Merge branch 'widgets' into dev

app/src/main/AndroidManifest.xml

@@ -10,11 +10,11 @@
 
     <application
         android:name="com.activeandroid.app.Application"
+        android:allowBackup="true"
+        android:backupAgent=".HabitsBackupAgent"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/main_activity_title"
-        android:theme="@style/AppBaseTheme"
+        android:theme="@style/AppBaseTheme">
-        android:allowBackup="true"
-        android:backupAgent=".HabitsBackupAgent">
 
         <meta-data
             android:name="AA_DB_NAME"
@@ -26,7 +26,7 @@
 
         <meta-data
             android:name="com.google.android.backup.api_key"
-            android:value="AEdPqrEAAAAI6aeWncbnMNo8E5GWeZ44dlc5cQ7tCROwFhOtiw" />
+            android:value="AEdPqrEAAAAI6aeWncbnMNo8E5GWeZ44dlc5cQ7tCROwFhOtiw"/>
 
         <activity
             android:name=".MainActivity"
@@ -39,7 +39,7 @@
         </activity>
 
         <receiver
-            android:name=".ReminderAlarmReceiver" />
+            android:name=".HabitBroadcastReceiver"/>
 
         <activity
             android:name=".ShowHabitActivity"
@@ -59,9 +59,65 @@
                 android:value="org.isoron.uhabits.MainActivity"/>
         </activity>
 
-        <activity android:name=".IntroActivity"
+        <activity
-                  android:label=""
+            android:name=".IntroActivity"
-                  android:theme="@style/Theme.AppCompat.Light.NoActionBar" />
+            android:label=""
+            android:theme="@style/Theme.AppCompat.Light.NoActionBar"/>
+
+        <receiver
+            android:name=".widgets.CheckmarkWidgetProvider"
+            android:label="Checkmark">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/widget_checkmark_info"/>
+        </receiver>
+
+        <receiver
+            android:name=".widgets.HistoryWidgetProvider"
+            android:label="History">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/widget_history_info"/>
+        </receiver>
+
+        <receiver
+            android:name=".widgets.ScoreWidgetProvider"
+            android:label="Score">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/widget_score_info"/>
+        </receiver>
+
+        <receiver
+            android:name=".widgets.StreakWidgetProvider"
+            android:label="Streaks">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/widget_streak_info"/>
+        </receiver>
+
+        <activity
+            android:name=".widgets.HabitPickerDialog"
+            android:theme="@style/Theme.AppCompat.Light.Dialog">
+
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
+            </intent-filter>
+
+        </activity>
+
     </application>
 
 </manifest>

app/src/main/java/org/isoron/helpers/DialogHelper.java

@@ -18,10 +18,12 @@ package org.isoron.helpers;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.content.res.Resources;
 import android.graphics.Typeface;
 import android.os.Vibrator;
 import android.preference.PreferenceManager;
 import android.util.AttributeSet;
+import android.util.DisplayMetrics;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 
@@ -72,4 +74,11 @@ public abstract class DialogHelper
         else
             return attrs.getAttributeValue(ISORON_NAMESPACE, name);
     }
+
+    public static float dpToPixels(Context context, float dp)
+    {
+        Resources resources = context.getResources();
+        DisplayMetrics metrics = resources.getDisplayMetrics();
+        return dp * (metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
+    }
 }

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

@@ -31,6 +31,7 @@ import android.net.Uri;
 import android.os.Handler;
 import android.preference.PreferenceManager;
 import android.support.v4.app.NotificationCompat;
+import android.support.v4.content.LocalBroadcastManager;
 
 import org.isoron.helpers.DateHelper;
 import org.isoron.uhabits.helpers.ReminderHelper;
@@ -38,12 +39,11 @@ import org.isoron.uhabits.models.Habit;
 
 import java.util.Date;
 
-public class ReminderAlarmReceiver extends BroadcastReceiver
+public class HabitBroadcastReceiver extends BroadcastReceiver
 {
     public static final String ACTION_CHECK = "org.isoron.uhabits.ACTION_CHECK";
     public static final String ACTION_DISMISS = "org.isoron.uhabits.ACTION_DISMISS";
-    public static final String ACTION_REMIND = "org.isoron.uhabits.ACTION_REMIND";
+    public static final String ACTION_SHOW_REMINDER = "org.isoron.uhabits.ACTION_SHOW_REMINDER";
-    public static final String ACTION_REMOVE_REMINDER = "org.isoron.uhabits.ACTION_REMOVE_REMINDER";
     public static final String ACTION_SNOOZE = "org.isoron.uhabits.ACTION_SNOOZE";
 
     @Override
@@ -51,7 +51,7 @@ public class ReminderAlarmReceiver extends BroadcastReceiver
     {
         switch (intent.getAction())
         {
-            case ACTION_REMIND:
+            case ACTION_SHOW_REMINDER:
                 createNotification(context, intent);
                 createReminderAlarms(context);
                 break;
@@ -103,6 +103,12 @@ public class ReminderAlarmReceiver extends BroadcastReceiver
         habit.toggleRepetition(timestamp);
         habit.save();
         dismissNotification(context, habit);
+
+        LocalBroadcastManager manager = LocalBroadcastManager.getInstance(context);
+        Intent refreshIntent = new Intent(MainActivity.ACTION_REFRESH);
+        manager.sendBroadcast(refreshIntent);
+
+        MainActivity.updateWidgets(context);
     }
 
     private void dismissAllHabits()
@@ -146,21 +152,9 @@ public class ReminderAlarmReceiver extends BroadcastReceiver
         PendingIntent contentPendingIntent =
                 PendingIntent.getActivity(context, 0, contentIntent, 0);
 
-        Intent deleteIntent = new Intent(context, ReminderAlarmReceiver.class);
+        PendingIntent dismissPendingIntent = buildDismissIntent(context);
-        deleteIntent.setAction(ACTION_DISMISS);
+        PendingIntent checkIntentPending = buildCheckIntent(context, habit, timestamp);
-        PendingIntent deletePendingIntent = PendingIntent.getBroadcast(context, 0, deleteIntent, 0);
+        PendingIntent snoozeIntentPending = buildSnoozeIntent(context, habit);
-
-        Intent checkIntent = new Intent(context, ReminderAlarmReceiver.class);
-        checkIntent.setData(data);
-        checkIntent.setAction(ACTION_CHECK);
-        checkIntent.putExtra("timestamp", timestamp);
-        PendingIntent checkIntentPending =
-                PendingIntent.getBroadcast(context, 0, checkIntent, PendingIntent.FLAG_ONE_SHOT);
-
-        Intent snoozeIntent = new Intent(context, ReminderAlarmReceiver.class);
-        snoozeIntent.setData(data);
-        snoozeIntent.setAction(ACTION_SNOOZE);
-        PendingIntent snoozeIntentPending = PendingIntent.getBroadcast(context, 0, snoozeIntent, 0);
 
         Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
 
@@ -173,7 +167,7 @@ public class ReminderAlarmReceiver extends BroadcastReceiver
                         .setContentTitle(habit.name)
                         .setContentText(habit.description)
                         .setContentIntent(contentPendingIntent)
-                        .setDeleteIntent(deletePendingIntent)
+                        .setDeleteIntent(dismissPendingIntent)
                         .addAction(R.drawable.ic_action_check,
                                 context.getString(R.string.check), checkIntentPending)
                         .addAction(R.drawable.ic_action_snooze,
@@ -193,6 +187,32 @@ public class ReminderAlarmReceiver extends BroadcastReceiver
         notificationManager.notify(notificationId, notification);
     }
 
