Load data asynchronously; cache checkmarks and streaks

app/src/main/AndroidManifest.xml

@@ -21,7 +21,7 @@
 
         <meta-data
             android:name="AA_DB_VERSION"
-            android:value="7"/>
+            android:value="9"/>
 
         <meta-data
             android:name="com.google.android.backup.api_key"

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

@@ -29,7 +29,7 @@ public abstract class DialogHelper
 
 	public static interface OnSavedListener
 	{
-		public void onSaved(Command command);
+		public void onSaved(Command command, Object savedObject);
 	}
 
 	public static void showSoftKeyboard(View view)

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

@@ -2,6 +2,7 @@ package org.isoron.helpers;
 
 import android.app.Activity;
 import android.app.backup.BackupManager;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.widget.Toast;
 
@@ -26,10 +27,9 @@ abstract public class ReplayableActivity extends Activity
         redoList = new LinkedList<>();
     }
 
-    public void executeCommand(Command command)
+    public void executeCommand(Command command, Long refreshKey)
     {
-        executeCommand(command, false);
-        BackupManager.dataChanged("org.isoron.uhabits");
+        executeCommand(command, false, refreshKey);
     }
 
     protected void undo()
@@ -54,7 +54,7 @@ abstract public class ReplayableActivity extends Activity
             return;
         }
         Command last = redoList.pop();
-        executeCommand(last, false);
+        executeCommand(last, false, null);
     }
 
     public void showToast(Integer stringId)
@@ -65,14 +65,36 @@ abstract public class ReplayableActivity extends Activity
         toast.show();
     }
 
-
-    public void executeCommand(Command command, boolean clearRedoStack)
+    public void executeCommand(final Command command, Boolean clearRedoStack,
+                               final Long refreshKey)
     {
         undoList.push(command);
+
         if (undoList.size() > MAX_UNDO_LEVEL) undoList.removeLast();
         if (clearRedoStack) redoList.clear();
 
-        command.execute();
+        new AsyncTask<Void, Void, Void>()
+        {
+            @Override
+            protected Void doInBackground(Void... params)
+            {
+                command.execute();
+                return null;
+            }
+
+            @Override
+            protected void onPostExecute(Void aVoid)
+            {
+                ReplayableActivity.this.onPostExecuteCommand(refreshKey);
+                BackupManager.dataChanged("org.isoron.uhabits");
+            }
+        }.execute();
+
+
         showToast(command.getExecuteStringId());
     }
+
+    public void onPostExecuteCommand(Long refreshKey)
+    {
+    }
 }

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

@@ -6,6 +6,7 @@ import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 
@@ -33,6 +34,7 @@ public class MainActivity extends ReplayableActivity
         ReminderHelper.createReminderAlarms(MainActivity.this);
 
         showTutorial();
+
     }
 
     private void showTutorial()
@@ -51,13 +53,6 @@ public class MainActivity extends ReplayableActivity
         }
     }
 
-    @Override
-    protected void onStart()
-    {
-        super.onStart();
-        listHabitsFragment.notifyDataSetChanged();
-    }
-
     @Override
     public boolean onCreateOptionsMenu(Menu menu)
     {
@@ -89,9 +84,8 @@ public class MainActivity extends ReplayableActivity
     }
 
     @Override
-    public void executeCommand(Command command)
+    public void onPostExecuteCommand(Long refreshKey)
     {
-        super.executeCommand(command);
-        listHabitsFragment.notifyDataSetChanged();
+        listHabitsFragment.onPostExecuteCommand(refreshKey);
     }
 }

app/src/main/java/org/isoron/uhabits/dialogs/EditHabitFragment.java

@@ -263,14 +263,19 @@ public class EditHabitFragment extends DialogFragment implements OnClickListener
 			editor.putInt("pref_default_habit_freq_den", modified_habit.freq_den);
 			editor.apply();
 
+			Habit savedHabit = null;
+
 			if(mode == EDIT_MODE)
+			{
 				command = originalHabit.new EditCommand(modified_habit);
+				savedHabit = originalHabit;
+			}
 
 			if(mode == CREATE_MODE)
 				command = new Habit.CreateCommand(modified_habit);
 
 			if(onSavedListener != null)
-				onSavedListener.onSaved(command);
+				onSavedListener.onSaved(command, savedHabit);
 
 			dismiss();
 		}

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

@@ -7,7 +7,9 @@ import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.graphics.Point;
 import android.graphics.Typeface;
+import android.os.AsyncTask;
 import android.os.Bundle;
+import android.os.Handler;
 import android.os.Vibrator;
 import android.preference.PreferenceManager;
 import android.util.DisplayMetrics;
@@ -30,6 +32,7 @@ import android.widget.BaseAdapter;
 import android.widget.Button;
 import android.widget.LinearLayout;
 import android.widget.LinearLayout.LayoutParams;
+import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import com.mobeta.android.dslv.DragSortController;
@@ -47,6 +50,7 @@ import org.isoron.uhabits.models.Habit;
 
 import java.util.Date;
 import java.util.GregorianCalendar;
+import java.util.HashMap;
 import java.util.Locale;
 import java.util.TimeZone;
 
@@ -54,6 +58,9 @@ public class ListHabitsFragment extends Fragment
         implements OnSavedListener, OnItemClickListener, OnLongClickListener, DropListener,
         OnClickListener
 {
+
+    public static final int INACTIVE_COLOR = Color.rgb(230, 230, 230);
+
     public interface OnHabitClickListener
     {
         void onHabitClicked(Habit habit);
@@ -67,23 +74,39 @@ public class ListHabitsFragment extends Fragment
     private int tvNameWidth;
     private int button_count;
     private View llEmpty;
+    private ProgressBar progressBar;
 
     private OnHabitClickListener habitClickListener;
     private boolean short_toggle_enabled;
 
