context context, int textViewResourceId) {
+		super(context, textViewResourceId);
+	}
+
+	public ModelAdapter(Context context, int resource, int textViewResourceId) {
+		super(context, resource, textViewResourceId);
+	}
+
+	public ModelAdapter(Context context, int textViewResourceId, List<T> objects) {
+		super(context, textViewResourceId, objects);
+	}
+
+	public ModelAdapter(Context context, int resource, int textViewResourceId, List<T> objects) {
+		super(context, resource, textViewResourceId, objects);
+	}
+
+	/**
+	 * Clears the adapter and, if data != null, fills if with new Items.
+	 *
+	 * @param collection A Collection&lt;? extends T&gt; which members get added to the adapter.
+	 */
+	public void setData(Collection<? extends T> collection) {
+		clear();
+
+		if (collection != null) {
+			for (T item : collection) {
+				add(item);
+			}
+		}
+	}
+
+	/**
+	 * @return The Id of the record at position.
+	 */
+	@Override
+	public long getItemId(int position) {
+		T item = getItem(position);
+
+		if (item != null) {
+			return item.getId();
+		}
+		else {
+			return -1;
+		}
+	}
+}

app/src/main/java/org/isoron/uhabits/HabitsApplication.java

@@ -21,10 +21,10 @@ package org.isoron.uhabits;
 
 import android.app.*;
 import android.content.*;
-import android.support.annotation.*;
 
 import com.activeandroid.*;
 
+import org.isoron.uhabits.models.sqlite.*;
 import org.isoron.uhabits.notifications.*;
 import org.isoron.uhabits.preferences.*;
 import org.isoron.uhabits.tasks.*;
@@ -38,7 +38,7 @@ import java.io.*;
  */
 public class HabitsApplication extends Application
 {
-    private static Context context;
+    private Context context;
 
     private static AppComponent component;
 
@@ -58,26 +58,14 @@ public class HabitsApplication extends Application
         HabitsApplication.component = component;
     }
 
-    @NonNull
-    @Deprecated
-    public static Context getContext()
-    {
-        if (context == null) throw new RuntimeException("context is null");
-        return context;
-    }
-
     public static boolean isTestMode()
     {
         try
         {
-            if (context != null)
-            {
-                String testClass = "org.isoron.uhabits.BaseAndroidTest";
-                context.getClassLoader().loadClass(testClass);
-            }
+            Class.forName ("org.isoron.uhabits.BaseAndroidTest");
             return true;
         }
-        catch (final Exception e)
+        catch (final ClassNotFoundException e)
         {
             return false;
         }
@@ -87,7 +75,7 @@ public class HabitsApplication extends Application
     public void onCreate()
     {
         super.onCreate();
-        HabitsApplication.context = this;
+        context = this;
 
         component = DaggerAppComponent
             .builder()
@@ -96,11 +84,20 @@ public class HabitsApplication extends Application
 
         if (isTestMode())
         {
-            File db = DatabaseUtils.getDatabaseFile();
+            File db = DatabaseUtils.getDatabaseFile(context);
             if (db.exists()) db.delete();
         }
 
-        DatabaseUtils.initializeActiveAndroid();
+        try
+        {
+            DatabaseUtils.initializeActiveAndroid(context);
+        }
+        catch (InvalidDatabaseVersionException e)
+        {
+            File db = DatabaseUtils.getDatabaseFile(context);
+            db.renameTo(new File(db.getAbsolutePath() + ".invalid"));
+            DatabaseUtils.initializeActiveAndroid(context);
+        }
 
         widgetUpdater = component.getWidgetUpdater();
         widgetUpdater.startListening();
@@ -125,7 +122,7 @@ public class HabitsApplication extends Application
     @Override
     public void onTerminate()
     {
-        HabitsApplication.context = null;
+        context = null;
         ActiveAndroid.dispose();
 
         reminderScheduler.stopListening();

app/src/main/java/org/isoron/uhabits/activities/BaseScreen.java

@@ -40,6 +40,7 @@ import java.io.*;
 
 import static android.os.Build.VERSION.*;
 import static android.os.Build.VERSION_CODES.*;
+import static android.support.v4.content.FileProvider.*;
 
 /**
  * Base class for all screens in the application.
@@ -50,6 +51,8 @@ import static android.os.Build.VERSION_CODES.*;
  */
 public class BaseScreen
 {
+    public static final int REQUEST_CREATE_DOCUMENT = 1;
+
     protected BaseActivity activity;
 
     @Nullable
@@ -230,11 +233,14 @@ public class BaseScreen
 
     public void showSendFileScreen(@NonNull String archiveFilename)
     {
+        File file = new File(archiveFilename);
+        Uri fileUri = getUriForFile(activity, "org.isoron.uhabits", file);
+
         Intent intent = new Intent();
         intent.setAction(Intent.ACTION_SEND);
         intent.setType("application/zip");
-        intent.putExtra(Intent.EXTRA_STREAM,
-            Uri.fromFile(new File(archiveFilename)));
+        intent.putExtra(Intent.EXTRA_STREAM, fileUri);
+        intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
         activity.startActivity(intent);
     }
 

app/src/main/java/org/isoron/uhabits/activities/BaseSystem.java

@@ -70,7 +70,7 @@ public class BaseSystem
 
         if (context == null) throw new RuntimeException(
             "application context should not be null");
-        File dir = FileUtils.getFilesDir("Logs");
+        File dir = FileUtils.getFilesDir(context, "Logs");
         if (dir == null) throw new IOException("log dir should not be null");
 
         File logFile =

app/src/main/java/org/isoron/uhabits/activities/about/AboutRootView.java

@@ -25,7 +25,7 @@ import android.support.v7.widget.Toolbar;
 import android.widget.*;
 
 import org.isoron.uhabits.BuildConfig;
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.intents.*;
 import org.isoron.uhabits.utils.*;
@@ -94,6 +94,13 @@ public class AboutRootView extends BaseRootView
         getContext().startActivity(intent);
     }
 
+    @OnClick(R.id.tvTranslate)
+    public void onClickTranslate()
+    {
+        Intent intent = intents.helpTranslate(getContext());
+        getContext().startActivity(intent);
+    }
+
     @OnClick(R.id.tvRate)
     public void onClickRate()
     {

app/src/main/java/org/isoron/uhabits/activities/common/dialogs/ConfirmDeleteDialog.java

@@ -24,7 +24,7 @@ import android.support.v7.app.*;
 
 import com.google.auto.factory.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.*;
 
 import butterknife.*;

app/src/main/java/org/isoron/uhabits/activities/common/dialogs/HistoryEditorDialog.java

@@ -78,6 +78,8 @@ public class HistoryEditorDialog extends AppCompatDialogFragment
         {
             long id = savedInstanceState.getLong("habit", -1);
             if (id > 0) this.habit = habitList.getById(id);
+            historyChart.onRestoreInstanceState(
+                savedInstanceState.getParcelable("historyChart"));
         }
 
         int padding =
@@ -129,6 +131,7 @@ public class HistoryEditorDialog extends AppCompatDialogFragment
     public void onSaveInstanceState(Bundle outState)
     {
         outState.putLong("habit", habit.getId());
+        outState.putParcelable("historyChart", historyChart.onSaveInstanceState());
     }
 
     public void setController(@NonNull Controller controller)

app/src/main/java/org/isoron/uhabits/activities/common/views/BundleSavedState.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2017 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.activities.common.views;
+
+import android.os.*;
+import android.support.v4.os.*;
+
+public class BundleSavedState extends android.support.v4.view.AbsSavedState
+{
+    public static final Parcelable.Creator<BundleSavedState> CREATOR =
+        ParcelableCompat.newCreator(
+            new ParcelableCompatCreatorCallbacks<BundleSavedState>()
+            {
+                @Override
+                public BundleSavedState createFromParcel(Parcel source,
+                                                         ClassLoader loader)
+                {
+                    return new BundleSavedState(source, loader);
+                }
+
+                @Override
+                public BundleSavedState[] newArray(int size)
+                {
+                    return new BundleSavedState[size];
+                }
+            });
+
+    public final Bundle bundle;
+
+    public BundleSavedState(Parcelable superState, Bundle bundle)
+    {
+        super(superState);
+        this.bundle = bundle;
+    }
+
+    public BundleSavedState(Parcel source, ClassLoader loader)
+    {
+        super(source, loader);
+        this.bundle = source.readBundle(loader);
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags)
+    {
+        super.writeToParcel(out, flags);
+        out.writeBundle(bundle);
+    }
+}

app/src/main/java/org/isoron/uhabits/activities/common/views/FrequencyChart.java

@@ -256,7 +256,7 @@ public class FrequencyChart extends ScrollableChart
         float scale = 1.0f/maxFreq * value;
         float radius = maxRadius * scale;
 
-        int colorIndex = Math.round((colors.length-1) * scale);
+        int colorIndex = Math.min(colors.length - 1, Math.round((colors.length - 1) * scale));
         pGraph.setColor(colors[colorIndex]);
         canvas.drawCircle(rect.centerX(), rect.centerY(), radius, pGraph);
     }

app/src/main/java/org/isoron/uhabits/activities/common/views/HistoryChart.java

@@ -32,7 +32,8 @@ import org.isoron.uhabits.utils.*;
 import java.text.*;
 import java.util.*;
 
-import static org.isoron.uhabits.models.Checkmark.*;
+import static org.isoron.uhabits.models.Checkmark.CHECKED_EXPLICITLY;
+import static org.isoron.uhabits.models.Checkmark.UNCHECKED;
 
 public class HistoryChart extends ScrollableChart
 {
@@ -112,10 +113,21 @@ public class HistoryChart extends ScrollableChart
         if (!isEditable) return false;
 
         performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP);
+        float x, y;
 
+        try
+        {
             int pointerId = e.getPointerId(0);
-        float x = e.getX(pointerId);
-        float y = e.getY(pointerId);
+            x = e.getX(pointerId);
+            y = e.getY(pointerId);
+        }
+        catch (RuntimeException ex)
+        {
+            // Android often throws IllegalArgumentException here. Apparently,
+            // the pointer id may become invalid shortly after calling
+            // e.getPointerId.
+            return false;
+        }
 
         final Long timestamp = positionToTimestamp(x, y);
         if (timestamp == null) return false;

app/src/main/java/org/isoron/uhabits/activities/common/views/ScrollableChart.java

@@ -21,6 +21,7 @@ package org.isoron.uhabits.activities.common.views;
 
 import android.animation.*;
 import android.content.*;
+import android.os.*;
 import android.util.*;
 import android.view.*;
 import android.widget.*;
@@ -32,7 +33,9 @@ public abstract class ScrollableChart extends View
 
     private int dataOffset;
 
-    private int scrollerBucketSize;
+    private int scrollerBucketSize = 1;
+
+    private int direction = 1;
 
     private GestureDetector detector;
 
@@ -40,6 +43,10 @@ public abstract class ScrollableChart extends View
 
     private ValueAnimator scrollAnimator;
 
