Widget frozen after HomeScreen restart

Question

I've created widget which can be multiple instantiated with different settings stored in SharedPreferences. After solving initial problem with non-updating widgets directly after Configuration Activity (Multiple, configurable widgets - update issue ) everything seems to be working fine. But. When Home Screen application is killed/rebooted (Trebuchet in my case, Android 4.3 & 4.2.2) widget is not refreshed and onClick listeners are gone (onUpdate action is not triggered). I see only non-responsive, empty WigdetView with default, non-updated layout from xml. What is more weird - after phone reboot or after add another instance of my widget - everything works fine again.

I've tried many different ways to solve this strange issue (like single reference to RemoteViews, use Service instead of AsyncTask etc) - but none of this ideas solved the problem..

There are a lot of important logic in code, shortcut:

AppWidgetProvider:

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {  
// ASYNCTASK WAY    
    new DownloadTask(context, appWidgetManager).execute("http://sampleurl/");
/*      
// OR SERVICE WAY   
// SERVICE LOGIC IS ALMOST THE SAME AS IN DownloadTask              
    ComponentName thisWidget = new ComponentName(context, MyWidget.class);
    int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
    Intent intent = new Intent(context.getApplicationContext(), UpdateWidgetService.class);
    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, allWidgetIds);
    context.startService(intent);
*/      
}

@Override
public void onReceive(Context context, Intent intent){
    Bundle extras = intent.getExtras();

    int mAppWidgetId=0;;

    if (extras != null) {
        mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
    }

    String action = intent.getAction();
    if (action.equals("PreferencesUpdated")) {
        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_lay);
        views.setViewVisibility(R.id.menuLayout, View.GONE);
        appWidgetManager.updateAppWidget(mAppWidgetId, views);
        int[] appWidgetIds = new int[] {mAppWidgetId};
        onUpdate(context, appWidgetManager, appWidgetIds);
    }
    else if (action.equals("ShowMenu")) {
        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_lay);
        views.setViewVisibility(R.id.menuLayout, View.VISIBLE);
        appWidgetManager.updateAppWidget(mAppWidgetId, views);
    }   
    super.onReceive(context, intent);
}

DownloadTask

public DownloadTask(Context context, AppWidgetManager appWidgetManager) {
    this.context = context;
    this.appWidgetManager = appWidgetManager;
}

@Override
protected String doInBackground(String... url) {
    // 1. DOWNLOAD FILE
    // 2. PROCESS FILE, ADD TO DATABASE, ETC

    // 3. UPDATE ALL WIDGETS
        ComponentName thisWidget = new ComponentName(context, MyWidget.class);
        int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
        for (int widgetId : allWidgetIds) {
            SharedPreferences settings = context.getSharedPreferences(PREFS_NAME, 0);
            int myPref= settings.getInt("myPref"+widgetId, -1);
            if(myPref!= -1){
                Log.d("DownloadTask", "widget id:"+widgetId);
                updateWidget(db, widgetId, selectedStation);
            }
        }
        db.close();

    return null;
}

@Override
protected void onPreExecute() {
  super.onPreExecute();

  //SHOW PROGRESSBAR (LOADER) ON ALL WIDGETS
  //ADD onClicks
  ComponentName thisWidget = new ComponentName(context, MyWidget.class);
  RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_lay);
  int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
  for (int widgetId : allWidgetIds) {
      views.setViewVisibility(R.id.progressLayout, View.VISIBLE);
      views.setOnClickPendingIntent(R.id.linearLayout1, getMenuPendingIntent(context, widgetId));
      views.setOnClickPendingIntent(R.id.refreshButton, getRefreshPendingIntent(context, widgetId));
      views.setOnClickPendingIntent(R.id.settingsButton, getSettingsPendingIntent(context, widgetId));
      appWidgetManager.updateAppWidget(widgetId, views);
  }
}

@Override
protected void onPostExecute(String result) {
   super.onPostExecute(result);

   //HIDE PROGRESSBAR (LOADER) ON ALL WIDGETS
   ComponentName thisWidget = new ComponentName(context, MyWidget.class);
   RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_lay);
   views.setViewVisibility(R.id.progressLayout, View.INVISIBLE);
   appWidgetManager.updateAppWidget(thisWidget, views);

   if (exception){
       Toast.makeText(context, context.getString(R.string.net_exc), Toast.LENGTH_LONG).show();
   }
}


public void updateWidget(MySQLiteHelper db, int widgetId, int myPref){
    // UPDATE SINGLE WIDGET
    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_lay);
    views.setTextViewText(R.id.someText, "someText");
    // ETC
    appWidgetManager.updateAppWidget(widgetId, views);
}

I really hope that you guys can help me, cause I'm stuck.

ps. This is expected behaviour that all widgets are refreshed together.

Answer 1

After having had a similar problem, my widget not working after restart of the launcher/homescreen, here a possible solution:

• Whenever accessing your RemoteViews, set the .setOnClickPendingIntent(...) again.

So basically speaking, in your onReceive() where you modify your RemoteViews add the corresponding lines to add the PendingIntents, too, and everywhere else where you might modify those.

PS:
You can drop your for loop iterating over ALL widgetIds and just use

void AppWidgetManager.updateAppWidget(ComponentName provider, RemoteViews views)

to update all your views at once.