how to close android app completely

Question

I created an android application with a logout option in onCreateOptionsMenu. The Logout works perfectly but when I press the back button again it takes me to t

Answer 1

Even if it looks ok killing process will cause you headache in future. You can ensure this by following use case:

1. call several activities to populate activities stack
2. call android.os.Process.killProcess(pid);
3. open your application

OBSERVED: Your application opens not from main activity in inconsistent way. This is because Android consider killing of process like crash.

You can find more detailed information here: Is quitting an application frowned upon?