+    private ScrollController scrollController;
+
+    private int maxDataOffset = 10000;
+
     public ScrollableChart(Context context)
     {
         super(context);
@@ -63,8 +70,7 @@ public abstract class ScrollableChart extends View
         if (!scroller.isFinished())
         {
             scroller.computeScrollOffset();
-            dataOffset = Math.max(0, scroller.getCurrX() / scrollerBucketSize);
-            postInvalidate();
+            updateDataOffset();
         }
         else
         {
@@ -85,19 +91,50 @@ public abstract class ScrollableChart extends View
                            float velocityY)
     {
         scroller.fling(scroller.getCurrX(), scroller.getCurrY(),
-            (int) velocityX / 2, 0, 0, 100000, 0, 0);
+            direction * ((int) velocityX) / 2, 0, 0, getMaxX(), 0, 0);
         invalidate();
 
         scrollAnimator.setDuration(scroller.getDuration());
         scrollAnimator.start();
-
         return false;
     }
 
-    @Override
-    public void onLongPress(MotionEvent e)
+    private int getMaxX()
     {
+        return maxDataOffset * scrollerBucketSize;
+    }
 
+    @Override
+    public void onRestoreInstanceState(Parcelable state)
+    {
+        if(!(state instanceof BundleSavedState))
+        {
+            super.onRestoreInstanceState(state);
+            return;
+        }
+
+        BundleSavedState bss = (BundleSavedState) state;
+        int x = bss.bundle.getInt("x");
+        int y = bss.bundle.getInt("y");
+        direction = bss.bundle.getInt("direction");
+        dataOffset = bss.bundle.getInt("dataOffset");
+        maxDataOffset = bss.bundle.getInt("maxDataOffset");
+        scroller.startScroll(0, 0, x, y, 0);
+        scroller.computeScrollOffset();
+        super.onRestoreInstanceState(bss.getSuperState());
+    }
+
+    @Override
+    public Parcelable onSaveInstanceState()
+    {
+        Parcelable superState = super.onSaveInstanceState();
+        Bundle bundle = new Bundle();
+        bundle.putInt("x", scroller.getCurrX());
+        bundle.putInt("y", scroller.getCurrY());
+        bundle.putInt("dataOffset", dataOffset);
+        bundle.putInt("direction", direction);
+        bundle.putInt("maxDataOffset", maxDataOffset);
+        return new BundleSavedState(superState, bundle);
     }
 
     @Override
@@ -111,12 +148,14 @@ public abstract class ScrollableChart extends View
             if (parent != null) parent.requestDisallowInterceptTouchEvent(true);
         }
 
-        scroller.startScroll(scroller.getCurrX(), scroller.getCurrY(),
-            (int) -dx, (int) dy, 0);
-        scroller.computeScrollOffset();
-        dataOffset = Math.max(0, scroller.getCurrX() / scrollerBucketSize);
-        postInvalidate();
 
+        dx = - direction * dx;
+        dx = Math.min(dx, getMaxX() - scroller.getCurrX());
+        scroller.startScroll(scroller.getCurrX(), scroller.getCurrY(), (int) dx,
+            (int) dy, 0);
+
+        scroller.computeScrollOffset();
+        updateDataOffset();
         return true;
     }
 
@@ -138,6 +177,32 @@ public abstract class ScrollableChart extends View
         return detector.onTouchEvent(event);
     }
 
+    public void setDirection(int direction)
+    {
+        if (direction != 1 && direction != -1)
+            throw new IllegalArgumentException();
+        this.direction = direction;
+    }
+
+    @Override
+    public void onLongPress(MotionEvent e)
+    {
+
+    }
+
+    public void setMaxDataOffset(int maxDataOffset)
+    {
+        this.maxDataOffset = maxDataOffset;
+        this.dataOffset = Math.min(dataOffset, maxDataOffset);
+        scrollController.onDataOffsetChanged(this.dataOffset);
+        postInvalidate();
+    }
+
+    public void setScrollController(ScrollController scrollController)
+    {
+        this.scrollController = scrollController;
+    }
+
     public void setScrollerBucketSize(int scrollerBucketSize)
     {
         this.scrollerBucketSize = scrollerBucketSize;
@@ -149,5 +214,25 @@ public abstract class ScrollableChart extends View
         scroller = new Scroller(context, null, true);
         scrollAnimator = ValueAnimator.ofFloat(0, 1);
         scrollAnimator.addUpdateListener(this);
+        scrollController = new ScrollController() {};
+    }
+
+    private void updateDataOffset()
+    {
+        int newDataOffset = scroller.getCurrX() / scrollerBucketSize;
+        newDataOffset = Math.max(0, newDataOffset);
+        newDataOffset = Math.min(maxDataOffset, newDataOffset);
+
+        if (newDataOffset != dataOffset)
+        {
+            dataOffset = newDataOffset;
+            scrollController.onDataOffsetChanged(dataOffset);
+            postInvalidate();
+        }
+    }
+
+    public interface ScrollController
+    {
+        default void onDataOffsetChanged(int newDataOffset) {}
     }
 }

app/src/main/java/org/isoron/uhabits/activities/habits/edit/BaseDialog.java

@@ -28,6 +28,7 @@ import android.view.*;
 import com.android.datetimepicker.time.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.activities.common.dialogs.*;
 import org.isoron.uhabits.commands.*;
@@ -38,6 +39,8 @@ import java.util.*;
 
 import butterknife.*;
 
+import static org.isoron.uhabits.activities.ThemeSwitcher.*;
+
 public abstract class BaseDialog extends AppCompatDialogFragment
 {
     @Nullable
@@ -61,6 +64,18 @@ public abstract class BaseDialog extends AppCompatDialogFragment
 
     private ColorPickerDialogFactory colorPickerDialogFactory;
 
+    @Override
+    public int getTheme()
+    {
+        AppComponent component =
+            ((HabitsApplication) getContext().getApplicationContext()).getComponent();
+
+        if(component.getPreferences().getTheme() == THEME_LIGHT)
+            return R.style.DialogWithTitle;
+        else
+            return R.style.DarkDialogWithTitle;
+    }
+
     @Override
     public void onActivityCreated(Bundle savedInstanceState)
     {

app/src/main/java/org/isoron/uhabits/activities/habits/edit/BaseDialogHelper.java

@@ -24,7 +24,7 @@ import android.support.v4.app.*;
 import android.view.*;
 import android.widget.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.utils.*;
 

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsActivity.java

@@ -25,6 +25,7 @@ import org.isoron.uhabits.*;
 import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.activities.habits.list.model.*;
 import org.isoron.uhabits.preferences.*;
+import org.isoron.uhabits.utils.*;
 
 /**
  * Activity that allows the user to see and modify the list of habits.
@@ -43,6 +44,8 @@ public class ListHabitsActivity extends BaseActivity
 
     private Preferences prefs;
 
+    private MidnightTimer midnightTimer;
+
     public ListHabitsComponent getListHabitsComponent()
     {
         return component;
@@ -77,6 +80,8 @@ public class ListHabitsActivity extends BaseActivity
         screen.setSelectionMenu(selectionMenu);
         rootView.setController(controller, selectionMenu);
 
+        midnightTimer = component.getMidnightTimer();
+
         setScreen(screen);
         controller.onStartup();
     }
@@ -84,6 +89,7 @@ public class ListHabitsActivity extends BaseActivity
     @Override
     protected void onPause()
     {
+        midnightTimer.onPause();
         screen.onDettached();
         adapter.cancelRefresh();
         super.onPause();
@@ -95,6 +101,7 @@ public class ListHabitsActivity extends BaseActivity
         adapter.refresh();
         screen.onAttached();
         rootView.postInvalidate();
+        midnightTimer.onResume();
 
         if (prefs.getTheme() == ThemeSwitcher.THEME_DARK &&
             prefs.isPureBlackEnabled() != pureBlack)

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsComponent.java

@@ -23,13 +23,14 @@ import org.isoron.uhabits.*;
 import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.activities.habits.list.controllers.*;
 import org.isoron.uhabits.activities.habits.list.model.*;
+import org.isoron.uhabits.utils.*;
 
 import dagger.*;
 
 @ActivityScope
 @Component(modules = { ActivityModule.class },
            dependencies = { AppComponent.class })
-public interface ListHabitsComponent extends ActivityComponent
+public interface ListHabitsComponent
 {
     CheckmarkButtonControllerFactory getCheckmarkButtonControllerFactory();
 
@@ -44,4 +45,6 @@ public interface ListHabitsComponent extends ActivityComponent
     ListHabitsScreen getScreen();
 
     ListHabitsSelectionMenu getSelectionMenu();
+
+    MidnightTimer getMidnightTimer();
 }

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsController.java

@@ -41,6 +41,7 @@ import javax.inject.*;
 public class ListHabitsController
     implements HabitCardListController.HabitListener
 {
+
     @NonNull
     private final ListHabitsScreen screen;
 
@@ -70,6 +71,8 @@ public class ListHabitsController
 
     private ExportCSVTaskFactory exportCSVFactory;
 
+    private ExportDBTaskFactory exportDBFactory;
+
     @Inject
     public ListHabitsController(@NonNull BaseSystem system,
                                 @NonNull CommandRunner commandRunner,
@@ -82,7 +85,8 @@ public class ListHabitsController
                                 @NonNull WidgetUpdater widgetUpdater,
                                 @NonNull
                                 ImportDataTaskFactory importTaskFactory,
-                                @NonNull ExportCSVTaskFactory exportCSVFactory)
+                                @NonNull ExportCSVTaskFactory exportCSVFactory,
+                                @NonNull ExportDBTaskFactory exportDBFactory)
     {
         this.adapter = adapter;
         this.commandRunner = commandRunner;
@@ -95,6 +99,7 @@ public class ListHabitsController
         this.widgetUpdater = widgetUpdater;
         this.importTaskFactory = importTaskFactory;
         this.exportCSVFactory = exportCSVFactory;
+        this.exportDBFactory = exportDBFactory;
     }
 
     public void onExportCSV()
@@ -110,7 +115,7 @@ public class ListHabitsController
 
     public void onExportDB()
     {
-        taskRunner.execute(new ExportDBTask(filename -> {
+        taskRunner.execute(exportDBFactory.create(filename -> {
             if (filename != null) screen.showSendFileScreen(filename);
             else screen.showMessage(R.string.could_not_export);
         }));
@@ -128,7 +133,8 @@ public class ListHabitsController
         taskRunner.execute(() -> habitList.reorder(from, to));
     }
 
-    public void onImportData(@NonNull File file)
+    public void onImportData(@NonNull File file,
+                             @NonNull OnFinishedListener finishedListener)
     {
         taskRunner.execute(importTaskFactory.create(file, result -> {
             switch (result)
@@ -146,6 +152,8 @@ public class ListHabitsController
                     screen.showMessage(R.string.could_not_import);
                     break;
             }
+
+            finishedListener.onFinish();
         }));
     }
 
