How to cancel alarm from AlarmManager

Question

I have met same issue like this . Delete alarm from AlarmManager using cancel() - Android

" I'm trying to create and delete an alarm in two different methods which are both called at different moments in the application. logic.

However when I call AlarmManager's cancel() method, the alarm isn't deleted."

In order to set :

            Intent myIntent = new Intent(getApplicationContext(),                     SessionReceiver.class);             PendingIntent pendingIntent = PendingIntent.getBroadcast(                     getApplicationContext(), 1, myIntent, 0);              AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);              alarmManager.set(AlarmManager.RTC, now.getTimeInMillis(),                     pendingIntent); 

In order to delete :

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);     Intent myIntent = new Intent(getApplicationContext(),             SessionReceiver.class);     PendingIntent pendingIntent = PendingIntent.getBroadcast(             getApplicationContext(), 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);      alarmManager.cancel(pendingIntent); 

But this doesn't remove an alarm registered. Thanks in advance.

Answer 1

The PendingIntent needs to be created exactly as it was when you start the AlarmManager, and it looks like the main issue is that you're using a different requestCode (zero instead of one).

For a quick fix, this should work:

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); Intent myIntent = new Intent(getApplicationContext(), SessionReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(                                  getApplicationContext(), 1, myIntent, 0);  alarmManager.cancel(pendingIntent); 

In order to use PendingIntent.FLAG_UPDATE_CURRENT flag, see below:

Setting:

Intent myIntent = new Intent(getApplicationContext(), SessionReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(                                 getApplicationContext(), 1, myIntent,                                  PendingIntent.FLAG_UPDATE_CURRENT);  AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);  alarmManager.set(AlarmManager.RTC, now.getTimeInMillis(), pendingIntent); 

Cancelling:

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); Intent myIntent = new Intent(getApplicationContext(), SessionReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(                                 getApplicationContext(), 1, myIntent,                                  PendingIntent.FLAG_UPDATE_CURRENT);  alarmManager.cancel(pendingIntent);