Android 按两下退出APK的实现

来源：互联网发布：mac能用的绘画软件编辑：程序博客网时间：2024/06/11 10:20

app开发中，经常需要按下两次退出apk，以下是实现方式：

     private static Boolean isExit = false;     private static Boolean hasTask = false;     Timer tExit = new Timer();     TimerTask task = new TimerTask() {             @Override     public void run() {          isExit = false;          hasTask = true;       }     };     @Override     public boolean onKeyDown(int keyCode, KeyEvent event) {          if (keyCode == KeyEvent.KEYCODE_BACK) {               if(isExit == false ) {                   isExit = true;                   Toast.makeText(this, "再点击返回键，退出程序",          Toast.LENGTH_SHORT).show();               if(!hasTask) {                    tExit.schedule(task, 2000);                  }               } else {                   finish();                    System.exit(0);               }          }          if (keyCode==KeyEvent.KEYCODE_MENU) {               openOptionsMenu();              }     return true;     }

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