+    private HashMap<Long, Habit> habits;
+    private HashMap<Integer, Habit> positionToHabit;
+    private HashMap<Long, int[]> checkmarks;
+    private HashMap<Long, Integer> scores;
+
+    private Long lastLoadedTimestamp = null;
+    private AsyncTask<Void, Integer, Void> currentFetchTask = null;
+
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState)
     {
-        View view = inflater.inflate(R.layout.list_habits_fragment, container, false);
-
         DisplayMetrics dm = getResources().getDisplayMetrics();
         int width = (int) (dm.widthPixels / dm.density);
         button_count = (int) ((width - 160) / 42);
         tvNameWidth = (int) ((width - 30 - button_count * 42) * dm.density);
 
+        habits = new HashMap<>();
+        positionToHabit = new HashMap<>();
+        checkmarks = new HashMap<>();
+        scores = new HashMap<>();
+
+        View view = inflater.inflate(R.layout.list_habits_fragment, container, false);
         tvNameHeader = (TextView) view.findViewById(R.id.tvNameHeader);
 
+        progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
+        progressBar.setVisibility(View.INVISIBLE);
+
         adapter = new ListHabitsAdapter(getActivity());
         listView = (DragSortListView) view.findViewById(R.id.listView);
         listView.setAdapter(adapter);
@@ -107,7 +130,6 @@ public class ListHabitsFragment extends Fragment
         llEmpty = view.findViewById(R.id.llEmpty);
 
         updateEmptyMessage();
-
         setHasOptionsMenu(true);
         return view;
     }
@@ -124,7 +146,14 @@ public class ListHabitsFragment extends Fragment
     public void onResume()
     {
         super.onResume();
-        updateHeader();
+        if(lastLoadedTimestamp == null || lastLoadedTimestamp != DateHelper.getStartOfToday())
+        {
+            updateHeader();
+            fetchAllHabits();
+            updateEmptyMessage();
+        }
+
+        adapter.notifyDataSetChanged();
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
         short_toggle_enabled = prefs.getBoolean("pref_short_toggle", false);
@@ -156,6 +185,139 @@ public class ListHabitsFragment extends Fragment
         }
     }
 
+    private void fetchAllHabits()
+    {
+        if(currentFetchTask != null) currentFetchTask.cancel(true);
+
+        currentFetchTask = new AsyncTask<Void, Integer, Void>()
+        {
+            HashMap<Long, Habit> newHabits = Habit.getAll();
+            HashMap<Integer, Habit> newPositionToHabit = new HashMap<>();
+            HashMap<Long, int[]> newCheckmarks = new HashMap<>();
+            HashMap<Long, Integer> newScores = new HashMap<>();
+
+            @Override
+            protected Void doInBackground(Void... params)
+            {
+                long dateTo = DateHelper.getStartOfDay(DateHelper.getLocalTime());
+                long dateFrom = dateTo - (button_count - 1) * DateHelper.millisecondsInOneDay;
+                int[] empty = new int[button_count];
+
+                for(Habit h : newHabits.values())
+                {
+                    newScores.put(h.getId(), 0);
+                    newPositionToHabit.put(h.position, h);
+                    newCheckmarks.put(h.getId(), empty);
+                }
+
+                int current = 0;
+                for(int i = 0; i < newHabits.size(); i++)
+                {
+                    if(isCancelled()) return null;
+
+                    Habit h = newPositionToHabit.get(i);
+                    newScores.put(h.getId(), h.getScore());
+                    newCheckmarks.put(h.getId(), h.getCheckmarks(dateFrom, dateTo));
+
+                    publishProgress(current++, newHabits.size());
+                }
+
+                commit();
+
+                return null;
+            }
+
+            private void commit()
+            {
+                habits = newHabits;
+                positionToHabit = newPositionToHabit;
+                checkmarks = newCheckmarks;
+                scores = newScores;
+            }
+
+            @Override
+            protected void onPreExecute()
+            {
+                progressBar.setIndeterminate(false);
+                progressBar.setProgress(0);
+                progressBar.setVisibility(View.VISIBLE);
+            }
+
+            @Override
+            protected void onProgressUpdate(Integer... values)
+            {
+                progressBar.setMax(values[1]);
+                progressBar.setProgress(values[0]);
+
+                if(lastLoadedTimestamp == null)
+                {
+                    commit();
+                    adapter.notifyDataSetChanged();
+                }
+            }
+
+            @Override
+            protected void onPostExecute(Void aVoid)
+            {
+                if(isCancelled()) return;
+
+                adapter.notifyDataSetChanged();
+                updateEmptyMessage();
+
+                progressBar.setVisibility(View.INVISIBLE);
+                currentFetchTask = null;
+                lastLoadedTimestamp = DateHelper.getStartOfToday();
+            }
+
+        };
+
+        currentFetchTask.execute();
+    }
+
+    private void fetchHabit(final Long id)
+    {
+        new AsyncTask<Void, Void, Void>()
+        {
+            @Override
+            protected Void doInBackground(Void... params)
+            {
+                long dateTo = DateHelper.getStartOfDay(DateHelper.getLocalTime());
+                long dateFrom = dateTo - (button_count - 1) * DateHelper.millisecondsInOneDay;
+
+                Habit h = Habit.get(id);
+                habits.put(id, h);
+                scores.put(id, h.getScore());
+                checkmarks.put(id, h.getCheckmarks(dateFrom, dateTo));
+
+                return null;
+            }
+
+            @Override
+            protected void onPreExecute()
+            {
+                new Handler().postDelayed(new Runnable()
+                {
+                    @Override
+                    public void run()
+                    {
+                        if(getStatus() == Status.RUNNING)
+                        {
+                            progressBar.setIndeterminate(true);
+                            progressBar.setVisibility(View.VISIBLE);
+                        }
+                    }
+                }, 500);
+            }
+
+            @Override
+            protected void onPostExecute(Void aVoid)
+            {
+                progressBar.setVisibility(View.GONE);
+                adapter.notifyDataSetChanged();
+            }
+        }.execute();
+    }
+
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
     {
@@ -173,7 +335,7 @@ public class ListHabitsFragment extends Fragment
         getActivity().getMenuInflater().inflate(R.menu.list_habits_context, menu);
 
         AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
-        final Habit habit = Habit.get(info.id);
+        final Habit habit = habits.get(info.id);
 
         if(habit.isArchived())
             menu.findItem(R.id.action_archive_habit).setVisible(false);
@@ -197,7 +359,7 @@ public class ListHabitsFragment extends Fragment
             case R.id.action_show_archived:
             {
                 Habit.setIncludeArchived(!Habit.isIncludeArchived());
-                notifyDataSetChanged();
+                fetchAllHabits();
                 activity.invalidateOptionsMenu();
                 return true;
             }
@@ -212,7 +374,7 @@ public class ListHabitsFragment extends Fragment
     {
         AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuItem.getMenuInfo();
         final int id = menuItem.getItemId();
-        final Habit habit = Habit.get(info.id);
+        final Habit habit = habits.get(info.id);
 
         if (id == R.id.action_edit_habit)
         {
@@ -224,12 +386,12 @@ public class ListHabitsFragment extends Fragment
         else if (id == R.id.action_archive_habit)
         {
             Command c = habit.new ArchiveCommand();
-            executeCommand(c);
+            executeCommand(c, null);
         }
         else if (id == R.id.action_unarchive_habit)
         {
             Command c = habit.new UnarchiveCommand();
-            executeCommand(c);
+            executeCommand(c, null);
         }
 
         return super.onContextItemSelected(menuItem);
@@ -240,26 +402,28 @@ public class ListHabitsFragment extends Fragment
     {
         if (new Date().getTime() - lastLongClick < 1000) return;
 
-        Habit habit = Habit.getByPosition(position);
+        Habit habit = positionToHabit.get(position);
         habitClickListener.onHabitClicked(habit);
     }
 
     @Override
-    public void onSaved(Command command)
+    public void onSaved(Command command, Object savedObject)
     {
-        executeCommand(command);
-        ReminderHelper.createReminderAlarms(activity);
-    }
+        Habit h = (Habit) savedObject;
 
-    public void notifyDataSetChanged()
-    {
-        updateEmptyMessage();
+        if(h == null) activity.executeCommand(command, null);
+        else activity.executeCommand(command, h.getId());
         adapter.notifyDataSetChanged();
+
+        ReminderHelper.createReminderAlarms(activity);
     }
 
     private void updateEmptyMessage()
     {
-        llEmpty.setVisibility(Habit.getCount() > 0 ? View.GONE : View.VISIBLE);
+        if(lastLoadedTimestamp == null)
+            llEmpty.setVisibility(View.GONE);
+        else
+            llEmpty.setVisibility(habits.size() > 0 ? View.GONE : View.VISIBLE);
     }
 
     @Override
@@ -286,24 +450,35 @@ public class ListHabitsFragment extends Fragment
 
     private void toggleCheck(View v)
     {
-        Habit habit = Habit.get((Long) v.getTag(R.string.habit_key));
+        Habit habit = habits.get((Long) v.getTag(R.string.habit_key));
+
         int offset = (Integer) v.getTag(R.string.offset_key);
         long timestamp = DateHelper.getStartOfDay(
                 DateHelper.getLocalTime() - offset * DateHelper.millisecondsInOneDay);
 
-        executeCommand(habit.new ToggleRepetitionCommand(timestamp));
+        if(v.getTag(R.string.toggle_key).equals(2))
+            updateCheck(habit.color, (TextView) v, 0);
+        else
+            updateCheck(habit.color, (TextView) v, 2);
+
+        executeCommand(habit.new ToggleRepetitionCommand(timestamp), habit.getId());
     }
 
-    private void executeCommand(Command c)
+    private void executeCommand(Command c, Long refreshKey)
     {
-        activity.executeCommand(c);
+        activity.executeCommand(c, refreshKey);
     }
 
     @Override
     public void drop(int from, int to)
     {
+        Habit fromHabit = positionToHabit.get(from);
+        Habit toHabit = positionToHabit.get(to);
+        positionToHabit.put(to, fromHabit);
+        positionToHabit.put(from, toHabit);
+        adapter.notifyDataSetChanged();
+
         Habit.reorder(from, to);
-        notifyDataSetChanged();
     }
 
     @Override
@@ -337,13 +512,13 @@ public class ListHabitsFragment extends Fragment
         @Override
         public int getCount()
         {
-            return Habit.getCount();
+            return habits.size();
         }
 
         @Override
         public Object getItem(int position)
         {
-            return Habit.getByPosition(position);
+            return positionToHabit.get(position);
         }
 
         @Override
@@ -355,7 +530,7 @@ public class ListHabitsFragment extends Fragment
         @Override
         public View getView(int position, View view, ViewGroup parent)
         {
-            final Habit habit = (Habit) getItem(position);
+            final Habit habit = positionToHabit.get(position);
 
             if (view == null || (Long) view.getTag(R.id.KEY_TIMESTAMP) !=
                     DateHelper.getStartOfToday())
@@ -397,7 +572,6 @@ public class ListHabitsFragment extends Fragment
             LinearLayout llInner = (LinearLayout) view.findViewById(R.id.llInner);
             llInner.setTag(R.string.habit_key, habit.getId());
 