+    public static PendingIntent buildSnoozeIntent(Context context, Habit habit)
+    {
+        Uri data = habit.getUri();
+        Intent snoozeIntent = new Intent(context, HabitBroadcastReceiver.class);
+        snoozeIntent.setData(data);
+        snoozeIntent.setAction(ACTION_SNOOZE);
+        return PendingIntent.getBroadcast(context, 0, snoozeIntent, 0);
+    }
+
+    public static PendingIntent buildCheckIntent(Context context, Habit habit, Long timestamp)
+    {
+        Uri data = habit.getUri();
+        Intent checkIntent = new Intent(context, HabitBroadcastReceiver.class);
+        checkIntent.setData(data);
+        checkIntent.setAction(ACTION_CHECK);
+        if(timestamp != null) checkIntent.putExtra("timestamp", timestamp);
+        return PendingIntent.getBroadcast(context, 0, checkIntent, PendingIntent.FLAG_ONE_SHOT);
+    }
+
+    public static PendingIntent buildDismissIntent(Context context)
+    {
+        Intent deleteIntent = new Intent(context, HabitBroadcastReceiver.class);
+        deleteIntent.setAction(ACTION_DISMISS);
+        return PendingIntent.getBroadcast(context, 0, deleteIntent, 0);
+    }
+
     private boolean checkWeekday(Intent intent, Habit habit)
     {
         Long timestamp = intent.getLongExtra("timestamp", DateHelper.getStartOfToday());

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

@@ -16,11 +16,17 @@
 
 package org.isoron.uhabits;
 
+import android.appwidget.AppWidgetManager;
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
+import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.support.v4.content.LocalBroadcastManager;
 import android.view.Menu;
 import android.view.MenuItem;
 
@@ -30,12 +36,21 @@ import org.isoron.helpers.ReplayableActivity;
 import org.isoron.uhabits.fragments.ListHabitsFragment;
 import org.isoron.uhabits.helpers.ReminderHelper;
 import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.widgets.BaseWidgetProvider;
+import org.isoron.uhabits.widgets.CheckmarkWidgetProvider;
+import org.isoron.uhabits.widgets.HistoryWidgetProvider;
+import org.isoron.uhabits.widgets.ScoreWidgetProvider;
+import org.isoron.uhabits.widgets.StreakWidgetProvider;
 
 public class MainActivity extends ReplayableActivity
         implements ListHabitsFragment.OnHabitClickListener
 {
     private ListHabitsFragment listHabitsFragment;
-    SharedPreferences prefs;
+    private SharedPreferences prefs;
+    private BroadcastReceiver receiver;
+    private LocalBroadcastManager localBroadcastManager;
+
+    public static final String ACTION_REFRESH = "org.isoron.uhabits.ACTION_REFRESH";
 
     @Override
     protected void onCreate(Bundle savedInstanceState)
@@ -47,6 +62,10 @@ public class MainActivity extends ReplayableActivity
         listHabitsFragment =
                 (ListHabitsFragment) getFragmentManager().findFragmentById(R.id.fragment1);
 
+        receiver = new Receiver();
+        localBroadcastManager = LocalBroadcastManager.getInstance(this);
+        localBroadcastManager.registerReceiver(receiver, new IntentFilter(ACTION_REFRESH));
+
         onStartup();
     }
 
@@ -56,6 +75,7 @@ public class MainActivity extends ReplayableActivity
         ReminderHelper.createReminderAlarms(MainActivity.this);
         DialogHelper.incrementLaunchCount(this);
         showTutorial();
+        updateWidgets(this);
     }
 
     private void showTutorial()
@@ -108,5 +128,40 @@ public class MainActivity extends ReplayableActivity
     public void onPostExecuteCommand(Long refreshKey)
     {
         listHabitsFragment.onPostExecuteCommand(refreshKey);
+        updateWidgets(this);
+    }
+
+    public static void updateWidgets(Context context)
+    {
+        updateWidgets(context, CheckmarkWidgetProvider.class);
+        updateWidgets(context, HistoryWidgetProvider.class);
+        updateWidgets(context, ScoreWidgetProvider.class);
+        updateWidgets(context, StreakWidgetProvider.class);
+    }
+
+    private static void updateWidgets(Context context, Class providerClass)
+    {
+        ComponentName provider = new ComponentName(context, providerClass);
+        Intent intent = new Intent(context, providerClass);
+        intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
+        int ids[] = AppWidgetManager.getInstance(context).getAppWidgetIds(provider);
+        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
+        context.sendBroadcast(intent);
+    }
+
+    @Override
+    protected void onDestroy()
+    {
+        localBroadcastManager.unregisterReceiver(receiver);
+        super.onDestroy();
+    }
+
+    class Receiver extends BroadcastReceiver
+    {
+        @Override
+        public void onReceive(Context context, Intent intent)
+        {
+            listHabitsFragment.onPostExecuteCommand(null);
+        }
     }
 }

app/src/main/java/org/isoron/uhabits/fragments/ListHabitsFragment.java

@@ -660,7 +660,7 @@ public class ListHabitsFragment extends Fragment
 
                 LinearLayout.LayoutParams params =
                         new LinearLayout.LayoutParams(tvNameWidth, LayoutParams.WRAP_CONTENT, 1);
-                view.findViewById(R.id.tvName).setLayoutParams(params);
+                view.findViewById(R.id.label).setLayoutParams(params);
 
                 inflateCheckmarkButtons(view);
 
@@ -668,7 +668,7 @@ public class ListHabitsFragment extends Fragment
             }
 
             TextView tvStar = ((TextView) view.findViewById(R.id.tvStar));
-            TextView tvName = (TextView) view.findViewById(R.id.tvName);
+            TextView tvName = (TextView) view.findViewById(R.id.label);
             LinearLayout llInner = (LinearLayout) view.findViewById(R.id.llInner);
             LinearLayout llButtons = (LinearLayout) view.findViewById(R.id.llButtons);
 

app/src/main/java/org/isoron/uhabits/helpers/ReminderHelper.java

@@ -25,7 +25,7 @@ import android.os.Build;
 import android.util.Log;
 
 import org.isoron.helpers.DateHelper;
-import org.isoron.uhabits.ReminderAlarmReceiver;
+import org.isoron.uhabits.HabitBroadcastReceiver;
 import org.isoron.uhabits.models.Habit;
 
 import java.text.DateFormat;
@@ -58,10 +58,10 @@ public class ReminderHelper
 
         long timestamp = DateHelper.getStartOfDay(DateHelper.toLocalTime(reminderTime));
 
-        Uri uri = Uri.parse(String.format("content://org.isoron.uhabits/habit/%d", habit.getId()));
+        Uri uri = habit.getUri();
 
-        Intent alarmIntent = new Intent(context, ReminderAlarmReceiver.class);
+        Intent alarmIntent = new Intent(context, HabitBroadcastReceiver.class);
-        alarmIntent.setAction(ReminderAlarmReceiver.ACTION_REMIND);
+        alarmIntent.setAction(HabitBroadcastReceiver.ACTION_SHOW_REMINDER);
         alarmIntent.setData(uri);
         alarmIntent.putExtra("timestamp", timestamp);
         alarmIntent.putExtra("reminderTime", reminderTime);

