Android implementation Press two times back key to exit the app interface

By pressing the back key two times, the Toast prompt pops up and the Exit function is pressed again. The key code is as follows:

The first way:

 /** * Press two times to return the key to exit */private int keybackclickcount = 0;        @Override protected void Onresume () {super.onresume ();    Keybackclickcount = 0;        } @Override public boolean onKeyDown (int keycode, keyevent event) {//TODO auto-generated method stub                    if (keycode = = keyevent.keycode_back) {switch (keybackclickcount++) {case 0:                            Toast.maketext (this, getresources (). getString (R.string.press_again_exit),                    Toast.length_short). Show ();                    Timer timer = new timer ();                            Timer.schedule (New TimerTask () {@Override public void run () {                        Keybackclickcount = 0;                    }}, 3000);                Break                    Case 1:mframetv.setvisibility (view.visible); Mimgtv.setvisibility (View.visible);                    Animation anim = animationutils.loadanimation (Mainactivity.this, R.anim.tv_off);                    Anim.setanimationlistener (New Tvoffanimlistener ());                    Mimgtv.startanimation (ANIM);                Break            Default:break; } <span style= "color: #ff0000;"                 > Return true;</span>} else if (keycode = = Keyevent.keycode_menu) {if (sm.ismenushowing ()) {            Toggle ();            } else {showmenu ();    }} return Super.onkeydown (KeyCode, event); }

The second way:

/** * Exit */private Boolean iswaitingexit = False by pressing the return key two times consecutively, @Overridepublic boolean onKeyDown (int keycode, keyevent event) { TODO auto-generated method stubif (keycode = = Keyevent.keycode_back) {if (iswaitingexit) {iswaitingexit = False;mframet V.setvisibility (0); mimgtv.setvisibility (0); Animation anim = animationutils.loadanimation (Mainactivity.this, R.anim.tv_off); Anim.setanimationlistener (new Tvoffanimlistener ()); Mimgtv.startanimation (anim);} else {Toast.maketext (This,getresources (). getString (R.string.press_again_exit), Toast.length_short). Show (); Iswaitingexit = true; Timer timer = new timer (); Timer.schedule (new TimerTask () {@Overridepublic void run () {iswaitingexit = false;}}, +); Retu RN true;} return true;} else if (keycode = = Keyevent.keycode_menu) {if (sm.ismenushowing ()) {toggle ();} else {showmenu ();}} Return Super.onkeydown (KeyCode, event);}

Android implementation Press two times back key to exit the app interface