-            int inactiveColor = Color.rgb(230, 230, 230);
             int activeColor = habit.color;
 
             tvName.setText(habit.name);
@@ -413,17 +587,17 @@ public class ListHabitsFragment extends Fragment
             }
             else
             {
-                int score = habit.getScore();
+                int score = scores.get(habit.getId());
 
                 if (score < Habit.HALF_STAR_CUTOFF)
                 {
                     tvStar.setText(context.getString(R.string.fa_star_o));
-                    tvStar.setTextColor(inactiveColor);
+                    tvStar.setTextColor(INACTIVE_COLOR);
                 }
                 else if (score < Habit.FULL_STAR_CUTOFF)
                 {
                     tvStar.setText(context.getString(R.string.fa_star_half_o));
-                    tvStar.setTextColor(inactiveColor);
+                    tvStar.setTextColor(INACTIVE_COLOR);
                 }
                 else
                 {
@@ -432,14 +606,10 @@ public class ListHabitsFragment extends Fragment
                 }
             }
 
-
             LinearLayout llButtons = (LinearLayout) view.findViewById(R.id.llButtons);
             int m = llButtons.getChildCount();
 
-            long dateTo = DateHelper.getStartOfDay(DateHelper.getLocalTime());
-            long dateFrom = dateTo - m * DateHelper.millisecondsInOneDay;
-
-            int isChecked[] = habit.getReps(dateFrom, dateTo);
+            int isChecked[] = checkmarks.get(habit.getId());
 
             for (int i = 0; i < m; i++)
             {
@@ -447,28 +617,40 @@ public class ListHabitsFragment extends Fragment
                 TextView tvCheck = (TextView) llButtons.getChildAt(i);
                 tvCheck.setTag(R.string.habit_key, habit.getId());
                 tvCheck.setTag(R.string.offset_key, i);
-
-                switch (isChecked[i])
-                {
-                    case 2:
-                        tvCheck.setText(R.string.fa_check);
-                        tvCheck.setTextColor(activeColor);
-                        break;
-
-                    case 1:
-                        tvCheck.setText(R.string.fa_check);
-                        tvCheck.setTextColor(inactiveColor);
-                        break;
-
-                    case 0:
-                        tvCheck.setText(R.string.fa_times);
-                        tvCheck.setTextColor(inactiveColor);
-                        break;
-                }
+                updateCheck(activeColor, tvCheck, isChecked[i]);
             }
 
             return view;
         }
+    }
 
+    private void updateCheck(int activeColor, TextView tvCheck, int check)
+    {
+        switch (check)
+        {
+            case 2:
+                tvCheck.setText(R.string.fa_check);
+                tvCheck.setTextColor(activeColor);
+                tvCheck.setTag(R.string.toggle_key, 2);
+                break;
+
+            case 1:
+                tvCheck.setText(R.string.fa_check);
+                tvCheck.setTextColor(INACTIVE_COLOR);
+                tvCheck.setTag(R.string.toggle_key, 1);
+                break;
+
+            case 0:
+                tvCheck.setText(R.string.fa_times);
+                tvCheck.setTextColor(INACTIVE_COLOR);
+                tvCheck.setTag(R.string.toggle_key, 0);
+                break;
+        }
+    }
+
+    public void onPostExecuteCommand(Long refreshKey)
+    {
+        if(refreshKey == null) fetchAllHabits();
+        else fetchHabit(refreshKey);
     }
 }

app/src/main/java/org/isoron/uhabits/dialogs/ShowHabitFragment.java

@@ -46,6 +46,8 @@ public class ShowHabitFragment extends Fragment implements DialogHelper.OnSavedL
         activity = (ShowHabitActivity) getActivity();
         habit = activity.habit;
 
+        habit.updateCheckmarks();
+
         if (android.os.Build.VERSION.SDK_INT >= 21)
         {
             int darkerHabitColor = ColorHelper.mixColors(habit.color, Color.BLACK, 0.75f);
@@ -108,9 +110,13 @@ public class ShowHabitFragment extends Fragment implements DialogHelper.OnSavedL
     }
 
     @Override
-    public void onSaved(Command command)
+    public void onSaved(Command command, Object savedObject)
     {
-        activity.executeCommand(command);
+        Habit h = (Habit) savedObject;
+
+        if(h == null) activity.executeCommand(command, null);
+        else activity.executeCommand(command, h.getId());
+
         ReminderHelper.createReminderAlarms(activity);
         activity.recreate();
     }

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

@@ -0,0 +1,29 @@
+package org.isoron.uhabits.models;
+
+import com.activeandroid.Model;
+import com.activeandroid.annotation.Column;
+import com.activeandroid.annotation.Table;
+
+@Table(name = "Checkmarks")
+public class Checkmark extends Model
+{
+
+    public static final int UNCHECKED = 0;
+    public static final int CHECKED_IMPLICITLY = 1;
+    public static final int CHECKED_EXPLICITLY = 2;
+
+    @Column(name = "habit")
+    public Habit habit;
+
+    @Column(name = "timestamp")
+    public Long timestamp;
+
+    /**
+     * Indicates whether there is a checkmark at the given timestamp or not, and whether the
+     * checkmark is explicit or implicit. An explicit checkmark indicates that there is a
+     * repetition at that day. An implicit checkmark indicates that there is no repetition at that
+     * day, but a repetition was not needed, due to the frequency of the habit.
+     */
+    @Column(name = "value")
+    public Integer value;
+}