@@ -208,4 +216,9 @@ public class ListHabitsController
         prefs.updateLastHint(-1, DateUtils.getStartOfToday());
         screen.showIntroScreen();
     }
+
+    public interface OnFinishedListener
+    {
+        void onFinish();
+    }
 }

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsMenu.java

@@ -112,6 +112,22 @@ public class ListHabitsMenu extends BaseMenu
                 invalidate();
                 return true;
 
+            case R.id.actionSortColor:
+                adapter.setOrder(HabitList.Order.BY_COLOR);
+                return true;
+
+            case R.id.actionSortManual:
+                adapter.setOrder(HabitList.Order.BY_POSITION);
+                return true;
+
+            case R.id.actionSortName:
+                adapter.setOrder(HabitList.Order.BY_NAME);
+                return true;
+
+            case R.id.actionSortScore:
+                adapter.setOrder(HabitList.Order.BY_SCORE);
+                return true;
+
             default:
                 return false;
         }

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsRootView.java

@@ -26,8 +26,9 @@ import android.support.v7.widget.Toolbar;
 import android.view.*;
 import android.widget.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.*;
+import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.activities.habits.list.controllers.*;
 import org.isoron.uhabits.activities.habits.list.model.*;
 import org.isoron.uhabits.activities.habits.list.views.*;
@@ -43,7 +44,7 @@ import butterknife.*;
 public class ListHabitsRootView extends BaseRootView
     implements ModelObservable.Listener, TaskRunner.Listener
 {
-    public static final int MAX_CHECKMARK_COUNT = 21;
+    public static final int MAX_CHECKMARK_COUNT = 60;
 
     @BindView(R.id.listView)
     HabitCardListView listView;
@@ -132,6 +133,13 @@ public class ListHabitsRootView extends BaseRootView
         listController.setSelectionListener(menu);
         listView.setController(listController);
         menu.setListController(listController);
+        header.setScrollController(new ScrollableChart.ScrollController() {
+            @Override
+            public void onDataOffsetChanged(int newDataOffset)
+            {
+                listView.setDataOffset(newDataOffset);
+            }
+        });
     }
 
     @Override
@@ -156,6 +164,7 @@ public class ListHabitsRootView extends BaseRootView
     {
         int count = getCheckmarkCount();
         header.setButtonCount(count);
+        header.setMaxDataOffset(Math.max(MAX_CHECKMARK_COUNT - count, 0));
         listView.setCheckmarkCount(count);
         super.onSizeChanged(w, h, oldw, oldh);
     }

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsScreen.java

@@ -19,7 +19,9 @@
 
 package org.isoron.uhabits.activities.habits.list;
 
+import android.app.*;
 import android.content.*;
+import android.net.*;
 import android.support.annotation.*;
 
 import org.isoron.uhabits.*;
@@ -31,24 +33,32 @@ import org.isoron.uhabits.commands.*;
 import org.isoron.uhabits.intents.*;
 import org.isoron.uhabits.io.*;
 import org.isoron.uhabits.models.*;
+import org.isoron.uhabits.utils.*;
 
 import java.io.*;
 
 import javax.inject.*;
 
+import static android.os.Build.VERSION.*;
+import static android.os.Build.VERSION_CODES.*;
+
 @ActivityScope
 public class ListHabitsScreen extends BaseScreen
     implements CommandRunner.Listener
 {
-    public static final int RESULT_BUG_REPORT = 4;
+    public static final int RESULT_IMPORT_DATA = 1;
 
     public static final int RESULT_EXPORT_CSV = 2;
 
     public static final int RESULT_EXPORT_DB = 3;
 
+    public static final int RESULT_BUG_REPORT = 4;
+
     public static final int RESULT_REPAIR_DB = 5;
 
-    public static final int RESULT_IMPORT_DATA = 1;
+    public static final int REQUEST_OPEN_DOCUMENT = 6;
+
+    public static final int REQUEST_SETTINGS = 7;
 
     @Nullable
     private ListHabitsController controller;
@@ -125,6 +135,15 @@ public class ListHabitsScreen extends BaseScreen
 
     @Override
     public void onResult(int requestCode, int resultCode, Intent data)
+    {
+        if (requestCode == REQUEST_OPEN_DOCUMENT)
+            onOpenDocumentResult(resultCode, data);
+
+        if (requestCode == REQUEST_SETTINGS)
+            onSettingsResult(resultCode);
+    }
+
+    private void onSettingsResult(int resultCode)
     {
         if (controller == null) return;
 
@@ -152,6 +171,30 @@ public class ListHabitsScreen extends BaseScreen
         }
     }
 
+    private void onOpenDocumentResult(int resultCode, Intent data)
+    {
+        if (controller == null) return;
+        if (resultCode != Activity.RESULT_OK) return;
+
+        try
+        {
+            Uri uri = data.getData();
+            ContentResolver cr = activity.getContentResolver();
+            InputStream is = cr.openInputStream(uri);
+
+            File cacheDir = activity.getExternalCacheDir();
+            File tempFile = File.createTempFile("import", "", cacheDir);
+
+            FileUtils.copy(is, tempFile);
+            controller.onImportData(tempFile, () -> tempFile.delete());
+        }
+        catch (IOException e)
+        {
+            showMessage(R.string.could_not_import);
+            e.printStackTrace();
+        }
+    }
+
     public void setController(@Nullable ListHabitsController controller)
     {
         this.controller = controller;
@@ -208,6 +251,21 @@ public class ListHabitsScreen extends BaseScreen
     }
 
     public void showImportScreen()
+    {
+        if (SDK_INT < KITKAT)
+        {
+            showImportScreenPreKitKat();
+            return;
+        }
+
+        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+        intent.setType("*/*");
+
+        activity.startActivityForResult(intent, REQUEST_OPEN_DOCUMENT);
+    }
+
+    public void showImportScreenPreKitKat()
     {
         File dir = dirFinder.findStorageDir(null);
 
@@ -220,7 +278,8 @@ public class ListHabitsScreen extends BaseScreen
         FilePickerDialog picker = filePickerDialogFactory.create(dir);
 
         if (controller != null)
-            picker.setListener(file -> controller.onImportData(file));
+            picker.setListener(file -> controller.onImportData(file, () -> {}));
+
         activity.showDialog(picker.getDialog());
     }
 
@@ -233,7 +292,7 @@ public class ListHabitsScreen extends BaseScreen
     public void showSettingsScreen()
     {
         Intent intent = intentFactory.startSettingsActivity(activity);
-        activity.startActivityForResult(intent, 0);
+        activity.startActivityForResult(intent, REQUEST_SETTINGS);
     }
 
     public void toggleNightMode()

app/src/main/java/org/isoron/uhabits/activities/habits/list/model/HabitCardListAdapter.java

@@ -27,6 +27,8 @@ import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.activities.habits.list.*;
 import org.isoron.uhabits.activities.habits.list.views.*;
 import org.isoron.uhabits.models.*;
+import org.isoron.uhabits.preferences.*;
+import org.isoron.uhabits.utils.*;
 
 import java.util.*;
 
@@ -41,7 +43,7 @@ import javax.inject.*;
 @ActivityScope
 public class HabitCardListAdapter
     extends RecyclerView.Adapter<HabitCardViewHolder>
-    implements HabitCardListCache.Listener
+    implements HabitCardListCache.Listener, MidnightTimer.MidnightListener
 {
     @NonNull
     private ModelObservable observable;
@@ -55,19 +57,36 @@ public class HabitCardListAdapter
     @NonNull
     private final HabitCardListCache cache;
 
+    @NonNull
+    private Preferences preferences;
+
+    private final MidnightTimer midnightTimer;
+
     @Inject
-    public HabitCardListAdapter(@NonNull HabitCardListCache cache)
+    public HabitCardListAdapter(@NonNull HabitCardListCache cache,
+                                @NonNull Preferences preferences,
+                                @NonNull MidnightTimer midnightTimer)
     {
+        this.preferences = preferences;
         this.selected = new LinkedList<>();
         this.observable = new ModelObservable();
         this.cache = cache;
 
+        this.midnightTimer = midnightTimer;
+
         cache.setListener(this);
         cache.setCheckmarkCount(ListHabitsRootView.MAX_CHECKMARK_COUNT);
+        cache.setOrder(preferences.getDefaultOrder());
 
         setHasStableIds(true);
     }
 
+    @Override
+    public void atMidnight()
+    {
+        cache.refreshAllHabits();
+    }
+
     public void cancelRefresh()
     {
         cache.cancelTasks();
@@ -86,11 +105,10 @@ public class HabitCardListAdapter
      * Returns the item that occupies a certain position on the list
      *
      * @param position position of the item
-     * @return the item at given position
-     * @throws IndexOutOfBoundsException if position is not valid
+     * @return the item at given position or null if position is invalid
      */
     @Deprecated
-    @NonNull
+    @Nullable
     public Habit getItem(int position)
     {
         return cache.getHabitByPosition(position);
@@ -130,12 +148,18 @@ public class HabitCardListAdapter
         return selected.isEmpty();
     }
 
+    public boolean isSortable()
+    {
+        return cache.getOrder() == HabitList.Order.BY_POSITION;
+    }
+
     /**
      * Notify the adapter that it has been attached to a ListView.
      */
     public void onAttached()
     {
         cache.onAttached();
+        midnightTimer.addListener(this);
     }
 
     @Override
@@ -153,6 +177,20 @@ public class HabitCardListAdapter
         listView.bindCardView(holder, habit, score, checkmarks, selected);
     }
 
+    @Override
+    public void onViewAttachedToWindow(@Nullable HabitCardViewHolder holder)
+    {
+        if (listView == null) return;
+        listView.attachCardView(holder);
+    }
+
+    @Override
+    public void onViewDetachedFromWindow(@Nullable HabitCardViewHolder holder)
+    {
+        if (listView == null) return;
+        listView.detachCardView(holder);
+    }
+
     @Override
     public HabitCardViewHolder onCreateViewHolder(ViewGroup parent,
                                                   int viewType)
@@ -168,6 +206,7 @@ public class HabitCardListAdapter
     public void onDetached()
     {
         cache.onDetached();
+        midnightTimer.removeListener(this);
     }
 
     @Override
@@ -260,6 +299,12 @@ public class HabitCardListAdapter
         this.listView = listView;
     }
 
+    public void setOrder(HabitList.Order order)
+    {
+        cache.setOrder(order);
+        preferences.setDefaultOrder(order);
+    }
+
     /**
      * Selects or deselects the item at a given position.
      *
@@ -268,6 +313,8 @@ public class HabitCardListAdapter
     public void toggleSelection(int position)
     {
         Habit h = getItem(position);
+        if (h == null) return;
+
         int k = selected.indexOf(h);
         if (k < 0) selected.add(h);
         else selected.remove(h);

app/src/main/java/org/isoron/uhabits/activities/habits/list/model/HabitCardListCache.java