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

@@ -19,6 +19,7 @@ package org.isoron.uhabits.models;
 import android.annotation.SuppressLint;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
 
 import com.activeandroid.ActiveAndroid;
 import com.activeandroid.Cache;
@@ -383,6 +384,24 @@ public class Habit extends Model
                 .executeSingle();
     }
 
+    public int getCurrentCheckmarkStatus()
+    {
+        updateCheckmarks();
+        Checkmark c = getNewestCheckmark();
+
+        if(c != null) return c.value;
+        else return 0;
+    }
+
+    public int getCurrentStarStatus()
+    {
+        int score = getScore();
+
+        if(score >= FULL_STAR_CUTOFF) return 2;
+        else if(score >= HALF_STAR_CUTOFF) return 1;
+        else return 0;
+    }
+
     public int getRepsCount(int days)
     {
         long timeTo = DateHelper.getStartOfToday();
@@ -426,6 +445,11 @@ public class Habit extends Model
         deleteStreaksNewerThan(timestamp);
     }
 
+    public Uri getUri()
+    {
+        return Uri.parse(String.format("content://org.isoron.uhabits/habit/%d", getId()));
+    }
+
     public void archive()
     {
         archived = 1;

app/src/main/java/org/isoron/uhabits/views/CheckmarkView.java

@@ -0,0 +1,212 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.views;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.Typeface;
+import android.os.Build;
+import android.text.Layout;
+import android.text.StaticLayout;
+import android.text.TextPaint;
+import android.util.AttributeSet;
+import android.view.View;
+
+import org.isoron.helpers.ColorHelper;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+
+public class CheckmarkView extends View
+{
+    private Paint pCard;
+    private Paint pIcon;
+
+    private int primaryColor;
+    private int backgroundColor;
+    private int timesColor;
+    private int darkGrey;
+
+    private int width;
+    private int height;
+    private int leftMargin;
+    private int topMargin;
+    private int padding;
+    private String label;
+
+    private String fa_check;
+    private String fa_times;
+    private String fa_full_star;
+    private String fa_half_star;
+    private String fa_empty_star;
+
+    private int check_status;
+    private int star_status;
+
+    private Rect rect;
+    private TextPaint textPaint;
+    private StaticLayout labelLayout;
+
+    public CheckmarkView(Context context)
+    {
+        super(context);
+        init(context);
+    }
+
+    public CheckmarkView(Context context, AttributeSet attrs)
+    {
+        super(context, attrs);
+        init(context);
+    }
+
+    private void init(Context context)
+    {
+        Typeface fontawesome =
+                Typeface.createFromAsset(context.getAssets(), "fontawesome-webfont.ttf");
+
+        pCard = new Paint();
+        pCard.setAntiAlias(true);
+
+        pIcon = new Paint();
+        pIcon.setAntiAlias(true);
+        pIcon.setTypeface(fontawesome);
+        pIcon.setTextAlign(Paint.Align.CENTER);
+
+        textPaint = new TextPaint();
+        textPaint.setColor(Color.WHITE);
+        textPaint.setAntiAlias(true);
+
+        fa_check = context.getString(R.string.fa_check);
+        fa_times = context.getString(R.string.fa_times);
+        fa_empty_star = context.getString(R.string.fa_star_o);
+        fa_half_star = context.getString(R.string.fa_star_half_o);
+        fa_full_star = context.getString(R.string.fa_star);
+
+        primaryColor = ColorHelper.palette[10];
+        backgroundColor = Color.argb(255, 255, 255, 255);
+        timesColor = Color.argb(128, 255, 255, 255);
+        darkGrey = Color.argb(64, 0, 0, 0);
+
+        rect = new Rect();
+        check_status = 2;
+        star_status = 0;
+        label = "Wake up early";
+    }
+
+    public void setHabit(Habit habit)
+    {
+        this.check_status = habit.getCurrentCheckmarkStatus();
+        this.star_status = habit.getCurrentStarStatus();
+        this.primaryColor = Color.argb(230, Color.red(habit.color), Color.green(habit.color), Color.blue(habit.color));
+        this.label = habit.name;
+        updateLabel();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas)
+    {
+        super.onDraw(canvas);
+
+        drawBackground(canvas);
+        drawCheckmark(canvas);
+        drawLabel(canvas);
+    }
+
+    private void drawBackground(Canvas canvas)
+    {
+        int color = (check_status == 2 ? primaryColor : darkGrey);
+
+        pCard.setColor(color);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
+        {
+            canvas.drawRoundRect(leftMargin, topMargin, width - leftMargin, height - topMargin, padding,
+                    padding, pCard);
+        }
+        else
+        {
+            canvas.drawRect(leftMargin, topMargin, width - leftMargin, height - topMargin, pCard);
+        }
+    }
+
+    private void drawCheckmark(Canvas canvas)
+    {
+        String text = (check_status == 0 ? fa_times : fa_check);
+        int color = (check_status == 2 ? Color.WHITE : timesColor);
+
+        pIcon.setColor(color);
+        pIcon.setTextSize(width * 0.5f);
+        pIcon.getTextBounds(text, 0, 1, rect);
+
+//        canvas.drawLine(0, 0.67f * height, width, 0.67f * height, pIcon);
+
+        int y = (int) ((0.67f * height - rect.bottom - rect.top) / 2);
+        canvas.drawText(text, width / 2, y, pIcon);
+    }
+
+    private void drawLabel(Canvas canvas)
+    {
+        canvas.save();
+        float y;
+        int nLines = labelLayout.getLineCount();
+
+        if(nLines == 1)
+            y = height * 0.8f - padding;
+        else
+            y = height * 0.7f - padding;
+
+        canvas.translate(leftMargin + padding, y);
+
+        labelLayout.draw(canvas);
+        canvas.restore();
+    }
+
+    @Override
+    protected void onMeasure(int width, int height)
+    {
+        super.onMeasure(width, height);
+        setMeasuredDimension(width, height);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh)
+    {
+        super.onSizeChanged(w, h, oldw, oldh);
+        updateSize(w, h);
+        updateLabel();
+    }
+
+    private void updateSize(int width, int height)
+    {
+        this.width = width;
+        this.height = height;
+
+        leftMargin = (int) (width * 0.015);
+        topMargin = (int) (height * 0.015);
+        padding = 8 * leftMargin;
+        textPaint.setTextSize(0.15f * width);
+    }
+
+    private void updateLabel()
+    {
+        textPaint.setColor(Color.WHITE);
+        labelLayout = new StaticLayout(label, textPaint, width - 2 * leftMargin - 2 * padding,
+                Layout.Alignment.ALIGN_CENTER, 1.0f, 0.0f, false);
+    }
+
+}

app/src/main/java/org/isoron/uhabits/views/HabitHistoryView.java

@@ -26,7 +26,6 @@ import android.util.AttributeSet;
 
 import org.isoron.helpers.ColorHelper;
 import org.isoron.helpers.DateHelper;
-import org.isoron.uhabits.R;
 import org.isoron.uhabits.models.Habit;
 
 import java.text.SimpleDateFormat;
@@ -45,6 +44,11 @@ public class HabitHistoryView extends ScrollableDataView
     private float squareTextOffset;
     private float headerTextOffset;
 