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

@@ -3,9 +3,8 @@ package org.isoron.uhabits.models;
 import android.annotation.SuppressLint;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
-import android.os.AsyncTask;
-import android.util.Log;
 
+import com.activeandroid.ActiveAndroid;
 import com.activeandroid.Cache;
 import com.activeandroid.Model;
 import com.activeandroid.annotation.Column;
@@ -21,6 +20,8 @@ import org.isoron.helpers.Command;
 import org.isoron.helpers.DateHelper;
 import org.isoron.uhabits.R;
 
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 
 @Table(name = "Habits")
@@ -83,6 +84,19 @@ public class Habit extends Model
         return Habit.load(Habit.class, id);
     }
 
+    public static HashMap<Long, Habit> getAll()
+    {
+        List<Habit> habits = select().execute();
+        HashMap<Long, Habit> map = new HashMap<>();
+
+        for(Habit h : habits)
+        {
+            map.put(h.getId(), h);
+        }
+
+        return map;
+    }
+
     @SuppressLint("DefaultLocale")
     public static void updateId(long oldId, long newId)
     {
@@ -150,15 +164,25 @@ public class Habit extends Model
 
     public static void rebuildOrder()
     {
-        Log.d("X", "rebuilding order");
-
         List<Habit> habits = select().execute();
-        int i = 0;
-        for (Habit h : habits)
+
+        ActiveAndroid.beginTransaction();
+        try
         {
-            h.position = i++;
-            h.save();
+            int i = 0;
+            for (Habit h : habits)
+            {
+                h.position = i++;
+                h.save();
+            }
+
+            ActiveAndroid.setTransactionSuccessful();
         }
+        finally
+        {
+            ActiveAndroid.endTransaction();
+        }
+
     }
 
     public static void roundTimestamps()
@@ -235,39 +259,127 @@ public class Habit extends Model
                 .and("timestamp = ?", timestamp).execute();
     }
 
-    public int[] getReps(long timeFrom, long timeTo)
+    public void deleteCheckmarksNewerThan(long timestamp)
+    {
+        new Delete().from(Checkmark.class)
+                .where("habit = ?", getId())
+                .and("timestamp >= ?", timestamp)
+                .execute();
+    }
+
+    public void deleteStreaksNewerThan(long timestamp)
+    {
+        new Delete().from(Streak.class)
+                .where("habit = ?", getId())
+                .and("end >= ?", timestamp - DateHelper.millisecondsInOneDay)
+                .execute();
+    }
+
+    public int[] getCheckmarks(Long fromTimestamp, Long toTimestamp)
+    {
+        updateCheckmarks();
+
+        String query = "select value, timestamp from Checkmarks where " +
+                "habit = ? and timestamp >= ? and timestamp <= ?";
+
+        SQLiteDatabase db = Cache.openDatabase();
+        String args[] = {getId().toString(), fromTimestamp.toString(), toTimestamp.toString()};
+        Cursor cursor = db.rawQuery(query, args);
+
+        long day = DateHelper.millisecondsInOneDay;
+        int nDays = (int) ((toTimestamp - fromTimestamp) / day) + 1;
+        int[] checks = new int[nDays];
+
+        if(cursor.moveToFirst())
+        {
+            do
+            {
+                long timestamp = cursor.getLong(1);
+                int offset = (int) ((timestamp - fromTimestamp) / day);
+                checks[nDays - offset - 1] = cursor.getInt(0);
+
+            } while (cursor.moveToNext());
+        }
+
+        return checks;
+    }
+
+    public void updateCheckmarks()
     {
-        long timeFromExtended = timeFrom - (long) (freq_den) * DateHelper.millisecondsInOneDay;
-        List<Repetition> reps = selectRepsFromTo(timeFromExtended, timeTo).execute();
+        long beginning;
+        long today = DateHelper.getStartOfToday();
+        long day = DateHelper.millisecondsInOneDay;
 
-        int nDaysExtended = (int) ((timeTo - timeFromExtended) / DateHelper.millisecondsInOneDay);
-        int checkExtended[] = new int[nDaysExtended + 1];
+        Checkmark newestCheckmark = getNewestCheckmark();
+        if(newestCheckmark == null)
+        {
+            Repetition oldestRep = getOldestRep();
+            if (oldestRep == null) return;
 
-        int nDays = (int) ((timeTo - timeFrom) / DateHelper.millisecondsInOneDay);
+            beginning = oldestRep.timestamp;
+        }
+        else
+        {
+            beginning = newestCheckmark.timestamp + day;
+        }
 
-        // mark explicit checks
+        if(beginning > today)
+            return;
+
+        long beginningExtended = beginning - (long) (freq_den) * day;
+        List<Repetition> reps = selectRepsFromTo(beginningExtended, today).execute();
+
+        int nDays = (int) ((today - beginning) / day) + 1;
+        int nDaysExtended = (int) ((today - beginningExtended) / day) + 1;
+
+        int checks[] = new int[nDaysExtended];
+
+        // explicit checks
         for (Repetition rep : reps)
         {
-            int offset = (int) ((rep.timestamp - timeFrom) / DateHelper.millisecondsInOneDay);
-            checkExtended[nDays - offset] = 2;
+            int offset = (int) ((rep.timestamp - beginningExtended) / day);
+            checks[nDaysExtended - offset - 1] = 2;
         }
 
-        // marks implicit checks
+        // implicit checks
         for (int i = 0; i < nDays; i++)
         {
             int counter = 0;
 
             for (int j = 0; j < freq_den; j++)
-                if (checkExtended[i + j] == 2) counter++;
+                if (checks[i + j] == 2) counter++;
 