@@ -93,12 +93,12 @@ public class HabitCardListCache implements CommandRunner.Listener
      * Returns the habits that occupies a certain position on the list.
      *
      * @param position the position of the habit
-     * @return the habit at given position
-     * @throws IndexOutOfBoundsException if position is not valid
+     * @return the habit at given position or null if position is invalid
      */
-    @NonNull
-    public Habit getHabitByPosition(int position)
+    @Nullable
+    public synchronized Habit getHabitByPosition(int position)
     {
+        if(position < 0 || position >= data.habits.size()) return null;
         return data.habits.get(position);
     }
 
@@ -107,6 +107,11 @@ public class HabitCardListCache implements CommandRunner.Listener
         return data.habits.size();
     }
 
+    public HabitList.Order getOrder()
+    {
+        return filteredHabits.getOrder();
+    }
+
     public int getScore(long habitId)
     {
         return data.scores.get(habitId);
@@ -180,6 +185,13 @@ public class HabitCardListCache implements CommandRunner.Listener
         this.listener = listener;
     }
 
+    public void setOrder(HabitList.Order order)
+    {
+        allHabits.setOrder(order);
+        filteredHabits.setOrder(order);
+        refreshAllHabits();
+    }
+
     /**
      * Interface definition for a callback to be invoked when the data on the
      * cache has been modified.

app/src/main/java/org/isoron/uhabits/activities/habits/list/views/CheckmarkButtonView.java

@@ -20,21 +20,34 @@
 package org.isoron.uhabits.activities.habits.list.views;
 
 import android.content.*;
+import android.content.res.*;
+import android.graphics.*;
+import android.support.annotation.*;
+import android.text.*;
+import android.util.*;
 import android.view.*;
-import android.widget.*;
 
 import org.isoron.uhabits.*;
 import org.isoron.uhabits.activities.habits.list.controllers.*;
-import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.utils.*;
 
-public class CheckmarkButtonView extends TextView
+import static android.view.View.MeasureSpec.*;
+import static org.isoron.uhabits.models.Checkmark.*;
+import static org.isoron.uhabits.utils.AttributeSetUtils.*;
+
+public class CheckmarkButtonView extends View
 {
     private int color;
 
     private int value;
 
-    private StyledResources res;
+    private StyledResources styledRes;
+
+    private TextPaint paint;
+
+    private int lowContrastColor;
+
+    private RectF rect;
 
     public CheckmarkButtonView(Context context)
     {
@@ -42,6 +55,21 @@ public class CheckmarkButtonView extends TextView
         init();
     }
 
+    public CheckmarkButtonView(@Nullable Context ctx, @Nullable AttributeSet attrs)
+    {
+        super(ctx, attrs);
+        init();
+
+        if(ctx == null) throw new IllegalStateException();
+        if(attrs == null) throw new IllegalStateException();
+
+        int paletteColor = getIntAttribute(ctx, attrs, "color", 0);
+        setColor(ColorUtils.getAndroidTestColor(paletteColor));
+
+        int value = getIntAttribute(ctx, attrs, "value", 0);
+        setValue(value);
+    }
+
     public void setColor(int color)
     {
         this.color = color;
@@ -57,55 +85,60 @@ public class CheckmarkButtonView extends TextView
     public void setValue(int value)
     {
         this.value = value;
-        updateText();
+        postInvalidate();
     }
 
     public void toggle()
     {
-        value = (value == Checkmark.CHECKED_EXPLICITLY ? Checkmark.UNCHECKED :
-                     Checkmark.CHECKED_EXPLICITLY);
-
+        value = (value == CHECKED_EXPLICITLY ? UNCHECKED : CHECKED_EXPLICITLY);
         performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
-        updateText();
+        postInvalidate();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas)
+    {
+        super.onDraw(canvas);
+        Resources resources = getResources();
+
+        paint.setColor(value == CHECKED_EXPLICITLY ? color : lowContrastColor);
+        int id = (value == UNCHECKED ? R.string.fa_times : R.string.fa_check);
+        String label = resources.getString(id);
+        float em = paint.measureText("m");
+
+        rect.set(0, 0, getWidth(), getHeight());
+        rect.offset(0, 0.4f * em);
+        canvas.drawText(label, rect.centerX(), rect.centerY(), paint);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
+    {
+        Resources res = getResources();
+        int height = res.getDimensionPixelSize(R.dimen.checkmarkHeight);
+        int width = res.getDimensionPixelSize(R.dimen.checkmarkWidth);
+
+        widthMeasureSpec = makeMeasureSpec(width, EXACTLY);
+        heightMeasureSpec = makeMeasureSpec(height, EXACTLY);
+
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
     }
 
     private void init()
     {
-        res = new StyledResources(getContext());
-
-        setWillNotDraw(false);
-        setHapticFeedbackEnabled(false);
-
-        setMinHeight(
-            getResources().getDimensionPixelSize(R.dimen.checkmarkHeight));
-        setMinWidth(
-            getResources().getDimensionPixelSize(R.dimen.checkmarkWidth));
-
         setFocusable(false);
-        setGravity(Gravity.CENTER);
-        setTypeface(InterfaceUtils.getFontAwesome(getContext()));
-    }
 
-    private void updateText()
-    {
-        int lowContrastColor = res.getColor(R.attr.lowContrastTextColor);
+        Resources res = getResources();
+        styledRes = new StyledResources(getContext());
 
-        if (value == Checkmark.CHECKED_EXPLICITLY)
-        {
-            setText(R.string.fa_check);
-            setTextColor(color);
-        }
+        paint = new TextPaint();
+        paint.setTypeface(InterfaceUtils.getFontAwesome(getContext()));
+        paint.setAntiAlias(true);
+        paint.setTextAlign(Paint.Align.CENTER);
+        paint.setTextSize(res.getDimension(R.dimen.regularTextSize));
 
-        if (value == Checkmark.CHECKED_IMPLICITLY)
-        {
-            setText(R.string.fa_check);
-            setTextColor(lowContrastColor);
-        }
-
-        if (value == Checkmark.UNCHECKED)
-        {
-            setText(R.string.fa_times);
-            setTextColor(lowContrastColor);
-        }
+        rect = new RectF();
+        color = ColorUtils.getAndroidTestColor(0);
+        lowContrastColor = styledRes.getColor(R.attr.lowContrastTextColor);
     }
 }

app/src/main/java/org/isoron/uhabits/activities/habits/list/views/CheckmarkPanelView.java

@@ -53,6 +53,8 @@ public class CheckmarkPanelView extends LinearLayout implements Preferences.List
     @NonNull
     private Habit habit;
 
+    private int dataOffset;
+
     public CheckmarkPanelView(Context context)
     {
         super(context);
@@ -75,19 +77,23 @@ public class CheckmarkPanelView extends LinearLayout implements Preferences.List
         return (CheckmarkButtonView) getChildAt(position);
     }
 
-    public void setCheckmarkValues(int[] checkmarkValues)
+    public void setButtonCount(int newButtonCount)
     {
-        this.checkmarkValues = checkmarkValues;
-
-        if (this.nButtons != checkmarkValues.length)
+        if(nButtons != newButtonCount)
         {
-            this.nButtons = checkmarkValues.length;
+            nButtons = newButtonCount;
             addCheckmarkButtons();
         }
 
         setupCheckmarkButtons();
     }
 
+    public void setCheckmarkValues(int[] checkmarkValues)
+    {
+        this.checkmarkValues = checkmarkValues;
+        setupCheckmarkButtons();
+    }
+
     public void setColor(int color)
     {
         this.color = color;
@@ -100,6 +106,12 @@ public class CheckmarkPanelView extends LinearLayout implements Preferences.List
         setupCheckmarkButtons();
     }
 
+    public void setDataOffset(int dataOffset)
+    {
+        this.dataOffset = dataOffset;
+        setupCheckmarkButtons();
+    }
+
     public void setHabit(@NonNull Habit habit)
     {
         this.habit = habit;
@@ -170,11 +182,13 @@ public class CheckmarkPanelView extends LinearLayout implements Preferences.List
     {
         long timestamp = DateUtils.getStartOfToday();
         long day = DateUtils.millisecondsInOneDay;
+        timestamp -= day * dataOffset;
 
         for (int i = 0; i < nButtons; i++)
         {
             CheckmarkButtonView buttonView = indexToButton(i);
-            buttonView.setValue(checkmarkValues[i]);
+            if(i + dataOffset >= checkmarkValues.length) break;
+            buttonView.setValue(checkmarkValues[i + dataOffset]);
             buttonView.setColor(color);
             setupButtonControllers(timestamp, buttonView);
             timestamp -= day;

app/src/main/java/org/isoron/uhabits/activities/habits/list/views/HabitCardListView.java

@@ -20,15 +20,17 @@
 package org.isoron.uhabits.activities.habits.list.views;
 
 import android.content.*;
+import android.os.*;
 import android.support.annotation.*;
 import android.support.v7.widget.*;
 import android.support.v7.widget.helper.*;
 import android.util.*;
 import android.view.*;
 
-import org.isoron.uhabits.models.*;
+import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.activities.habits.list.controllers.*;
 import org.isoron.uhabits.activities.habits.list.model.*;
+import org.isoron.uhabits.models.*;
 
 import java.util.*;
 
@@ -44,6 +46,10 @@ public class HabitCardListView extends RecyclerView
 
     private int checkmarkCount;
 
+    private int dataOffset;
+
+    private LinkedList<HabitCardViewHolder> attachedHolders;
+
     public HabitCardListView(Context context, AttributeSet attrs)
     {
         super(context, attrs);
@@ -54,6 +60,13 @@ public class HabitCardListView extends RecyclerView
         TouchHelperCallback callback = new TouchHelperCallback();
         touchHelper = new ItemTouchHelper(callback);
         touchHelper.attachToRecyclerView(this);
+
+        attachedHolders = new LinkedList<>();
+    }
+
+    public void attachCardView(HabitCardViewHolder holder)
+    {
+        attachedHolders.add(holder);
     }
 
     /**
@@ -75,13 +88,12 @@ public class HabitCardListView extends RecyclerView
                              int[] checkmarks,
                              boolean selected)
     {
-        int visibleCheckmarks[] =
-            Arrays.copyOfRange(checkmarks, 0, checkmarkCount);
-
         HabitCardView cardView = (HabitCardView) holder.itemView;
         cardView.setHabit(habit);
         cardView.setSelected(selected);
-        cardView.setCheckmarkValues(visibleCheckmarks);
+        cardView.setCheckmarkValues(checkmarks);
+        cardView.setCheckmarkCount(checkmarkCount);
+        cardView.setDataOffset(dataOffset);
         cardView.setScore(score);
         if (controller != null) setupCardViewController(holder);
         return cardView;
@@ -92,6 +104,11 @@ public class HabitCardListView extends RecyclerView
         return new HabitCardView(getContext());
     }
 