+    private int columnWidth;
+    private int columnHeight;
+    private int nColumns;
+    private int baseSize;
+
     private String wdays[];
     private SimpleDateFormat dfMonth;
     private SimpleDateFormat dfYear;
@@ -54,14 +58,12 @@ public class HabitHistoryView extends ScrollableDataView
     private int todayWeekday;
     private int colors[];
     private Rect baseLocation;
-    private int baseSize;
     private int primaryColor;
 
     public HabitHistoryView(Context context, AttributeSet attrs)
     {
         super(context, attrs);
         this.primaryColor = ColorHelper.palette[7];
-        this.baseSize = (int) context.getResources().getDimension(R.dimen.small_square_size);
         init();
     }
 
@@ -76,7 +78,6 @@ public class HabitHistoryView extends ScrollableDataView
 
     private void init()
     {
-        setDimensions(this.baseSize);
         createPaints();
         createColors();
 
@@ -90,7 +91,7 @@ public class HabitHistoryView extends ScrollableDataView
     private void updateDate()
     {
         baseDate = new GregorianCalendar();
-        baseDate.add(Calendar.DAY_OF_YEAR, -(dataOffset - 1) * 7);
+        baseDate.add(Calendar.DAY_OF_YEAR, -(getDataOffset() - 1) * 7);
 
         nDays = (nColumns - 1) * 7;
         todayWeekday = new GregorianCalendar().get(Calendar.DAY_OF_WEEK) % 7;
@@ -100,16 +101,42 @@ public class HabitHistoryView extends ScrollableDataView
     }
 
     @Override
-    protected void onSizeChanged(int w, int h, int oldw, int oldh)
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
     {
-        super.onSizeChanged(w, h, oldw, oldh);
+        int width = MeasureSpec.getSize(widthMeasureSpec);
+        int height = MeasureSpec.getSize(heightMeasureSpec);
+
+        int b = height / 8;
+        height = b * 8;
+        width = (width / b) * b;
+
+        setMeasuredDimension(width, height);
+    }
+
+    @Override
+    protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight)
+    {
+        baseSize = height / 8;
+        setScrollerBucketSize(baseSize);
+
+        columnWidth = baseSize;
+        columnHeight = 8 * baseSize;
+        nColumns = width / baseSize;
+
+        squareSpacing = baseSize / 10;
+        pSquareFg.setTextSize(baseSize * 0.5f);
+        pTextHeader.setTextSize(baseSize * 0.5f);
+        squareTextOffset = pSquareFg.getFontSpacing() * 0.4f;
+        headerTextOffset = pTextHeader.getFontSpacing() * 0.3f;
+
         updateDate();
     }
 
     private void createColors()
     {
-        int primaryColorBright = ColorHelper.mixColors(primaryColor, Color.WHITE, 0.5f);
+        int primaryColorBright = Color.argb(127, Color.red(primaryColor), Color.green(primaryColor),
-        int grey = Color.rgb(230, 230, 230);
+                Color.blue(primaryColor));
+        int grey = Color.argb(25, 0, 0, 0);
 
         colors = new int[3];
         colors[0] = grey;
@@ -117,19 +144,11 @@ public class HabitHistoryView extends ScrollableDataView
         colors[2] = primaryColor;
     }
 
-    private void setDimensions(int baseSize)
+    protected void createPaints()
-    {
-        columnWidth = baseSize;
-        columnHeight = 8 * baseSize;
-        squareSpacing = 2;
-    }
-
-    private void createPaints()
     {
         pTextHeader = new Paint();
-        pTextHeader.setColor(Color.LTGRAY);
+        pTextHeader.setColor(Color.argb(64, 0, 0, 0));
         pTextHeader.setTextAlign(Align.LEFT);
-        pTextHeader.setTextSize(columnWidth * 0.5f);
         pTextHeader.setAntiAlias(true);
 
         pSquareBg = new Paint();
@@ -138,11 +157,7 @@ public class HabitHistoryView extends ScrollableDataView
         pSquareFg = new Paint();
         pSquareFg.setColor(Color.WHITE);
         pSquareFg.setAntiAlias(true);
-        pSquareFg.setTextSize(columnWidth * 0.5f);
         pSquareFg.setTextAlign(Align.CENTER);
-
-        squareTextOffset = pSquareFg.getFontSpacing() * 0.4f;
-        headerTextOffset = pTextHeader.getFontSpacing() * 0.3f;
     }
 
     protected void fetchData()
@@ -203,7 +218,7 @@ public class HabitHistoryView extends ScrollableDataView
         for (int column = 0; column < nColumns - 1; column++)
         {
             drawColumn(canvas, baseLocation, currentDate, column);
-            baseLocation.offset(columnWidth, -columnHeight);
+            baseLocation.offset(columnWidth, - columnHeight);
         }
 
         drawAxis(canvas, baseLocation);
@@ -216,9 +231,9 @@ public class HabitHistoryView extends ScrollableDataView
 
         for (int j = 0; j < 7; j++)
         {
-            if (!(column == nColumns - 2 && dataOffset == 0 && j > todayWeekday))
+            if (!(column == nColumns - 2 && getDataOffset() == 0 && j > todayWeekday))
             {
-                int checkmarkOffset = dataOffset * 7 + nDays - 7 * (column + 1) + todayWeekday - j;
+                int checkmarkOffset = getDataOffset() * 7 + nDays - 7 * (column + 1) + todayWeekday - j;
                 drawSquare(canvas, location, date, checkmarkOffset);
             }
 
@@ -248,6 +263,8 @@ public class HabitHistoryView extends ScrollableDataView
         }
     }
 
+    private boolean justSkippedColumn = false;
+
     private void drawColumnHeader(Canvas canvas, Rect location, GregorianCalendar date)
     {
         String month = dfMonth.format(date.getTime());
@@ -256,21 +273,32 @@ public class HabitHistoryView extends ScrollableDataView
         if (!month.equals(previousMonth))
         {
             int offset = 0;
-            if (justPrintedYear) offset += columnWidth;
+            if (justPrintedYear)
+            {
+                offset += columnWidth;
+                justSkippedColumn = true;
+            }
 
             canvas.drawText(month, location.left + offset, location.bottom - headerTextOffset,
                     pTextHeader);
+
             previousMonth = month;
             justPrintedYear = false;
         }
         else if (!year.equals(previousYear))
         {
-            canvas.drawText(year, location.left, location.bottom - headerTextOffset, pTextHeader);
+            if(!justSkippedColumn)
-            previousYear = year;
+            {
-            justPrintedYear = true;
+                canvas.drawText(year, location.left, location.bottom - headerTextOffset, pTextHeader);
+                previousYear = year;
+                justPrintedYear = true;
+            }
+
+            justSkippedColumn = false;
         }
         else
         {
+            justSkippedColumn = false;
             justPrintedYear = false;
         }
     }

app/src/main/java/org/isoron/uhabits/views/HabitScoreView.java

@@ -20,12 +20,13 @@ import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
 import android.graphics.RectF;
 import android.util.AttributeSet;
 
 import org.isoron.helpers.ColorHelper;
 import org.isoron.helpers.DateHelper;
-import org.isoron.uhabits.R;
 import org.isoron.uhabits.models.Habit;
 
 import java.text.SimpleDateFormat;
@@ -35,6 +36,10 @@ import java.util.Random;
 public class HabitScoreView extends ScrollableDataView
 {
     public static final int BUCKET_SIZE = 7;
+    public static final PorterDuffXfermode XFERMODE_CLEAR =
+            new PorterDuffXfermode(PorterDuff.Mode.CLEAR);
+    public static final PorterDuffXfermode XFERMODE_SRC =
+            new PorterDuffXfermode(PorterDuff.Mode.SRC);
 
     private Paint pGrid;
     private float em;
@@ -46,14 +51,18 @@ public class HabitScoreView extends ScrollableDataView
     private RectF rect, prevRect;
     private int baseSize;
 