-            if (counter >= freq_num) checkExtended[i] = Math.max(checkExtended[i], 1);
+            if (counter >= freq_num) checks[i] = Math.max(checks[i], 1);
         }
 
-        int check[] = new int[nDays + 1];
-        for (int i = 0; i < nDays + 1; i++)
-            check[i] = checkExtended[i];
+        ActiveAndroid.beginTransaction();
+
+        try
+        {
+            for (int i = 0; i < nDays; i++)
+            {
+                Checkmark c = new Checkmark();
+                c.habit = this;
+                c.timestamp = today - i * day;
+                c.value = checks[i];
+                c.save();
+            }
+
+            ActiveAndroid.setTransactionSuccessful();
+        }
+        finally
+        {
+            ActiveAndroid.endTransaction();
+        }
+    }
 
-        return check;
+    public Checkmark getNewestCheckmark()
+    {
+        return new Select().from(Checkmark.class)
+                .where("habit = ?", getId())
+                .orderBy("timestamp desc")
+                .limit(1)
+                .executeSingle();
     }
 
     public int getRepsCount(int days)
@@ -280,7 +392,7 @@ public class Habit extends Model
     public boolean hasImplicitRepToday()
     {
         long today = DateHelper.getStartOfToday();
-        int reps[] = getReps(today - DateHelper.millisecondsInOneDay, today);
+        int reps[] = getCheckmarks(today - DateHelper.millisecondsInOneDay, today);
         return (reps[0] > 0);
     }
 
@@ -289,12 +401,21 @@ public class Habit extends Model
         return (Repetition) selectReps().limit(1).executeSingle();
     }
 
+    public Repetition getOldestRepNewerThan(long timestamp)
+    {
+        return selectReps()
+                .where("timestamp > ?", timestamp)
+                .limit(1)
+                .executeSingle();
+    }
+
     public void toggleRepetition(long timestamp)
     {
         if (hasRep(timestamp))
         {
             deleteReps(timestamp);
-        } else
+        }
+        else
         {
             Repetition rep = new Repetition();
             rep.habit = this;
@@ -303,6 +424,8 @@ public class Habit extends Model
         }
 
         deleteScoresNewerThan(timestamp);
+        deleteCheckmarksNewerThan(timestamp);
+        deleteStreaksNewerThan(timestamp);
     }
 
     public void archive()
@@ -311,7 +434,7 @@ public class Habit extends Model
         position = 9999;
         save();
 
-        if(!isIncludeArchived()) Habit.rebuildOrder();
+        Habit.rebuildOrder();
     }
 
     public void unarchive()
@@ -360,7 +483,8 @@ public class Habit extends Model
             if (oldestRep == null) return 0;
             beginningTime = oldestRep.timestamp;
             beginningScore = 0;
-        } else
+        }
+        else
         {
             beginningTime = newestScore.timestamp + day;
             beginningScore = newestScore.score;
@@ -369,23 +493,34 @@ public class Habit extends Model
         long nDays = (today - beginningTime) / day;
         if (nDays < 0) return newestScore.score;
 
-        int reps[] = getReps(beginningTime, today);
+        int reps[] = getCheckmarks(beginningTime, today);
 
+        ActiveAndroid.beginTransaction();
         int lastScore = beginningScore;
-        for (int i = 0; i < reps.length; i++)
+
+        try
         {
-            Score s = new Score();
-            s.habit = this;
-            s.timestamp = beginningTime + day * i;
-            s.score = (int) (lastScore * multiplier);
-            if (reps[reps.length - i - 1] == 2)
+            for (int i = 0; i < reps.length; i++)
             {
-                s.score += 1000000;
-                s.score = Math.min(s.score, 19259500);
+                Score s = new Score();
+                s.habit = this;
+                s.timestamp = beginningTime + day * i;
+                s.score = (int) (lastScore * multiplier);
+                if (reps[reps.length - i - 1] == 2)
+                {
+                    s.score += 1000000;
+                    s.score = Math.min(s.score, 19259500);
+                }
+                s.save();
+
+                lastScore = s.score;
             }
-            s.save();
 
-            lastScore = s.score;
+            ActiveAndroid.setTransactionSuccessful();
+        }
+        finally
+        {
+            ActiveAndroid.endTransaction();
         }
 
         return lastScore;
@@ -403,41 +538,89 @@ public class Habit extends Model
                 offset, divisor).execute();
     }
 
-    public long[] getStreaks()
+    public List<Streak> getStreaks()
     {
-        String query =
-                "create temporary table T as select distinct r1.habit as habit, r1.timestamp as time,\n" +
-                        "    (select count(*) from repetitions r2 where r1.habit = r2.habit and\n" +
-                        "        (r1.timestamp = r2.timestamp - 24*60*60*1000 or\n" +
-                        "        r1.timestamp = r2.timestamp + 24*60*60*1000)) as neighbors\n" +
-                        "from repetitions r1 where r1.habit = ?";
+        updateStreaks();
 
-        String query2 =
-                "select time from T, (select 0 union select 1) where neighbors = 0 union all\n" +
-                        "select time from T where neighbors = 1 order by time;";
+        return new Select()
+                .from(Streak.class)
+                .where("habit = ?", getId())
+                .orderBy("end asc")
+                .execute();
+    }
 
-        String args[] = {getId().toString()};
+    public Streak getNewestStreak()
+    {
+        return new Select()
+                .from(Streak.class)
+                .where("habit = ?", getId())
+                .orderBy("end desc")
+                .limit(1)
+                .executeSingle();
+    }
 
