Update main activity on notification/widget click

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;
@@ -103,6 +104,10 @@ public class HabitBroadcastReceiver extends BroadcastReceiver
         habit.save();
         dismissNotification(context, habit);
 
+        LocalBroadcastManager manager = LocalBroadcastManager.getInstance(context);
+        Intent refreshIntent = new Intent(MainActivity.ACTION_REFRESH);
+        manager.sendBroadcast(refreshIntent);
+
         MainActivity.updateWidgets(context);
     }
 

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

@@ -17,13 +17,16 @@
 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;
 
@@ -38,7 +41,11 @@ 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)
@@ -50,6 +57,10 @@ 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();
     }
 
@@ -125,4 +136,20 @@ public class MainActivity extends ReplayableActivity
         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);
+        }
+    }
 }