+    private int columnWidth;
+    private int columnHeight;
+    private int nColumns;
+
     private int[] colors;
     private int[] scores;
     private int primaryColor;
+    private boolean isBackgroundTransparent;
 
     public HabitScoreView(Context context, AttributeSet attrs)
     {
         super(context, attrs);
-        this.baseSize = (int) context.getResources().getDimension(R.dimen.small_square_size);
         this.primaryColor = ColorHelper.palette[7];
         init();
     }
@@ -69,7 +78,6 @@ public class HabitScoreView extends ScrollableDataView
     private void init()
     {
         createPaints();
-        setDimensions();
         createColors();
 
         dfMonth = new SimpleDateFormat("MMM", Locale.getDefault());
@@ -79,15 +87,6 @@ public class HabitScoreView extends ScrollableDataView
         prevRect = new RectF();
     }
 
-    private void setDimensions()
-    {
-        this.columnWidth = baseSize;
-        columnHeight = 8 * baseSize;
-        headerHeight = baseSize;
-        footerHeight = baseSize;
-        em = pText.getFontSpacing();
-    }
-
     private void createColors()
     {
         colors = new int[4];
@@ -98,24 +97,54 @@ public class HabitScoreView extends ScrollableDataView
         colors[2] = ColorHelper.mixColors(colors[0], colors[3], 0.33f);
     }
 
-    private void createPaints()
+    protected void createPaints()
     {
         pText = new Paint();
-        pText.setColor(Color.LTGRAY);
+        pText.setColor(Color.argb(64, 0, 0, 0));
         pText.setTextAlign(Paint.Align.LEFT);
-        pText.setTextSize(baseSize * 0.5f);
         pText.setAntiAlias(true);
 
         pGraph = new Paint();
         pGraph.setTextAlign(Paint.Align.CENTER);
-        pGraph.setTextSize(baseSize * 0.5f);
         pGraph.setAntiAlias(true);
-        pGraph.setStrokeWidth(baseSize * 0.1f);
 
         pGrid = new Paint();
-        pGrid.setColor(Color.LTGRAY);
+        pGrid.setColor(Color.argb(64, 0, 0, 0));
         pGrid.setAntiAlias(true);
+
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
+    {
+        int width = MeasureSpec.getSize(widthMeasureSpec);
+        int height = MeasureSpec.getSize(heightMeasureSpec);
+
+        if(height > 0)
+        {
+            int b = height / 9;
+            height = b * 9;
+            width = (width / b) * b;
+        }
+
+        setMeasuredDimension(width, height);
+    }
+
+    @Override
+    protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight)
+    {
+        baseSize = height / 9;
+        setScrollerBucketSize(baseSize);
+
+        columnWidth = baseSize;
+        columnHeight = 8 * baseSize;
+        nColumns = width / baseSize;
+
+        pText.setTextSize(baseSize * 0.5f);
+        pGraph.setTextSize(baseSize * 0.5f);
+        pGraph.setStrokeWidth(baseSize * 0.1f);
         pGrid.setStrokeWidth(baseSize * 0.05f);
+        em = pText.getFontSpacing();
     }
 
     protected void fetchData()
@@ -157,7 +186,6 @@ public class HabitScoreView extends ScrollableDataView
         float lineHeight = pText.getFontSpacing();
 
         rect.set(0, 0, nColumns * columnWidth, columnHeight);
-        rect.offset(0, headerHeight);
         drawGrid(canvas, rect);
 
         String previousMonth = "";
@@ -167,7 +195,7 @@ public class HabitScoreView extends ScrollableDataView
 
         long currentDate = DateHelper.getStartOfToday();
 
-        for(int k = 0; k < nColumns + dataOffset - 1; k++)
+        for(int k = 0; k < nColumns + getDataOffset() - 1; k++)
             currentDate -= 7 * DateHelper.millisecondsInOneDay;
 
         for (int k = 0; k < nColumns; k++)
@@ -176,15 +204,14 @@ public class HabitScoreView extends ScrollableDataView
             String day = dfDay.format(currentDate);
 
             int score = 0;
-            int offset = nColumns - k - 1 + dataOffset;
+            int offset = nColumns - k - 1 + getDataOffset();
             if(offset < scores.length) score = scores[offset];
 
             double sRelative = ((double) score) / Habit.MAX_SCORE;
             int height = (int) (columnHeight * sRelative);
 
-            rect.set(0, 0, columnWidth, columnWidth);
+            rect.set(0, 0, baseSize, baseSize);
-            rect.offset(k * columnWidth,
+            rect.offset(k * columnWidth, columnHeight - height - columnWidth / 2);
-                    headerHeight + columnHeight - height - columnWidth / 2);
 
             if (!prevRect.isEmpty())
             {
@@ -197,7 +224,7 @@ public class HabitScoreView extends ScrollableDataView
             prevRect.set(rect);
 
             rect.set(0, 0, columnWidth, columnHeight);
-            rect.offset(k * columnWidth, headerHeight);
+            rect.offset(k * columnWidth, 0);
             if (!month.equals(previousMonth))
                 canvas.drawText(month, rect.centerX(), rect.bottom + lineHeight * 1.2f, pText);
             else
@@ -213,7 +240,7 @@ public class HabitScoreView extends ScrollableDataView
         int nRows = 5;
         float rowHeight = rGrid.height() / nRows;
 
-        pGrid.setColor(Color.rgb(240, 240, 240));
+        pGrid.setColor(Color.argb(20, 0, 0, 0));
         for (int i = 0; i < nRows; i++)
         {
             canvas.drawText(String.format("%d%%", (100 - i * 100 / nRows)), rGrid.left + 0.5f * em,
@@ -235,15 +262,31 @@ public class HabitScoreView extends ScrollableDataView
     private void drawMarker(Canvas canvas, RectF rect)
     {
         rect.inset(columnWidth * 0.15f, columnWidth * 0.15f);
-        pGraph.setColor(Color.WHITE);
+        setModeOrColor(pGraph, XFERMODE_CLEAR, Color.WHITE);
         canvas.drawOval(rect, pGraph);
 
         rect.inset(columnWidth * 0.1f, columnWidth * 0.1f);
-        pGraph.setColor(primaryColor);
+        setModeOrColor(pGraph, XFERMODE_SRC, primaryColor);
         canvas.drawOval(rect, pGraph);
 
         rect.inset(columnWidth * 0.1f, columnWidth * 0.1f);
-        pGraph.setColor(Color.WHITE);
+        setModeOrColor(pGraph, XFERMODE_CLEAR, Color.WHITE);
         canvas.drawOval(rect, pGraph);
+
+        if(isBackgroundTransparent)
+            pGraph.setXfermode(XFERMODE_SRC);
+    }
+
+    public void setIsBackgroundTransparent(boolean isBackgroundTransparent)
+    {
+        this.isBackgroundTransparent = isBackgroundTransparent;
+    }
+
+    private void setModeOrColor(Paint p, PorterDuffXfermode mode, int color)
+    {
+        if(isBackgroundTransparent)
+            p.setXfermode(mode);
+        else
+            p.setColor(color);
     }
 }

app/src/main/java/org/isoron/uhabits/views/HabitStreakView.java

@@ -43,6 +43,11 @@ public class HabitStreakView extends ScrollableDataView
     private long[] endTimes;
     private long[] lengths;
 