+    public void detachCardView(HabitCardViewHolder holder)
+    {
+        attachedHolders.remove(holder);
+    }
+
     @Override
     public void setAdapter(RecyclerView.Adapter adapter)
     {
@@ -109,6 +126,16 @@ public class HabitCardListView extends RecyclerView
         this.controller = controller;
     }
 
+    public void setDataOffset(int dataOffset)
+    {
+        this.dataOffset = dataOffset;
+        for (HabitCardViewHolder holder : attachedHolders)
+        {
+            HabitCardView cardView = (HabitCardView) holder.itemView;
+            cardView.setDataOffset(dataOffset);
+        }
+    }
+
     @Override
     protected void onAttachedToWindow()
     {
@@ -123,6 +150,29 @@ public class HabitCardListView extends RecyclerView
         super.onDetachedFromWindow();
     }
 
+    @Override
+    protected void onRestoreInstanceState(Parcelable state)
+    {
+        if(!(state instanceof BundleSavedState))
+        {
+            super.onRestoreInstanceState(state);
+            return;
+        }
+
+        BundleSavedState bss = (BundleSavedState) state;
+        dataOffset = bss.bundle.getInt("dataOffset");
+        super.onRestoreInstanceState(bss.getSuperState());
+    }
+
+    @Override
+    protected Parcelable onSaveInstanceState()
+    {
+        Parcelable superState = super.onSaveInstanceState();
+        Bundle bundle = new Bundle();
+        bundle.putInt("dataOffset", dataOffset);
+        return new BundleSavedState(superState, bundle);
+    }
+
     protected void setupCardViewController(@NonNull HabitCardViewHolder holder)
     {
         HabitCardView cardView = (HabitCardView) holder.itemView;
@@ -168,7 +218,7 @@ public class HabitCardListView extends RecyclerView
         {
             int position = holder.getAdapterPosition();
             if (controller != null) controller.onItemLongClick(position);
-            touchHelper.startDrag(holder);
+            if (adapter.isSortable()) touchHelper.startDrag(holder);
         }
 
         @Override

app/src/main/java/org/isoron/uhabits/activities/habits/list/views/HabitCardView.java

@@ -27,7 +27,7 @@ import android.support.annotation.*;
 import android.util.*;
 import android.widget.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.utils.*;
@@ -72,6 +72,8 @@ public class HabitCardView extends FrameLayout
     @Nullable
     private Habit habit;
 
+    private int dataOffset;
+
     public HabitCardView(Context context)
     {
         super(context);
@@ -90,6 +92,11 @@ public class HabitCardView extends FrameLayout
         new Handler(Looper.getMainLooper()).post(() -> refresh());
     }
 
+    public void setCheckmarkCount(int checkmarkCount)
+    {
+        checkmarkPanel.setButtonCount(checkmarkCount);
+    }
+
     public void setCheckmarkValues(int checkmarks[])
     {
         checkmarkPanel.setCheckmarkValues(checkmarks);
@@ -103,6 +110,12 @@ public class HabitCardView extends FrameLayout
         checkmarkPanel.setController(controller);
     }
 
+    public void setDataOffset(int dataOffset)
+    {
+        this.dataOffset = dataOffset;
+        checkmarkPanel.setDataOffset(dataOffset);
+    }
+
     public void setHabit(@NonNull Habit habit)
     {
         if (this.habit != null) detachFromHabit();
@@ -130,12 +143,13 @@ public class HabitCardView extends FrameLayout
         updateBackground(isSelected);
     }
 
-    public void triggerRipple(long timestamp)
+    public synchronized void triggerRipple(long timestamp)
     {
         long today = DateUtils.getStartOfToday();
         long day = DateUtils.millisecondsInOneDay;
-        int offset = (int) ((today - timestamp) / day);
+        int offset = (int) ((today - timestamp) / day) - dataOffset;
         CheckmarkButtonView button = checkmarkPanel.indexToButton(offset);
+        if (button == null) return;
 
         float y = button.getHeight() / 2.0f;
         float x = checkmarkPanel.getX() + button.getX() + button.getWidth() / 2;
@@ -201,6 +215,7 @@ public class HabitCardView extends FrameLayout
         scoreRing.setPercentage(rand.nextFloat());
         checkmarkPanel.setColor(color);
         checkmarkPanel.setCheckmarkValues(values);
+        checkmarkPanel.setButtonCount(5);
     }
 
     private void refresh()

app/src/main/java/org/isoron/uhabits/activities/habits/list/views/HeaderView.java

@@ -20,30 +20,39 @@
 package org.isoron.uhabits.activities.habits.list.views;
 
 import android.content.*;
+import android.content.res.*;
+import android.graphics.*;
 import android.support.annotation.*;
+import android.text.*;
 import android.util.*;
-import android.view.*;
-import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.activities.common.views.*;
+import org.isoron.uhabits.activities.habits.list.*;
 import org.isoron.uhabits.preferences.*;
 import org.isoron.uhabits.utils.*;
 
 import java.util.*;
 
-public class HeaderView extends LinearLayout implements Preferences.Listener
+public class HeaderView extends ScrollableChart
+    implements Preferences.Listener, MidnightTimer.MidnightListener
 {
-    private final Context context;
 
     private int buttonCount;
 
     @Nullable
     private Preferences prefs;
 
+    @Nullable
+    private MidnightTimer midnightTimer;
+
+    private final TextPaint paint;
+
+    private RectF rect;
+
     public HeaderView(Context context, AttributeSet attrs)
     {
         super(context, attrs);
-        this.context = context;
 
         if (isInEditMode())
         {
@@ -56,51 +65,116 @@ public class HeaderView extends LinearLayout implements Preferences.Listener
             HabitsApplication app = (HabitsApplication) appContext;
             prefs = app.getComponent().getPreferences();
         }
+
+        if (context instanceof ListHabitsActivity)
+        {
+            ListHabitsActivity activity = (ListHabitsActivity) context;
+            midnightTimer = activity.getListHabitsComponent().getMidnightTimer();
+        }
+
+        Resources res = context.getResources();
+        setScrollerBucketSize((int) res.getDimension(R.dimen.checkmarkWidth));
+
+        StyledResources sr = new StyledResources(context);
+        paint = new TextPaint();
+        paint.setColor(Color.BLACK);
+        paint.setAntiAlias(true);
+        paint.setTextSize(getResources().getDimension(R.dimen.tinyTextSize));
+        paint.setTextAlign(Paint.Align.CENTER);
+        paint.setTypeface(Typeface.DEFAULT_BOLD);
+        paint.setColor(sr.getColor(R.attr.mediumContrastTextColor));
+
+        rect = new RectF();
+    }
+
+    @Override
+    public void atMidnight()
+    {
+        post(() -> invalidate());
     }
 
     @Override
     public void onCheckmarkOrderChanged()
     {
-        createButtons();
+        updateDirection();
+        postInvalidate();
     }
 
     public void setButtonCount(int buttonCount)
     {
         this.buttonCount = buttonCount;
-        createButtons();
+        postInvalidate();
     }
 
     @Override
     protected void onAttachedToWindow()
     {
+        updateDirection();
         super.onAttachedToWindow();
         if (prefs != null) prefs.addListener(this);
+        if (midnightTimer != null) midnightTimer.addListener(this);
+    }
+
+    private void updateDirection()
+    {
+        int direction = -1;
+        if (shouldReverseCheckmarks()) direction *= -1;
+        if (InterfaceUtils.isLayoutRtl(this)) direction *= -1;
+        setDirection(direction);
     }
 
     @Override
     protected void onDetachedFromWindow()
     {
+        if (midnightTimer != null) midnightTimer.removeListener(this);
         if (prefs != null) prefs.removeListener(this);
         super.onDetachedFromWindow();
     }
 
-    private void createButtons()
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
     {
-        removeAllViews();
+        int width = MeasureSpec.getSize(widthMeasureSpec);
+        int height = (int) getContext()
+            .getResources()
+            .getDimension(R.dimen.checkmarkHeight);
+        setMeasuredDimension(width, height);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas)
+    {
+        super.onDraw(canvas);
+
         GregorianCalendar day = DateUtils.getStartOfTodayCalendar();
+        Resources res = getContext().getResources();
+        float width = res.getDimension(R.dimen.checkmarkWidth);
+        float height = res.getDimension(R.dimen.checkmarkHeight);
+        boolean reverse = shouldReverseCheckmarks();
+        boolean isRtl = InterfaceUtils.isLayoutRtl(this);
+
+        day.add(GregorianCalendar.DAY_OF_MONTH, -getDataOffset());
+        float em = paint.measureText("m");
 
         for (int i = 0; i < buttonCount; i++)
-            addView(
-                inflate(context, R.layout.list_habits_header_checkmark, null));
-
-        for (int i = 0; i < getChildCount(); i++)
         {
-            int position = i;
-            if (shouldReverseCheckmarks()) position = getChildCount() - i - 1;
+            rect.set(0, 0, width, height);
+            rect.offset(canvas.getWidth(), 0);
 
-            View button = getChildAt(position);
-            TextView label = (TextView) button.findViewById(R.id.tvCheck);
-            label.setText(DateUtils.formatHeaderDate(day));
+            if(reverse) rect.offset(- (i + 1) * width, 0);
+            else rect.offset((i - buttonCount) * width, 0);
+
+            if (isRtl) rect.set(canvas.getWidth() - rect.right, rect.top,
+                canvas.getWidth() - rect.left, rect.bottom);
+
+            String text = DateUtils.formatHeaderDate(day).toUpperCase();
+            String[] lines = text.split("\n");
+
+            int y1 = (int)(rect.centerY() - 0.25 * em);
+            int y2 = (int)(rect.centerY() + 1.25 * em);
+
+            canvas.drawText(lines[0], rect.centerX(), y1, paint);
+            canvas.drawText(lines[1], rect.centerX(), y2, paint);
             day.add(GregorianCalendar.DAY_OF_MONTH, -1);
         }
     }

app/src/main/java/org/isoron/uhabits/activities/habits/show/ShowHabitRootView.java

@@ -24,7 +24,7 @@ import android.os.*;
 import android.support.annotation.*;
 import android.support.v7.widget.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.activities.habits.show.views.*;
 import org.isoron.uhabits.models.*;

app/src/main/java/org/isoron/uhabits/activities/habits/show/ShowHabitsMenu.java

@@ -24,6 +24,10 @@ import android.view.*;
 
 import org.isoron.uhabits.*;
 import org.isoron.uhabits.activities.*;
+import org.isoron.uhabits.models.*;
+import org.isoron.uhabits.tasks.*;
+
+import java.util.*;
 
 import javax.inject.*;
 
@@ -33,12 +37,38 @@ public class ShowHabitsMenu extends BaseMenu
     @NonNull
     private final ShowHabitScreen screen;
 
