Android Program Click two times return key program exit

@Override
public boolean onKeyDown (int keycode, keyevent event) {
if (keycode = = Keyevent.keycode_back) {
Exitby2click ();
}
return false;
}
/** * Double Exit Function */
private static Boolean Isexit = false;
private void Exitby2click () {
Timer texit = null;
if (Isexit = = False) {
Isexit = true;
Ready to exit
Toast.maketext (This, "Press again to exit the program", Toast.length_short). Show ();
Texit = new Timer (); Texit.schedule (New TimerTask () {
@Override
public void Run () {
Isexit = false;
Cancel exit
}}, 2000);
If the return key is not pressed within 2 seconds, the start timer cancels out the task just performed
} else {
Finish ();
System.exit (0);
}
}

Android Program Click two times return key program exit