-        SQLiteDatabase db = Cache.openDatabase();
-        db.beginTransaction();
-        db.execSQL(query, args);
-        Cursor cursor = db.rawQuery(query2, null);
+    public void updateStreaks()
+    {
+        long beginning;
+        long today = DateHelper.getStartOfToday();
+        long day = DateHelper.millisecondsInOneDay;
+
+        Streak newestStreak = getNewestStreak();
+        if(newestStreak == null)
+        {
+            Repetition oldestRep = getOldestRep();
+            if (oldestRep == null) return;
+
+            beginning = oldestRep.timestamp;
+        }
+        else
+        {
+            Repetition oldestRep = getOldestRepNewerThan(newestStreak.end);
+            if (oldestRep == null) return;
+
+            beginning = oldestRep.timestamp;
+        }
+
+        if(beginning > today) return;
 
-        long streaks[] = new long[cursor.getCount()];
-        int current = 0;
+        int checks[] = getCheckmarks(beginning, today);
+        ArrayList<Long> list = new ArrayList<>();
 
-        Log.d("Streaks", String.format("%d rows", cursor.getCount()));
+        long current = beginning;
+        list.add(current);
 
-        if (cursor.moveToFirst())
+        for(int i = 1; i < checks.length; i++)
         {
-            do
-            {
-                streaks[current++] = cursor.getLong(0);
-            } while (cursor.moveToNext());
+            current += day;
+            int j = checks.length - i - 1;
+
+            if((checks[j + 1] == 0 && checks[j] > 0)) list.add(current);
+            if((checks[j + 1] > 0 && checks[j] == 0)) list.add(current - day);
         }
 
-        db.endTransaction();
-        return streaks;
+        if(list.size() % 2 == 1)
+            list.add(current);
+
+        ActiveAndroid.beginTransaction();
+
+        try
+        {
+            for (int i = 0; i < list.size(); i += 2)
+            {
+                Streak streak = new Streak();
+                streak.habit = this;
+                streak.start = list.get(i);
+                streak.end = list.get(i + 1);
+                streak.length = (streak.end - streak.start) / day + 1;
+                streak.save();
+            }
+
+            ActiveAndroid.setTransactionSuccessful();
+        }
+        finally
+        {
+            ActiveAndroid.endTransaction();
+        }
     }
 
     public static class CreateCommand extends Command
@@ -508,28 +691,9 @@ public class Habit extends Model
             habit.save();
             if (hasIntervalChanged)
             {
-                new AsyncTask<Habit, Integer, Integer>()
-                {
-                    @Override
-                    protected Integer doInBackground(Habit... habits)
-                    {
-                        // HACK: We wait one second before deleting old score, otherwise the view will
-                        // trigger the very slow getScore on the main thread at the same time, or even
-                        // before us.
-                        try
-                        {
-                            Thread.sleep(1000);
-                        } catch (InterruptedException e)
-                        {
-                            e.printStackTrace();
-                        }
-
-                        habits[0].deleteScoresNewerThan(0);
-                        habits[0].getScore();
-
-                        return 0;
-                    }
-                }.execute(habit);
+                habit.deleteCheckmarksNewerThan(0);
+                habit.deleteStreaksNewerThan(0);
+                habit.deleteScoresNewerThan(0);
             }
         }
 
@@ -540,26 +704,9 @@ public class Habit extends Model
             habit.save();
             if (hasIntervalChanged)
             {
-                new AsyncTask<Habit, Integer, Integer>()
-                {
-                    @Override
-                    protected Integer doInBackground(Habit... habits)
-                    {
-                        try
-                        {
-                            Thread.sleep(1000);
-                        } catch (InterruptedException e)
-                        {
-                            e.printStackTrace();
-                        }
-
-                        habits[0].deleteScoresNewerThan(0);
-                        habits[0].getScore();
-
-                        return 0;
-                    }
-                }.execute(habit);
-
+                habit.deleteCheckmarksNewerThan(0);
+                habit.deleteStreaksNewerThan(0);
+                habit.deleteScoresNewerThan(0);
             }
         }
 

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

@@ -0,0 +1,19 @@
+package org.isoron.uhabits.models;
+
+import com.activeandroid.Model;
+import com.activeandroid.annotation.Column;
+
+public class Streak extends Model
+{
+    @Column(name = "habit")
+    public Habit habit;
+
+    @Column(name = "start")
+    public Long start;
+
+    @Column(name = "end")
+    public Long end;
+
+    @Column(name = "length")
+    public Long length;
+}

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

@@ -13,17 +13,19 @@ import android.view.View;
 import org.isoron.helpers.ColorHelper;
 import org.isoron.helpers.DateHelper;
 import org.isoron.uhabits.R;
+import org.isoron.uhabits.models.Checkmark;
 import org.isoron.uhabits.models.Habit;
 
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.GregorianCalendar;
+import java.util.List;
 
 public class HabitHistoryView extends View
 {
 
     private Habit habit;
-    private int reps[];
+    private int[] checks;
 
     private Context context;
     private Paint pSquareBg, pSquareFg, pTextHeader;
@@ -93,7 +95,7 @@ public class HabitHistoryView extends View
         for (int i = 0; i < nColumns * 7; i++)
             dateFrom -= DateHelper.millisecondsInOneDay;
 
-        reps = habit.getReps(dateFrom, dateTo);
+        checks = habit.getCheckmarks(dateFrom, dateTo);
     }
 
