Question

colleagues! My problem is: I`ve got an App Widget with Configuration Activity(min SDK – 2.1),
it works properly but sometimes it begins working more slowly. I logged and found out that before
updating my App Widget method onUpdate received an array of App Widget Ids

  @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        Log.d("onUpdate", Arrays.toString(appWidgetIds));

But the truth was that I had only two instances of App Widget on Home Screen but the lenth of array
is more then 2 (two): 4, sometimes 5 or 6. How can it be so? The reason of slowness of my AppWidget Updates
is that I have to call onUpdate-method for all ids but some ids (as one said “phantom widgets”) are not
real and correct.

Maybe, someone have encountered with such problem and would help me to figure out how to handle only real
app widget ids.

P.S. Uninstalling and then reinstalling app widget (and after that all the ghost widgets were gone) – are not
the proper solving of my problem. I`d like to controll ghost and real widget programmatically.

Has someone any idea how to fix this bug?

Answer 1

This code will delete the widgets (all, even the ones on screen), so is not the ideal solution

ComponentName cn = new ComponentName(getApplicationContext(), YourWidget.class);
AppWidgetManager appWidgetManager =  AppWidgetManager.getInstance(getApplicationContext());
int[] appWidgetIds1 = appWidgetManager.getAppWidgetIds(cn);
AppWidgetHost host = new AppWidgetHost(getApplicationContext(), 0);
for (int appWidgetId : appWidgetIds1) {
    host.deleteAppWidgetId(appWidgetId);
}

Still having problems with deletion of Lock Screen widgets on 4.2 (onReceive never called)