+    @NonNull
+    private final Habit habit;
+
+    @NonNull
+    private final TaskRunner taskRunner;
+
+    @NonNull
+    private ExportCSVTaskFactory exportCSVFactory;
+
     @Inject
     public ShowHabitsMenu(@NonNull BaseActivity activity,
-                          @NonNull ShowHabitScreen screen)
+                          @NonNull ShowHabitScreen screen,
+                          @NonNull Habit habit,
+                          @NonNull ExportCSVTaskFactory exportCSVFactory,
+                          @NonNull TaskRunner taskRunner)
     {
         super(activity);
         this.screen = screen;
+        this.habit = habit;
+        this.taskRunner = taskRunner;
+        this.exportCSVFactory = exportCSVFactory;
+    }
+
+    public void exportHabit()
+    {
+        List<Habit> selected = new LinkedList<>();
+        selected.add(habit);
+        ExportCSVTask task = exportCSVFactory.create(selected, filename -> {
+            if (filename != null) screen.showSendFileScreen(filename);
+            else screen.showMessage(R.string.could_not_export);
+        });
+        taskRunner.execute(task);
     }
 
     @Override
@@ -50,6 +80,10 @@ public class ShowHabitsMenu extends BaseMenu
                 screen.showEditHabitDialog();
                 return true;
 
+            case R.id.export:
+                this.exportHabit();
+                return true;
+
             default:
                 return false;
         }

app/src/main/java/org/isoron/uhabits/activities/habits/show/views/FrequencyCard.java

@@ -25,6 +25,7 @@ import android.util.*;
 import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.tasks.*;

app/src/main/java/org/isoron/uhabits/activities/habits/show/views/HistoryCard.java

@@ -25,6 +25,7 @@ import android.util.*;
 import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.tasks.*;

app/src/main/java/org/isoron/uhabits/activities/habits/show/views/OverviewCard.java

@@ -25,6 +25,7 @@ import android.util.*;
 import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.tasks.*;

app/src/main/java/org/isoron/uhabits/activities/habits/show/views/ScoreCard.java

@@ -25,6 +25,7 @@ import android.util.*;
 import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.preferences.*;

app/src/main/java/org/isoron/uhabits/activities/habits/show/views/StreakCard.java

@@ -25,6 +25,7 @@ import android.util.*;
 import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.common.views.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.tasks.*;

app/src/main/java/org/isoron/uhabits/activities/habits/show/views/SubtitleCard.java

@@ -25,7 +25,7 @@ import android.content.res.*;
 import android.util.*;
 import android.widget.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.utils.*;
 

app/src/main/java/org/isoron/uhabits/activities/settings/SettingsFragment.java

@@ -22,12 +22,16 @@ package org.isoron.uhabits.activities.settings;
 import android.app.backup.*;
 import android.content.*;
 import android.os.*;
+import android.provider.*;
 import android.support.v7.preference.*;
 
 import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.habits.list.*;
+import org.isoron.uhabits.notifications.*;
 import org.isoron.uhabits.utils.*;
 
+import static android.os.Build.VERSION.*;
+
 public class SettingsFragment extends PreferenceFragmentCompat
     implements SharedPreferences.OnSharedPreferenceChangeListener
 {
@@ -62,8 +66,13 @@ public class SettingsFragment extends PreferenceFragmentCompat
 
         updateRingtoneDescription();
 
-        if (InterfaceUtils.isLocaleFullyTranslated())
-            removePreference("translate", "linksCategory");
+        if (SDK_INT < Build.VERSION_CODES.O)
+            findPreference("reminderCustomize").setVisible(false);
+        else
+        {
+            findPreference("reminderSound").setVisible(false);
+            findPreference("pref_snooze_interval").setVisible(false);
+        }
     }
 
     @Override
@@ -91,6 +100,17 @@ public class SettingsFragment extends PreferenceFragmentCompat
                 RINGTONE_REQUEST_CODE);
             return true;
         }
+        else if (key.equals("reminderCustomize"))
+        {
+            if (SDK_INT < Build.VERSION_CODES.O) return true;
+
+            NotificationTray.createAndroidNotificationChannel(getContext());
+            Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
+            intent.putExtra(Settings.EXTRA_APP_PACKAGE, getContext().getPackageName());
+            intent.putExtra(Settings.EXTRA_CHANNEL_ID, NotificationTray.REMINDERS_CHANNEL_ID);
+            startActivity(intent);
+            return true;
+        }
 
         return super.onPreferenceTreeClick(preference);
     }
@@ -110,14 +130,6 @@ public class SettingsFragment extends PreferenceFragmentCompat
         BackupManager.dataChanged("org.isoron.uhabits");
     }
 
-    private void removePreference(String preferenceKey, String categoryKey)
-    {
-        PreferenceCategory cat =
-            (PreferenceCategory) findPreference(categoryKey);
-        Preference pref = findPreference(preferenceKey);
-        cat.removePreference(pref);
-    }
-
     private void setResultOnPreferenceClick(String key, final int result)
     {
         Preference pref = findPreference(key);

app/src/main/java/org/isoron/uhabits/automation/EditSettingRootView.java

@@ -25,7 +25,7 @@ import android.support.v7.widget.*;
 import android.support.v7.widget.Toolbar;
 import android.widget.*;
 
-import org.isoron.uhabits.*;
+import org.isoron.uhabits.R;
 import org.isoron.uhabits.activities.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.utils.*;

app/src/main/java/org/isoron/uhabits/intents/IntentFactory.java

@@ -39,6 +39,12 @@ public class IntentFactory
     {
     }
 
+    public Intent helpTranslate(Context context)
+    {
+        String url = context.getString(R.string.translateURL);
+        return buildViewIntent(url);
+    }
+
     public Intent rateApp(Context context)
     {
         String url = context.getString(R.string.playStoreURL);

app/src/main/java/org/isoron/uhabits/io/HabitsCSVExporter.java

@@ -119,7 +119,7 @@ public class HabitsCSVExporter
         {
             String sane = sanitizeFilename(h.getName());
             String habitDirName =
-                String.format("%03d %s", allHabits.indexOf(h) + 1, sane);
+                String.format(Locale.US, "%03d %s", allHabits.indexOf(h) + 1, sane);
             habitDirName = habitDirName.trim() + "/";
 
             new File(exportDirName + habitDirName).mkdirs();
@@ -202,7 +202,7 @@ public class HabitsCSVExporter
                 checksWriter.write(String.valueOf(checkmarks.get(j)[i]));
                 checksWriter.write(DELIMITER);
                 String score =
-                        String.format("%.4f", ((float) scores.get(j)[i]) / Score.MAX_VALUE);
+                        String.format(Locale.US, "%.4f", ((float) scores.get(j)[i]) / Score.MAX_VALUE);
                 scoresWriter.write(score);
                 scoresWriter.write(DELIMITER);
             }

app/src/main/java/org/isoron/uhabits/io/LoopDBImporter.java

@@ -19,18 +19,20 @@
 
 package org.isoron.uhabits.io;
 
-import android.database.Cursor;
-import android.database.sqlite.SQLiteDatabase;
-import android.support.annotation.NonNull;
+import android.content.*;
+import android.database.*;
+import android.database.sqlite.*;
+import android.support.annotation.*;
+import android.util.*;
 
-import com.activeandroid.ActiveAndroid;
+import com.activeandroid.*;
 
+import org.isoron.uhabits.*;
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.utils.DatabaseUtils;
-import org.isoron.uhabits.utils.FileUtils;
+import org.isoron.uhabits.utils.*;
 
-import java.io.File;
-import java.io.IOException;
+import java.io.*;
 
 import javax.inject.*;
 
@@ -39,10 +41,15 @@ import javax.inject.*;
  */
 public class LoopDBImporter extends AbstractImporter
 {
+    @NonNull
+    private Context context;
+
     @Inject
-    public LoopDBImporter(@NonNull HabitList habits)
+    public LoopDBImporter(@NonNull @AppContext Context context,
+                          @NonNull HabitList habits)
     {
         super(habits);
+        this.context = context;
     }
 
     @Override
@@ -53,23 +60,37 @@ public class LoopDBImporter extends AbstractImporter
         SQLiteDatabase db = SQLiteDatabase.openDatabase(file.getPath(), null,
             SQLiteDatabase.OPEN_READONLY);
 
+        boolean canHandle = true;
+
         Cursor c = db.rawQuery(
             "select count(*) from SQLITE_MASTER where name=? or name=?",
-            new String[]{"Checkmarks", "Repetitions"});
+            new String[]{ "Checkmarks", "Repetitions" });
 
-        boolean result = (c.moveToFirst() && c.getInt(0) == 2);
+        if (!c.moveToFirst() || c.getInt(0) != 2)
+        {
+            Log.w("LoopDBImporter", "Cannot handle file: tables not found");
+            canHandle = false;
+        }
+
+        if (db.getVersion() > BuildConfig.databaseVersion)
+        {
+            Log.w("LoopDBImporter", String.format(
+                "Cannot handle file: incompatible version: %d > %d",
+                db.getVersion(), BuildConfig.databaseVersion));
+            canHandle = false;
+        }
 
         c.close();
         db.close();
-        return result;
+        return canHandle;
     }
 
     @Override
     public void importHabitsFromFile(@NonNull File file) throws IOException
     {
         ActiveAndroid.dispose();
-        File originalDB = DatabaseUtils.getDatabaseFile();
+        File originalDB = DatabaseUtils.getDatabaseFile(context);
         FileUtils.copy(file, originalDB);
-        DatabaseUtils.initializeActiveAndroid();
+        DatabaseUtils.initializeActiveAndroid(context);
     }
 }

app/src/main/java/org/isoron/uhabits/models/CheckmarkList.java

@@ -108,7 +108,7 @@ public abstract class CheckmarkList
      *
      * @return value of today's checkmark
      */
-    public final int getTodayValue()
+    public int getTodayValue()
     {
         Checkmark today = getToday();
         if (today != null) return today.getValue();
@@ -192,7 +192,7 @@ public abstract class CheckmarkList
         Checkmark newest = getNewestComputed();
         Checkmark oldest = getOldestComputed();
 
-        if (newest == null)
+        if (newest == null || oldest == null)
         {
             forceRecompute(from, to);
         }
@@ -208,6 +208,7 @@ public abstract class CheckmarkList
      *
      * @return oldest checkmark already computed
      */
+    @Nullable
     protected abstract Checkmark getOldestComputed();
 
     /**
@@ -285,5 +286,6 @@ public abstract class CheckmarkList
      *
      * @return newest checkmark already computed
      */
+    @Nullable
     protected abstract Checkmark getNewestComputed();
 }

app/src/main/java/org/isoron/uhabits/models/HabitList.java

@@ -48,9 +48,7 @@ public abstract class HabitList implements Iterable<Habit>
     public HabitList()
     {
         observable = new ModelObservable();
-        filter = new HabitMatcherBuilder()
-            .setArchivedAllowed(true)
-            .build();
+        filter = new HabitMatcherBuilder().setArchivedAllowed(true).build();
     }
 
     protected HabitList(@NonNull HabitMatcher filter)
@@ -106,6 +104,15 @@ public abstract class HabitList implements Iterable<Habit>
         return observable;
     }
 