     @Override
@@ -159,7 +161,9 @@ public class HabitHistoryView extends View
             {
                 if (!(i == nColumns - 1 && offsetWeeks == 0 && j > todayWeekday))
                 {
-                    pSquareBg.setColor(colors[reps[k]]);
+                    if(k >= checks.length) pSquareBg.setColor(colors[0]);
+                    else pSquareBg.setColor(colors[checks[k]]);
+
                     canvas.drawRect(square, pSquareBg);
                     canvas.drawText(Integer.toString(currentDate.get(Calendar.DAY_OF_MONTH)),
                             square.centerX(), square.centerY() + squareTextOffset, pSquareFg);

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

@@ -12,10 +12,10 @@ import android.view.View;
 import org.isoron.helpers.ColorHelper;
 import org.isoron.helpers.DateHelper;
 import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.models.Streak;
 
 import java.text.SimpleDateFormat;
-import java.util.Calendar;
-import java.util.GregorianCalendar;
+import java.util.List;
 
 public class HabitStreakView extends View
 {
@@ -23,10 +23,9 @@ public class HabitStreakView extends View
     private int columnWidth, columnHeight, nColumns;
 
     private Paint pText, pBar;
-    private long streaks[];
+    private List<Streak> streaks;
     private int dataOffset;
 
-    private long streakStart[], streakEnd[], streakLength[];
     private long maxStreakLength;
 
     private int barHeaderHeight;
@@ -68,17 +67,9 @@ public class HabitStreakView extends View
     private void fetchStreaks()
     {
         streaks = habit.getStreaks();
-        streakStart = new long[streaks.length / 2];
-        streakEnd = new long[streaks.length / 2];
-        streakLength = new long[streaks.length / 2];
 
-        for(int i=0; i<streaks.length / 2; i++)
-        {
-            streakStart[i] = streaks[i * 2];
-            streakEnd[i] = streaks[i * 2 + 1];
-            streakLength[i] = (streakEnd[i] - streakStart[i]) / DateHelper.millisecondsInOneDay + 1;
-            maxStreakLength = Math.max(maxStreakLength, streakLength[i]);
-        }
+        for(Streak s : streaks)
+            maxStreakLength = Math.max(maxStreakLength, s.length);
     }
 
     @Override
@@ -103,16 +94,17 @@ public class HabitStreakView extends View
         float lineHeight = pText.getFontSpacing();
         float barHeaderOffset = lineHeight * 0.4f;
 
-        int start = Math.max(0, streakStart.length - nColumns - dataOffset);
+        int nStreaks = streaks.size();
+        int start = Math.max(0, nStreaks - nColumns - dataOffset);
         SimpleDateFormat dfMonth = new SimpleDateFormat("MMM");
 
         String previousMonth = "";
 
-        for (int offset = 0; offset < nColumns && start+offset < streakStart.length; offset++)
+        for (int offset = 0; offset < nColumns && start+offset < nStreaks; offset++)
         {
-            String month = dfMonth.format(streakStart[start+offset]);
+            String month = dfMonth.format(streaks.get(start+offset).start);
 
-            long l = streakLength[offset+start];
+            long l = streaks.get(offset+start).length;
             double lRelative = ((double) l) / maxStreakLength;
 
             pBar.setColor(colors[(int) Math.floor(lRelative*3)]);
@@ -122,7 +114,7 @@ public class HabitStreakView extends View
             r.offset(offset * columnWidth, barHeaderHeight + columnHeight - height);
 
             canvas.drawRect(r, pBar);
-            canvas.drawText(Long.toString(streakLength[offset+start]), r.centerX(), r.top - barHeaderOffset, pBar);
+            canvas.drawText(Long.toString(l), r.centerX(), r.top - barHeaderOffset, pBar);
 
             if(!month.equals(previousMonth))
                 canvas.drawText(month, r.centerX(), r.bottom + lineHeight * 1.2f, pText);
@@ -166,7 +158,7 @@ public class HabitStreakView extends View
     private boolean move(float dx)
     {
         int newDataOffset = dataOffset + (int) (dx / columnWidth);
-        newDataOffset = Math.max(0, Math.min(streakStart.length - nColumns, newDataOffset));
+        newDataOffset = Math.max(0, Math.min(streaks.size() - nColumns, newDataOffset));
 
         if (newDataOffset != dataOffset)
         {

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

@@ -1,4 +1,4 @@
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/container"
     android:layout_width="match_parent"
@@ -13,4 +13,4 @@
         android:layout_height="match_parent"
         tools:layout="@layout/list_habits_fragment" />
 
-</FrameLayout>
+</RelativeLayout>

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

@@ -52,4 +52,12 @@
             style="@style/habitsListButtonsPanelStyle"/>
     </LinearLayout>
 
+    <ProgressBar
+        android:id="@+id/progressBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        style="?android:attr/progressBarStyleHorizontal"
+        android:layout_marginTop="37dp"
+        />
+
 </RelativeLayout>

app/src/main/res/values/strings.xml

@@ -41,6 +41,7 @@
     <string name="day_of_week_label_typeface">sans-serif</string>
     <string name="habit_key"></string>
     <string name="offset_key"></string>
+    <string name="toggle_key"></string>
 
     <item name="KEY_TIMESTAMP" type="id"/>
 

app/src/main/res/xml/preferences.xml

@@ -43,14 +43,9 @@
                 android:action="android.intent.action.VIEW"
                 android:data="https://github.com/iSoron/uhabits"/>
         </Preference>
-    </PreferenceCategory>
-
-    <PreferenceCategory
-        android:key="pref_key_misc"
-        android:title="Miscellaneous">
 
 
-        <Preference android:title="Replay app introduction">
+        <Preference android:title="View app introduction">
             <intent
                 android:targetClass="org.isoron.uhabits.IntroActivity"
                 android:targetPackage="org.isoron.uhabits"/>