+    private int columnWidth;
+    private int columnHeight;
+    private int headerHeight;
+    private int nColumns;
+
     private long maxStreakLength;
     private int[] colors;
     private SimpleDateFormat dfMonth;
@@ -53,7 +58,6 @@ public class HabitStreakView extends ScrollableDataView
     public HabitStreakView(Context context, AttributeSet attrs)
     {
         super(context, attrs);
-        this.baseSize = (int) context.getResources().getDimension(R.dimen.small_square_size);
         this.primaryColor = ColorHelper.palette[7];
         init();
     }
@@ -62,6 +66,7 @@ public class HabitStreakView extends ScrollableDataView
     {
         this.habit = habit;
         this.primaryColor = habit.color;
+
         createColors();
         fetchData();
         postInvalidate();
@@ -69,7 +74,6 @@ public class HabitStreakView extends ScrollableDataView
 
     private void init()
     {
-        setDimensions(baseSize);
         createPaints();
         createColors();
 
@@ -77,34 +81,54 @@ public class HabitStreakView extends ScrollableDataView
         rect = new Rect();
     }
 
-    private void setDimensions(int baseSize)
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
     {
-        this.columnWidth = baseSize;
+        int width = MeasureSpec.getSize(widthMeasureSpec);
+        int height = MeasureSpec.getSize(heightMeasureSpec);
+
+        int b = height / 10;
+        height = b * 10;
+        width = (width / b) * b;
+
+        setMeasuredDimension(width, height);
+    }
+
+    @Override
+    protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight)
+    {
+        baseSize = height / 10;
+        setScrollerBucketSize(baseSize);
+
+        columnWidth = baseSize;
         columnHeight = 8 * baseSize;
         headerHeight = baseSize;
-        footerHeight = baseSize;
+        nColumns = width / baseSize - 1;
+
+        pText.setTextSize(baseSize * 0.5f);
+        pBar.setTextSize(baseSize * 0.5f);
     }
 
     private void createColors()
     {
         colors = new int[4];
-        colors[0] = Color.rgb(230, 230, 230);
         colors[3] = primaryColor;
-        colors[1] = ColorHelper.mixColors(colors[0], colors[3], 0.66f);
+        colors[1] = Color.argb(80, Color.red(primaryColor), Color.green(primaryColor), Color.blue(
-        colors[2] = ColorHelper.mixColors(colors[0], colors[3], 0.33f);
+                primaryColor));
+        colors[2] = Color.argb(170, Color.red(primaryColor), Color.green(primaryColor),
+                Color.blue(primaryColor));
+        colors[0] = Color.argb(30, 0, 0, 0);
     }
 
-    private void createPaints()
+    protected void createPaints()
     {
         pText = new Paint();
-        pText.setColor(Color.LTGRAY);
+        pText.setColor(Color.argb(64, 0, 0, 0));
         pText.setTextAlign(Paint.Align.CENTER);
-        pText.setTextSize(columnWidth * 0.5f);
         pText.setAntiAlias(true);
 
         pBar = new Paint();
         pBar.setTextAlign(Paint.Align.CENTER);
-        pBar.setTextSize(columnWidth * 0.5f);
         pBar.setAntiAlias(true);
     }
 
@@ -173,7 +197,7 @@ public class HabitStreakView extends ScrollableDataView
         float barHeaderOffset = lineHeight * 0.4f;
 
         int nStreaks = startTimes.length;
-        int start = nStreaks - nColumns - dataOffset;
+        int start = nStreaks - nColumns - getDataOffset();
 
         String previousMonth = "";
 

app/src/main/java/org/isoron/uhabits/views/ScrollableDataView.java

@@ -31,10 +31,8 @@ public abstract class ScrollableDataView extends View implements GestureDetector
         ValueAnimator.AnimatorUpdateListener
 {
 
-    protected int dataOffset;
+    private int dataOffset;
-    protected int nColumns;
+    private int scrollerBucketSize;
-    protected int columnWidth, columnHeight;
-    protected int headerHeight, footerHeight;
 
     private GestureDetector detector;
     private Scroller scroller;
@@ -68,21 +66,6 @@ public abstract class ScrollableDataView extends View implements GestureDetector
         return detector.onTouchEvent(event);
     }
 
-    @Override
-    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
-    {
-        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-        setMeasuredDimension(getMeasuredWidth(), columnHeight + headerHeight + footerHeight);
-    }
-
-    @Override
-    protected void onSizeChanged(int w, int h, int oldw, int oldh)
-    {
-        super.onSizeChanged(w, h, oldw, oldh);
-        nColumns = w / columnWidth;
-        fetchData();
-    }
-
     @Override
     public boolean onDown(MotionEvent e)
     {
@@ -104,13 +87,17 @@ public abstract class ScrollableDataView extends View implements GestureDetector
     @Override
     public boolean onScroll(MotionEvent e1, MotionEvent e2, float dx, float dy)
     {
+        if(scrollerBucketSize == 0)
+            return false;
+
         if(Math.abs(dx) > Math.abs(dy))
             getParent().requestDisallowInterceptTouchEvent(true);
 
         scroller.startScroll(scroller.getCurrX(), scroller.getCurrY(), (int) -dx, (int) dy, 0);
         scroller.computeScrollOffset();
-        dataOffset = Math.max(0, scroller.getCurrX() / columnWidth);
+        dataOffset = Math.max(0, scroller.getCurrX() / scrollerBucketSize);
         postInvalidate();
+
         return true;
     }
 
@@ -139,7 +126,7 @@ public abstract class ScrollableDataView extends View implements GestureDetector
         if (!scroller.isFinished())
         {
             scroller.computeScrollOffset();
-            dataOffset = Math.max(0, scroller.getCurrX() / columnWidth);
+            dataOffset = Math.max(0, scroller.getCurrX() / scrollerBucketSize);
             postInvalidate();
         }
         else
@@ -147,4 +134,14 @@ public abstract class ScrollableDataView extends View implements GestureDetector
             scrollAnimator.cancel();
         }
     }
+
+    public int getDataOffset()
+    {
+        return dataOffset;
+    }
+
+    public void setScrollerBucketSize(int scrollerBucketSize)
+    {
+        this.scrollerBucketSize = scrollerBucketSize;
+    }
 }

