android-Double-click Back to exit the app

1 @Override2      Public BooleanOnKeyDown (intKeyCode, keyevent event)3     {4         if(KeyCode = =keyevent.keycode_back) {5 Quitapp ();6             return false;7}Else{8             return Super. OnKeyDown (KeyCode, event);9         }Ten     } One     /** A * Quit App -      */ -     Private voidQuitapp () { the         if(isexit) { -Intent Intent =NewIntent (intent.action_main); - intent.addcategory (intent.category_home); - startactivity (intent); +System.exit (0); -}Else{ +Isexit =true; ATools.showtext (Mcontext, "Press again to exit the app"); atMhandler.sendemptymessagedelayed (0, 2000); -         } -     } -Handler Mhandler =NewHandler () { -          Public voidhandlemessage (android.os.Message msg) { -             Super. Handlemessage (msg); inIsexit =false; -         }; to};

The second type:

1 @Override2      Public BooleanOnKeyDown (intKeyCode, keyevent event)3     {4         if(KeyCode = = Keyevent.keycode_back && event.getrepeatcount () = = 0)5 Quitapp ();6         return false;7     }8     Private LongExittime = 0;9     Private voidQuitapp () {Ten         if(System.currenttimemillis ()-Exittime > 2000){ OneTools.showtext (Mcontext, "Press again to exit the app"); AExittime =System.currenttimemillis (); -}Else{ - finish (); the         } -}