Android Press once again to exit

There are two ways of doing this:

1). First click on the flag State, prompt and then press the exit, and then start the time, if more than 3 seconds did not press back again, all the state to zero, conversely, if the return key in 3 seconds again to exit.

BooleanIsexit =false; intTime = 0; @Override Public BooleanBack () {//TODO auto-generated Method Stub        if(!isexit) {Isexit=true; FinalTimer timer =NewTimer (); Timer.schedule (NewTimerTask () {@Override Public voidrun () {//TODO auto-generated Method Stubtime++; if(Time = = 3) {Isexit=false; time=0;                        Timer.cancel (); } System.out.println ( time+""); }            }, 0,1000); ShowMsg ("Press one more time to exit"); } Else if(Isexit && Time < 3) {finish (); }        return true; } @Override Public BooleanOnKeyDown (intKeyCode, KeyEvent event) {        //TODO auto-generated Method Stub        if(keycode==keyevent.keycode_back) {            returnBack (); }        return Super. OnKeyDown (KeyCode, event); }

2). First click on the time to write down the current time, the second click to take the current time and the last record time to do poor, if less than 3 seconds to exit, and vice versa will assign this time to mark time, prompt and then press the exit.

LongLasttime; @Override Public BooleanBack () {LongCurrtime=System.currenttimemillis (); if(currtime-lasttime>3000) {showmsg ("Press one more time to exit"); Lasttime=Currtime; }Else{finish (); }        return false; } @Override Public BooleanOnKeyDown (intKeyCode, KeyEvent event) {        //TODO auto-generated Method Stub        if(keycode==keyevent.keycode_back) {            returnBack (); }        return Super. OnKeyDown (KeyCode, event); }

Android Press once again to exit