Android: How do I avoid starting activity which is already in stack?

Question

Lets try to explain my question: I got an application and a service. The application is started with activity A. The service sends a broadcast that will let the application

Answer 1

I would suggest you use Intent.FLAG_ACTIVITY_CLEAR_TOP as it will remove all activities which start on top of your targeted activity.

eg :

Intent intent = new Intent(sourceActivity, Target activity);

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

startActivity(intent)