app/src/main/java/org/isoron/uhabits/widgets/BaseWidgetProvider.java

@@ -0,0 +1,120 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.widgets;
+
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.Bitmap;
+import android.os.Build;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.util.Log;
+import android.view.View;
+import android.widget.RemoteViews;
+
+import org.isoron.helpers.DialogHelper;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+
+public abstract class BaseWidgetProvider extends AppWidgetProvider
+{
+
+    protected abstract int getDefaultHeight();
+
+    protected abstract int getDefaultWidth();
+
+    protected abstract PendingIntent getOnClickPendingIntent(Context context, Habit habit);
+
+    protected abstract  int getLayoutId();
+
+    protected abstract View buildCustomView(Context context, int max_height, int max_width,
+                                            Habit habit);
+
+    public static String getHabitIdKey(long widgetId)
+    {
+        return String.format("widget-%06d-habit", widgetId);
+    }
+
+    @Override
+    public void onDeleted(Context context, int[] appWidgetIds)
+    {
+        Context appContext = context.getApplicationContext();
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(appContext);
+
+        for(Integer id : appWidgetIds)
+            prefs.edit().remove(getHabitIdKey(id));
+    }
+
+    @Override
+    public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager,
+                                          int appWidgetId, Bundle newOptions)
+    {
+        updateWidget(context, appWidgetManager, appWidgetId, newOptions);
+    }
+
+    @Override
+    public void onUpdate(Context context, AppWidgetManager manager, int[] appWidgetIds)
+    {
+        for(int id : appWidgetIds)
+        {
+            Bundle options = null;
+
+            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN)
+                options = manager.getAppWidgetOptions(id);
+
+            updateWidget(context, manager, id, options);
+        }
+    }
+
+    private void updateWidget(Context context, AppWidgetManager manager, int widgetId, Bundle options)
+    {
+        int maxWidth = getDefaultWidth();
+        int maxHeight = getDefaultHeight();
+
+        if (options != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
+        {
+            maxWidth = (int) DialogHelper.dpToPixels(context,
+                    options.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH));
+            maxHeight = (int) DialogHelper.dpToPixels(context,
+                    options.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT));
+        }
+
+        Context appContext = context.getApplicationContext();
+        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), getLayoutId());
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(appContext);
+
+        Long habitId = prefs.getLong(getHabitIdKey(widgetId), -1L);
+        if(habitId < 0) return;
+
+        Habit habit = Habit.get(habitId);
+        View widgetView = buildCustomView(context, maxHeight, maxWidth, habit);
+        widgetView.setDrawingCacheEnabled(true);
+        widgetView.buildDrawingCache(true);
+        Bitmap drawingCache = widgetView.getDrawingCache();
+
+        remoteViews.setTextViewText(R.id.label, habit.name);
+        remoteViews.setImageViewBitmap(R.id.imageView, drawingCache);
+
+        PendingIntent onClickIntent = getOnClickPendingIntent(context, habit);
+        if(onClickIntent != null) remoteViews.setOnClickPendingIntent(R.id.imageView, onClickIntent);
+
+        manager.updateAppWidget(widgetId, remoteViews);
+    }
+}

app/src/main/java/org/isoron/uhabits/widgets/CheckmarkWidgetProvider.java

@@ -0,0 +1,69 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.widgets;
+
+import android.app.PendingIntent;
+import android.content.Context;
+import android.view.View;
+
+import org.isoron.uhabits.HabitBroadcastReceiver;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.views.CheckmarkView;
+
+public class CheckmarkWidgetProvider extends  BaseWidgetProvider
+{
+    @Override
+    protected View buildCustomView(Context context, int maxHeight, int maxWidth, Habit habit)
+    {
+        CheckmarkView widgetView = new CheckmarkView(context);
+
+        widgetView.setHabit(habit);
+        widgetView.measure(maxWidth, maxHeight);
+        widgetView.layout(0, 0, maxWidth, maxHeight);
+
+        int width = widgetView.getMeasuredWidth();
+        int height = widgetView.getMeasuredHeight();
+        widgetView.measure(width, height);
+        widgetView.layout(0, 0, width, height);
+
+        return widgetView;
+    }
+
+    @Override
+    protected PendingIntent getOnClickPendingIntent(Context context, Habit habit)
+    {
+        return HabitBroadcastReceiver.buildCheckIntent(context, habit, null);
+    }
+
+    @Override
+    protected int getDefaultHeight()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getDefaultWidth()
+    {
+        return 160;
+    }
+
+    @Override
+    protected int getLayoutId()
+    {
+        return R.layout.widget_checkmark;
+    }
+}

app/src/main/java/org/isoron/uhabits/widgets/HabitPickerDialog.java

@@ -0,0 +1,90 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.widgets;
+
+import android.app.Activity;
+import android.appwidget.AppWidgetManager;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+import org.isoron.uhabits.MainActivity;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.widgets.BaseWidgetProvider;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class HabitPickerDialog extends Activity implements AdapterView.OnItemClickListener
+{
+
+    private Integer widgetId;
+    private ArrayList<Long> habitIds;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.widget_configure_activity);
+
+        Intent intent = getIntent();
+        Bundle extras = intent.getExtras();
+
+        if (extras != null) widgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,
+                AppWidgetManager.INVALID_APPWIDGET_ID);
+
+        ListView listView = (ListView) findViewById(R.id.listView);
+
+        habitIds = new ArrayList<>();
+        ArrayList<String> habitNames = new ArrayList<>();
+
+        List<Habit> habits = Habit.getAll(false);
+        for(Habit h : habits)
+        {
+            habitIds.add(h.getId());
+            habitNames.add(h.name);
+        }
+
+        ArrayAdapter<String> adapter =
+                new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, habitNames);
+        listView.setAdapter(adapter);
+        listView.setOnItemClickListener(this);
+    }
+
+    @Override
+    public void onItemClick(AdapterView<?> parent, View view, int position, long id)
+    {
+        Long habitId = habitIds.get(position);
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(
+                getApplicationContext());
+        prefs.edit().putLong(BaseWidgetProvider.getHabitIdKey(widgetId), habitId).commit();
+
+        MainActivity.updateWidgets(this);
+
+        Intent resultValue = new Intent();
+        resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
+        setResult(RESULT_OK, resultValue);
+        finish();
+    }
+
+}

app/src/main/java/org/isoron/uhabits/widgets/HistoryWidgetProvider.java

@@ -0,0 +1,69 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.widgets;
+
+import android.app.PendingIntent;
+import android.content.Context;
+import android.view.View;
+
+import org.isoron.helpers.DialogHelper;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.views.HabitHistoryView;
+
+public class HistoryWidgetProvider extends  BaseWidgetProvider
+{
+    @Override
+    protected View buildCustomView(Context context, int maxHeight, int maxWidth, Habit habit)
+    {
+        HabitHistoryView view = new HabitHistoryView(context, null);
+        view.setHabit(habit);
+        view.measure(maxWidth, maxHeight);
+        view.layout(0, 0, maxWidth, maxHeight);
+
+        int width = view.getMeasuredWidth();
+        int height = view.getMeasuredHeight();
+        height -= DialogHelper.dpToPixels(context, 12);
+        view.measure(width, height);
+        view.layout(0, 0, width, height);
+
+        return view;
+    }
+
+    @Override
+    protected PendingIntent getOnClickPendingIntent(Context context, Habit habit)
+    {
+        return null;
+    }
+
+    @Override
+    protected int getDefaultHeight()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getDefaultWidth()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getLayoutId()
+    {
+        return R.layout.widget_graph;
+    }
+}

