How to remove all notifications when an android app (activity or service) is killed?

Question

I have an app with an activity and an intent service running in the background.

There\'s also a notification which shows a progress bar with the progress of the backg

Answer 1

It seems that

onTaskRemoved

of the Service DOES get called when the user kills the application task (by swiping out the app in the "task manager". I am able to remove the Notification from here.