Exit/Finish an app/activity - android

Question

I\'ve got 4 activities say Act1, Act2, Act3 and Act4. A button in Act1 opens Act2, a button in Act2 opens Act3, a button in A

Answer 1

Place this code in your app:

moveTaskToBack(true);
android.os.Process.killProcess(Process.myPid());
System.exit(1);