+    public abstract Order getOrder();
+
+    /**
+     * Changes the order of the elements on the list.
+     *
+     * @param order the new order criterea
+     */
+    public abstract void setOrder(@NonNull Order order);
+
     /**
      * Returns the index of the given habit in the list, or -1 if the list does
      * not contain the habit.
@@ -149,7 +156,7 @@ public abstract class HabitList implements Iterable<Habit>
 
     public void repair()
     {
-        for(Habit h : this)
+        for (Habit h : this)
         {
             h.getCheckmarks().invalidateNewerThan(0);
             h.getStreaks().invalidateNewerThan(0);
@@ -228,4 +235,12 @@ public abstract class HabitList implements Iterable<Habit>
 
         csv.close();
     }
+
+    public enum Order
+    {
+        BY_NAME,
+        BY_COLOR,
+        BY_SCORE,
+        BY_POSITION
+    }
 }

app/src/main/java/org/isoron/uhabits/models/ScoreList.java

@@ -81,7 +81,7 @@ public abstract class ScoreList implements Iterable<Score>
      * @param timestamp the timestamp of a day
      * @return score value for that day
      */
-    public final int getValue(long timestamp)
+    public synchronized final int getValue(long timestamp)
     {
         compute(timestamp, timestamp);
         Score s = getComputedByTimestamp(timestamp);
@@ -173,7 +173,7 @@ public abstract class ScoreList implements Iterable<Score>
         {
             String timestamp = dateFormat.format(s.getTimestamp());
             String score =
-                String.format("%.4f", ((float) s.getValue()) / Score.MAX_VALUE);
+                String.format(Locale.US, "%.4f", ((float) s.getValue()) / Score.MAX_VALUE);
             out.write(String.format("%s,%s\n", timestamp, score));
         }
     }

app/src/main/java/org/isoron/uhabits/models/memory/MemoryCheckmarkList.java

@@ -72,6 +72,7 @@ public class MemoryCheckmarkList extends CheckmarkList
     }
 
     @Override
+    @Nullable
     protected Checkmark getOldestComputed()
     {
         if(list.isEmpty()) return null;
@@ -79,6 +80,7 @@ public class MemoryCheckmarkList extends CheckmarkList
     }
 
     @Override
+    @Nullable
     protected Checkmark getNewestComputed()
     {
         if(list.isEmpty()) return null;

app/src/main/java/org/isoron/uhabits/models/memory/MemoryHabitList.java

@@ -25,6 +25,8 @@ import org.isoron.uhabits.models.*;
 
 import java.util.*;
 
+import static org.isoron.uhabits.models.HabitList.Order.*;
+
 /**
  * In-memory implementation of {@link HabitList}.
  */
@@ -33,16 +35,23 @@ public class MemoryHabitList extends HabitList
     @NonNull
     private LinkedList<Habit> list;
 
+    private Comparator<Habit> comparator = null;
+
+    @NonNull
+    private Order order;
+
     public MemoryHabitList()
     {
         super();
         list = new LinkedList<>();
+        order = Order.BY_POSITION;
     }
 
     protected MemoryHabitList(@NonNull HabitMatcher matcher)
     {
         super(matcher);
         list = new LinkedList<>();
+        order = Order.BY_POSITION;
     }
 
     @Override
@@ -57,6 +66,7 @@ public class MemoryHabitList extends HabitList
 
         if (id == null) habit.setId((long) list.size());
         list.addLast(habit);
+        resort();
     }
 
     @Override
@@ -82,10 +92,17 @@ public class MemoryHabitList extends HabitList
     public HabitList getFiltered(HabitMatcher matcher)
     {
         MemoryHabitList habits = new MemoryHabitList(matcher);
-        for(Habit h : this) if (matcher.matches(h)) habits.add(h);
+        habits.comparator = comparator;
+        for (Habit h : this) if (matcher.matches(h)) habits.add(h);
         return habits;
     }
 
+    @Override
+    public Order getOrder()
+    {
+        return order;
+    }
+
     @Override
     public int indexOf(@NonNull Habit h)
     {
@@ -112,6 +129,14 @@ public class MemoryHabitList extends HabitList
         list.add(toPos, from);
     }
 
+    @Override
+    public void setOrder(@NonNull Order order)
+    {
+        this.order = order;
+        this.comparator = getComparatorByOrder(order);
+        resort();
+    }
+
     @Override
     public int size()
     {
@@ -123,4 +148,34 @@ public class MemoryHabitList extends HabitList
     {
         // NOP
     }
+
+    private Comparator<Habit> getComparatorByOrder(Order order)
+    {
+        Comparator<Habit> nameComparator =
+            (h1, h2) -> h1.getName().compareTo(h2.getName());
+
+        Comparator<Habit> colorComparator = (h1, h2) -> {
+            Integer c1 = h1.getColor();
+            Integer c2 = h2.getColor();
+            if (c1.equals(c2)) return nameComparator.compare(h1, h2);
+            else return c1.compareTo(c2);
+        };
+
+        Comparator<Habit> scoreComparator = (h1, h2) -> {
+            int s1 = h1.getScores().getTodayValue();
+            int s2 = h2.getScores().getTodayValue();
+            return Integer.compare(s2, s1);
+        };
+
+        if (order == BY_POSITION) return null;
+        if (order == BY_NAME) return nameComparator;
+        if (order == BY_COLOR) return colorComparator;
+        if (order == BY_SCORE) return scoreComparator;
+        throw new IllegalStateException();
+    }
+
+    private void resort()
+    {
+        if (comparator != null) Collections.sort(list, comparator);
+    }
 }

app/src/main/java/org/isoron/uhabits/models/sqlite/InvalidDatabaseVersionException.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2016 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.models.sqlite;
+
+public class InvalidDatabaseVersionException extends RuntimeException
+{
+}

app/src/main/java/org/isoron/uhabits/models/sqlite/SQLiteCheckmarkList.java

@@ -24,7 +24,6 @@ import android.support.annotation.*;
 import android.support.annotation.Nullable;
 
 import com.activeandroid.*;
-import com.activeandroid.query.*;
 
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.models.sqlite.records.*;
@@ -38,12 +37,22 @@ import java.util.*;
  */
 public class SQLiteCheckmarkList extends CheckmarkList
 {
+
+    private static final String ADD_QUERY =
+        "insert into Checkmarks(habit, timestamp, value) values (?,?,?)";
+
+    private static final String INVALIDATE_QUERY =
+        "delete from Checkmarks where habit = ? and timestamp >= ?";
+
     @Nullable
     private HabitRecord habitRecord;
 
     @NonNull
     private final SQLiteUtils<CheckmarkRecord> sqlite;
 
+    @Nullable
+    private CachedData cache;
+
     public SQLiteCheckmarkList(Habit habit)
     {
         super(habit);
@@ -54,16 +63,11 @@ public class SQLiteCheckmarkList extends CheckmarkList
     public void add(List<Checkmark> checkmarks)
     {
         check(habit.getId());
-
-        String query =
-            "insert into Checkmarks(habit, timestamp, value) values (?,?,?)";
-
         SQLiteDatabase db = Cache.openDatabase();
+        SQLiteStatement statement = db.compileStatement(ADD_QUERY);
         db.beginTransaction();
         try
         {
-            SQLiteStatement statement = db.compileStatement(query);
-
             for (Checkmark c : checkmarks)
             {
                 statement.bindLong(1, habit.getId());
@@ -87,8 +91,7 @@ public class SQLiteCheckmarkList extends CheckmarkList
         check(habit.getId());
         compute(fromTimestamp, toTimestamp);
 
-        String query = "select habit, timestamp, value " +
-                       "from checkmarks " +
+        String query = "select habit, timestamp, value from checkmarks " +
                        "where habit = ? and timestamp >= ? and timestamp <= ? " +
                        "order by timestamp desc";
 
@@ -101,26 +104,28 @@ public class SQLiteCheckmarkList extends CheckmarkList
         List<CheckmarkRecord> records = sqlite.query(query, params);
         for (CheckmarkRecord record : records) record.habit = habitRecord;
 
-        int nDays = DateUtils.getDaysBetween(fromTimestamp, toTimestamp) + 1;
-        if (records.size() != nDays)
-        {
-            throw new InconsistentDatabaseException(
-                String.format("habit=%s, %d expected, %d found",
-                    habit.getName(), nDays, records.size()));
+        records = fixRecords(records, habitRecord, fromTimestamp, toTimestamp);
+        return toCheckmarks(records);
     }
 
-        return toCheckmarks(records);
+    @Override
+    public int getTodayValue()
+    {
+        if (cache == null || cache.expired())
+            cache = new CachedData(super.getTodayValue());
+
+        return cache.todayValue;
     }
 
     @Override
     public void invalidateNewerThan(long timestamp)
     {
-        new Delete()
-            .from(CheckmarkRecord.class)
-            .where("habit = ?", habit.getId())
-            .and("timestamp >= ?", timestamp)
-            .execute();
-
+        cache = null;
+        SQLiteDatabase db = Cache.openDatabase();
+        SQLiteStatement statement = db.compileStatement(INVALIDATE_QUERY);
+        statement.bindLong(1, habit.getId());
+        statement.bindLong(2, timestamp);
+        statement.execute();
         observable.notifyListeners();
     }
 
@@ -129,10 +134,8 @@ public class SQLiteCheckmarkList extends CheckmarkList
     protected Checkmark getNewestComputed()
     {
         check(habit.getId());
-        String query = "select habit, timestamp, value " +
-                       "from checkmarks " +
-                       "where habit = ? " +
-                       "order by timestamp desc " +
+        String query = "select habit, timestamp, value from checkmarks " +
+                       "where habit = ? " + "order by timestamp desc " +
                        "limit 1";
 
         String params[] = { Long.toString(habit.getId()) };
@@ -140,13 +143,12 @@ public class SQLiteCheckmarkList extends CheckmarkList
     }
 
     @Override
+    @Nullable
     protected Checkmark getOldestComputed()
     {
         check(habit.getId());
-        String query = "select habit, timestamp, value " +
-                       "from checkmarks " +
-                       "where habit = ? " +
-                       "order by timestamp asc " +
+        String query = "select habit, timestamp, value from checkmarks " +
+                       "where habit = ? " + "order by timestamp asc " +
                        "limit 1";
 
