Android Double click the Back button to exit the program

To give everyone a brief talk today, Android double-click the Back button to exit the program.

@Override

public boolean onKeyDown (int keycode, keyevent event) {
TODO auto-generated Method Stub
if (keycode = = Keyevent.keycode_back)
{
Exitclick ();
}
return false;
}


private static Boolean Isexit = false;

private void Exitclick () {
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 Double click the Back button to exit the program