app/src/main/java/org/isoron/uhabits/widgets/ScoreWidgetProvider.java

@@ -0,0 +1,70 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.widgets;
+
+import android.app.PendingIntent;
+import android.content.Context;
+import android.view.View;
+
+import org.isoron.helpers.DialogHelper;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.views.HabitScoreView;
+
+public class ScoreWidgetProvider extends  BaseWidgetProvider
+{
+    @Override
+    protected View buildCustomView(Context context, int maxHeight, int maxWidth, Habit habit)
+    {
+        HabitScoreView view = new HabitScoreView(context, null);
+        view.setIsBackgroundTransparent(true);
+        view.setHabit(habit);
+        view.measure(maxWidth, maxHeight);
+        view.layout(0, 0, maxWidth, maxHeight);
+
+        int width = view.getMeasuredWidth();
+        int height = view.getMeasuredHeight();
+        height -= DialogHelper.dpToPixels(context, 12);
+        view.measure(width, height);
+        view.layout(0, 0, width, height);
+
+        return view;
+    }
+
+    @Override
+    protected PendingIntent getOnClickPendingIntent(Context context, Habit habit)
+    {
+        return null;
+    }
+
+    @Override
+    protected int getDefaultHeight()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getDefaultWidth()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getLayoutId()
+    {
+        return R.layout.widget_graph;
+    }
+}

app/src/main/java/org/isoron/uhabits/widgets/StreakWidgetProvider.java

@@ -0,0 +1,70 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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.widgets;
+
+import android.app.PendingIntent;
+import android.content.Context;
+import android.view.View;
+
+import org.isoron.helpers.DialogHelper;
+import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.views.HabitScoreView;
+import org.isoron.uhabits.views.HabitStreakView;
+
+public class StreakWidgetProvider extends  BaseWidgetProvider
+{
+    @Override
+    protected View buildCustomView(Context context, int maxHeight, int maxWidth, Habit habit)
+    {
+        HabitStreakView view = new HabitStreakView(context, null);
+        view.setHabit(habit);
+        view.measure(maxWidth, maxHeight);
+        view.layout(0, 0, maxWidth, maxHeight);
+
+        int width = view.getMeasuredWidth();
+        int height = view.getMeasuredHeight();
+        height -= DialogHelper.dpToPixels(context, 12);
+        view.measure(width, height);
+        view.layout(0, 0, width, height);
+
+        return view;
+    }
+
+    @Override
+    protected PendingIntent getOnClickPendingIntent(Context context, Habit habit)
+    {
+        return null;
+    }
+
+    @Override
+    protected int getDefaultHeight()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getDefaultWidth()
+    {
+        return 200;
+    }
+
+    @Override
+    protected int getLayoutId()
+    {
+        return R.layout.widget_graph;
+    }
+}

app/src/main/res/drawable/widget_background.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="#3fffffff" />
+    <corners android:radius="10dp" />
+</shape>

app/src/main/res/layout/list_habits_item.xml

@@ -12,7 +12,7 @@
             style="@style/habitsListStarStyle" />
 
         <TextView
-            android:id="@+id/tvName"
+            android:id="@+id/label"
             style="@style/habitsListNameStyle" />
 
         <LinearLayout

app/src/main/res/layout/show_habit.xml

@@ -11,7 +11,6 @@
         tools:context="org.isoron.uhabits.ShowHabitActivity">
 
         <LinearLayout
-            android:id="@+id/llOverview"
             style="@style/cardStyle"
             android:gravity="center">
 
@@ -28,10 +27,7 @@
 
         </LinearLayout>
 
-        <LinearLayout
+        <LinearLayout style="@style/cardStyle">
-            android:id="@+id/llStrength"
-            style="@style/cardStyle"
-            android:gravity="center">
 
             <TextView
                 android:id="@+id/tvStrength"
@@ -41,7 +37,7 @@
             <org.isoron.uhabits.views.HabitScoreView
                 android:id="@+id/scoreView"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"/>
+                android:layout_height="200dp"/>
 
         </LinearLayout>
 
@@ -61,7 +57,7 @@
             <org.isoron.uhabits.views.HabitHistoryView
                 android:id="@+id/historyView"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"/>
+                android:layout_height="180dp"/>
 
         </LinearLayout>
 
@@ -81,7 +77,7 @@
             <org.isoron.uhabits.views.HabitStreakView
                 android:id="@+id/streakView"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"/>
+                android:layout_height="200dp"/>
         </LinearLayout>
     </LinearLayout>
 </ScrollView>

app/src/main/res/layout/small_widget_preview.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical"
+    android:padding="4dp">
+
+    <org.isoron.uhabits.views.CheckmarkView
+        android:id="@+id/imageView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:adjustViewBounds="true"
+        />
+
+</LinearLayout>

app/src/main/res/layout/widget_checkmark.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical"
+    android:padding="4dp">
+
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:adjustViewBounds="true"
+        />
+
+</LinearLayout>

app/src/main/res/layout/widget_configure_activity.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ListView android:id="@+id/listView"
+          xmlns:android="http://schemas.android.com/apk/res/android"
+          android:layout_width="match_parent"
+          android:layout_height="match_parent"
+          android:orientation="vertical">
+
+</ListView>

app/src/main/res/layout/widget_graph.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/widget_background"
+    android:gravity="center"
+    android:orientation="vertical"
+    android:paddingTop="4dp"
+    android:paddingLeft="10dp"
+    android:paddingRight="0dp">
+
+    <TextView
+        android:id="@+id/label"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="Wake up early"
+        android:textColor="#3f000000"/>
+
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:adjustViewBounds="true"
+        />
+
+
+</LinearLayout>

app/src/main/res/xml/widget_checkmark_info.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minHeight="40dp"
+                    android:minWidth="40dp"
+                    android:initialLayout="@layout/widget_checkmark"
+                    android:previewImage="@mipmap/ic_small_widget_preview"
+                    android:resizeMode="none"
+                    android:updatePeriodMillis="3600000"
+                    android:configure="org.isoron.uhabits.widgets.HabitPickerDialog"
+                    android:widgetCategory="home_screen">
+
+
+</appwidget-provider>

app/src/main/res/xml/widget_history_info.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minHeight="80dp"
+                    android:minWidth="80dp"
+                    android:minResizeWidth="40dp"
+                    android:minResizeHeight="40dp"
+                    android:initialLayout="@layout/widget_graph"
+                    android:previewImage="@mipmap/ic_small_widget_preview"
+                    android:resizeMode="vertical|horizontal"
+                    android:updatePeriodMillis="3600000"
+                    android:configure="org.isoron.uhabits.widgets.HabitPickerDialog"
+                    android:widgetCategory="home_screen">
+
+
+</appwidget-provider>

app/src/main/res/xml/widget_score_info.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minHeight="80dp"
+                    android:minWidth="80dp"
+                    android:minResizeWidth="40dp"
+                    android:minResizeHeight="40dp"
+                    android:initialLayout="@layout/widget_graph"
+                    android:previewImage="@mipmap/ic_small_widget_preview"
+                    android:resizeMode="vertical|horizontal"
+                    android:updatePeriodMillis="3600000"
+                    android:configure="org.isoron.uhabits.widgets.HabitPickerDialog"
+                    android:widgetCategory="home_screen">
+
+
+</appwidget-provider>

app/src/main/res/xml/widget_streak_info.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minHeight="80dp"
+                    android:minWidth="80dp"
+                    android:minResizeWidth="40dp"
+                    android:minResizeHeight="40dp"
+                    android:initialLayout="@layout/widget_graph"
+                    android:previewImage="@mipmap/ic_small_widget_preview"
+                    android:resizeMode="vertical|horizontal"
+                    android:updatePeriodMillis="3600000"
+                    android:configure="org.isoron.uhabits.widgets.HabitPickerDialog"
+                    android:widgetCategory="home_screen">
+
+</appwidget-provider>