Application Level onResume Android

Question

Problem

The idea is very simple. Whenever an user comes back to my app from the Recents I want to show a simple dialog prompting with the password.<

Answer 1

You could try with this flag FLAG_ACTIVITY_LAUNCHER_FROM _HISTORY:

if((getIntent().getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY )!=0){
    Log.d(TAG, "Called from history");
    //clear flag from history
    Intent intent = getIntent().setFlags( getIntent().getFlags() & (~ Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY));
    setIntent(intent);
}

Source : Android - detecting application launch from home or history

When "A" Activity is start from recent, this flag is present. Now this flag will be also present if "A" activity call "B" activity and on "B" user press back. So you have to check flag and when you detect it you have clear intent by removing this flag, source: Remove a Paint Flag in Android