Question

Say that the user has started my App and then switched off to use the Browser (so we have 2 sets of Tasks running). After a while, something happens to my app that requires the user’s attention, so it posts a notification to notify the user. Is there a way to bring my App’s task (and the Activity on top of the stack) out from the background when user clicks on my notification?

Answer 1

In your notification you call an intent to start your app, if you ensure it has the following flags then it will be brought to front rather than creating another instance:

 Intent contentIntent = new Intent(this, ABC.class);
 contentIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | INTENT.FLAG_ACTIVITY_SINGLE_TOP);