         String params[] = { Long.toString(habit.getId()) };
@@ -179,4 +181,44 @@ public class SQLiteCheckmarkList extends CheckmarkList
         for (CheckmarkRecord r : records) checkmarks.add(r.toCheckmark());
         return checkmarks;
     }
+
+    public static List<CheckmarkRecord> fixRecords(List<CheckmarkRecord> original,
+                                                   HabitRecord habit,
+                                                   long fromTimestamp,
+                                                   long toTimestamp)
+    {
+        long day = DateUtils.millisecondsInOneDay;
+        ArrayList<CheckmarkRecord> records = new ArrayList<>();
+
+        for (long t = toTimestamp; t >= fromTimestamp; t -= day)
+            records.add(new CheckmarkRecord(habit, t, Checkmark.UNCHECKED));
+
+        for (CheckmarkRecord record : original)
+        {
+            if ((toTimestamp - record.timestamp) % day != 0) continue;
+            int offset = (int) ((toTimestamp - record.timestamp) / day);
+            if (offset < 0 || offset >= records.size()) continue;
+            records.set(offset, record);
+        }
+
+        return records;
+    }
+
+    private static class CachedData
+    {
+        int todayValue;
+
+        private long today;
+
+        CachedData(int todayValue)
+        {
+            this.todayValue = todayValue;
+            this.today = DateUtils.getStartOfToday();
+        }
+
+        boolean expired()
+        {
+            return today != DateUtils.getStartOfToday();
+        }
+    }
 }

app/src/main/java/org/isoron/uhabits/models/sqlite/SQLiteHabitList.java

@@ -39,10 +39,15 @@ public class SQLiteHabitList extends HabitList
 
     private static SQLiteHabitList instance;
 
+    @NonNull
     private final SQLiteUtils<HabitRecord> sqlite;
 
+    @NonNull
     private final ModelFactory modelFactory;
 
+    @NonNull
+    private Order order;
+
     public SQLiteHabitList(@NonNull ModelFactory modelFactory)
     {
         super();
@@ -50,16 +55,19 @@ public class SQLiteHabitList extends HabitList
 
         if (cache == null) cache = new HashMap<>();
         sqlite = new SQLiteUtils<>(HabitRecord.class);
+        order = Order.BY_POSITION;
     }
 
     protected SQLiteHabitList(@NonNull ModelFactory modelFactory,
-                              @NonNull HabitMatcher filter)
+                              @NonNull HabitMatcher filter,
+                              @NonNull Order order)
     {
         super(filter);
         this.modelFactory = modelFactory;
 
         if (cache == null) cache = new HashMap<>();
         sqlite = new SQLiteUtils<>(HabitRecord.class);
+        this.order = order;
     }
 
     public static SQLiteHabitList getInstance(
@@ -118,7 +126,20 @@ public class SQLiteHabitList extends HabitList
     @Override
     public HabitList getFiltered(HabitMatcher filter)
     {
-        return new SQLiteHabitList(modelFactory, filter);
+        return new SQLiteHabitList(modelFactory, filter, order);
+    }
+
+    @Override
+    @NonNull
+    public Order getOrder()
+    {
+        return order;
+    }
+
+    @Override
+    public void setOrder(@NonNull Order order)
+    {
+        this.order = order;
     }
 
     @Override
@@ -214,6 +235,13 @@ public class SQLiteHabitList extends HabitList
         getObservable().notifyListeners();
     }
 
+    @Override
+    public void repair()
+    {
+        super.repair();
+        rebuildOrder();
+    }
+
     @Override
     public int size()
     {
@@ -233,7 +261,7 @@ public class SQLiteHabitList extends HabitList
         }
     }
 
-    protected List<Habit> toList()
+    protected synchronized List<Habit> toList()
     {
         String query = buildSelectQuery();
         List<HabitRecord> recordList = sqlite.query(query, null);
@@ -242,19 +270,43 @@ public class SQLiteHabitList extends HabitList
         for (HabitRecord record : recordList)
         {
             Habit habit = getById(record.getId());
-            if (habit == null)
-                throw new RuntimeException("habit not in database");
-
+            if (habit == null) continue;
             if (!filter.matches(habit)) continue;
             habits.add(habit);
         }
 
+        if(order == Order.BY_SCORE)
+        {
+            Collections.sort(habits, (lhs, rhs) -> {
+                int s1 = lhs.getScores().getTodayValue();
+                int s2 = rhs.getScores().getTodayValue();
+                return Integer.compare(s2, s1);
+            });
+        }
+
         return habits;
     }
 
     private void appendOrderBy(StringBuilder query)
     {
+        switch (order)
+        {
+            case BY_POSITION:
                 query.append("order by position ");
+                break;
+
+            case BY_NAME:
+            case BY_SCORE:
+                query.append("order by name ");
+                break;
+
+            case BY_COLOR:
+                query.append("order by color, name ");
+                break;
+
+            default:
+                throw new IllegalStateException();
+        }
     }
 
     private void appendSelect(StringBuilder query)
@@ -282,11 +334,4 @@ public class SQLiteHabitList extends HabitList
         appendOrderBy(query);
         return query.toString();
     }
-
-    @Override
-    public void repair()
-    {
-        super.repair();
-        rebuildOrder();
-    }
 }

app/src/main/java/org/isoron/uhabits/models/sqlite/SQLiteRepetitionList.java

@@ -19,12 +19,12 @@
 
 package org.isoron.uhabits.models.sqlite;
 
-import android.database.DatabaseUtils;
-import android.database.sqlite.SQLiteDatabase;
+import android.database.*;
+import android.database.sqlite.*;
 import android.support.annotation.*;
 import android.support.annotation.Nullable;
 
-import com.activeandroid.Cache;
+import com.activeandroid.*;
 import com.activeandroid.query.*;
 
 import org.isoron.uhabits.models.*;
@@ -43,10 +43,16 @@ public class SQLiteRepetitionList extends RepetitionList
     @Nullable
     private HabitRecord habitRecord;
 
+    private SQLiteStatement addStatement;
+
     public SQLiteRepetitionList(@NonNull Habit habit)
     {
         super(habit);
         sqlite = new SQLiteUtils<>(RepetitionRecord.class);
+
+        SQLiteDatabase db = Cache.openDatabase();
+        String addQuery = "insert into repetitions(habit, timestamp) values (?,?)";
+        addStatement = db.compileStatement(addQuery);
     }
 
     /**
@@ -61,11 +67,9 @@ public class SQLiteRepetitionList extends RepetitionList
     public void add(Repetition rep)
     {
         check(habit.getId());
-
-        RepetitionRecord record = new RepetitionRecord();
-        record.copyFrom(rep);
-        record.habit = habitRecord;
-        record.save();
+        addStatement.bindLong(1, habit.getId());
+        addStatement.bindLong(2, rep.getTimestamp());
+        addStatement.execute();
         observable.notifyListeners();
     }
 

app/src/main/java/org/isoron/uhabits/models/sqlite/SQLiteScoreList.java

@@ -24,10 +24,10 @@ import android.support.annotation.*;
 import android.support.annotation.Nullable;
 
 import com.activeandroid.*;
-import com.activeandroid.query.*;
 
 import org.isoron.uhabits.models.*;
 import org.isoron.uhabits.models.sqlite.records.*;
+import org.isoron.uhabits.utils.*;
 import org.jetbrains.annotations.*;
 
 import java.util.*;
@@ -37,12 +37,21 @@ import java.util.*;
  */
 public class SQLiteScoreList extends ScoreList
 {
+    public static final String ADD_QUERY =
+        "insert into Score(habit, timestamp, score) values (?,?,?)";
+
+    public static final String INVALIDATE_QUERY =
+        "delete from Score where habit = ? and timestamp >= ?";
+
     @Nullable
     private HabitRecord habitRecord;
 
     @NonNull
     private final SQLiteUtils<ScoreRecord> sqlite;
 
+    @Nullable
+    private CachedData cache = null;
+
     /**
      * Constructs a new ScoreList associated with the given habit.
      *
@@ -58,16 +67,11 @@ public class SQLiteScoreList extends ScoreList
     public void add(List<Score> scores)
     {
         check(habit.getId());
-        String query =
-            "insert into Score(habit, timestamp, score) values (?,?,?)";
-
         SQLiteDatabase db = Cache.openDatabase();
+        SQLiteStatement statement = db.compileStatement(ADD_QUERY);
         db.beginTransaction();
-
         try
         {
-            SQLiteStatement statement = db.compileStatement(query);
-
             for (Score s : scores)
             {
                 statement.bindLong(1, habit.getId());
@@ -86,13 +90,13 @@ public class SQLiteScoreList extends ScoreList
 
     @NonNull
     @Override
-    public List<Score> getByInterval(long fromTimestamp, long toTimestamp)
+    public synchronized List<Score> getByInterval(long fromTimestamp,
+                                                  long toTimestamp)
     {
         check(habit.getId());
         compute(fromTimestamp, toTimestamp);
 
-        String query = "select habit, timestamp, score " +
-                "from Score " +
+        String query = "select habit, timestamp, score from Score " +
                        "where habit = ? and timestamp >= ? and timestamp <= ? " +
                        "order by timestamp desc";
 
@@ -124,14 +128,23 @@ public class SQLiteScoreList extends ScoreList
     }
 
     @Override
-    public void invalidateNewerThan(long timestamp)
+    public synchronized int getTodayValue()
     {
-        new Delete()
-            .from(ScoreRecord.class)
-            .where("habit = ?", habit.getId())
-            .and("timestamp >= ?", timestamp)
-            .execute();
+        if (cache == null || cache.expired())
+            cache = new CachedData(super.getTodayValue());
 
+        return cache.todayValue;
+    }
+
+    @Override
+    public synchronized void invalidateNewerThan(long timestamp)
+    {
+        cache = null;
+        SQLiteDatabase db = Cache.openDatabase();
+        SQLiteStatement statement = db.compileStatement(INVALIDATE_QUERY);
+        statement.bindLong(1, habit.getId());
+        statement.bindLong(2, timestamp);
+        statement.execute();
         getObservable().notifyListeners();
     }
 
@@ -159,8 +172,7 @@ public class SQLiteScoreList extends ScoreList
     {
         check(habit.getId());
         String query = "select habit, timestamp, score from Score " +
-                       "where habit = ? order by timestamp desc " +
-                       "limit 1";
+                       "where habit = ? order by timestamp desc limit 1";
 
         String params[] = { Long.toString(habit.getId()) };
         return getScoreFromQuery(query, params);
@@ -172,8 +184,7 @@ public class SQLiteScoreList extends ScoreList
     {
         check(habit.getId());
         String query = "select habit, timestamp, score from Score " +
-                       "where habit = ? order by timestamp asc " +
-                       "limit 1";
+                       "where habit = ? order by timestamp asc limit 1";
 
         String params[] = { Long.toString(habit.getId()) };
         return getScoreFromQuery(query, params);
@@ -204,4 +215,22 @@ public class SQLiteScoreList extends ScoreList
         for (ScoreRecord r : records) scores.add(r.toScore());
         return scores;
     }
+
+    private static class CachedData
+    {
+        int todayValue;
+
+        private long today;
+
+        CachedData(int todayValue)
+        {
+            this.todayValue = todayValue;
+            this.today = DateUtils.getStartOfToday();
+        }
+
+        boolean expired()
+        {
+            return today != DateUtils.getStartOfToday();
+        }
+    }
 }