Force application to restart on first activity

Question

For an unknown reason, I can't get my application leaving properly so that when I push the home button and the app icon again, I resume where I was in the app. I would like to force the application to restart on the first Activity.

I suppose this has something to do with onDestroy() or maybe onPause() but I don't know what to do.

Answer 1

Here is an example to restart your app in a generic way by using the PackageManager:

Intent i = getBaseContext().getPackageManager()              .getLaunchIntentForPackage( getBaseContext().getPackageName() ); i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK); startActivity(i); 

Answer 2

The solution marked as 'answer' works but has one disadvantage that was critical for me. With FLAG_ACTIVITY_CLEAR_TOP your target activity will get onCreate called before your old activity stack receives onDestroy. While I have been clearing some necessary stuff in onDestroy I had to workaroud.

This is the solution that worked for me:

public static void restart(Context context, int delay) {     if (delay == 0) {         delay = 1;     }     Log.e("", "restarting app");     Intent restartIntent = context.getPackageManager()             .getLaunchIntentForPackage(context.getPackageName() );     PendingIntent intent = PendingIntent.getActivity(             context, 0,             restartIntent, Intent.FLAG_ACTIVITY_CLEAR_TOP);     AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);     manager.set(AlarmManager.RTC, System.currentTimeMillis() + delay, intent);     System.exit(2); } 

The idea is to fire a PendingIntent via AlarmManager that will be invoked a bit later, giving old activity stack some time to clear up.