Android double-click the return key to exit the program, android double-click

Android double-click the return key to exit the program, android double-click

@ 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; // prepare to exit Toast. makeText (this, "exit the program again", Toast. LENGTH_SHORT ). show (); tExit = new Timer (); tExit. schedule (new TimerTask () {@ Override public void run () {isExit = false; // cancel logout }}, 2000); // if the return key is not pressed within 2 seconds, start the timer to cancel the task} else {finish (); System. exit (0 );}}