Exit android app on back pressed

Question

I am building an Android App. How to exit an Android App when back is pressed. Android version is 2.3.3 and above. The Android App goes to previous activity which i don\'t want.

Answer 1

In normal way you shouldn't close app - user will moves it to back by pressing home or closing your activities by pressing back.

But you can use this tips:

1) Close old activities after starting the new ones if they not needed in back stack:

startActivity(newActivityIntent);
finish();

2) You can move task to back (instead of close) if you need http://developer.android.com/reference/android/app/Activity.html#moveTaskToBack(boolean)

3) If you are really need it, you can use System.exit(0) but it's strongly not recommended and usually says that you have application's architecture problems.