Android再按一次完全退出程序代碼

1、退出應用程序工具類

 

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public class ExitAPPUtils extends Application {     private List activityList = new LinkedList();     private static ExitAPPUtils instance;         private ExitAPPUtils() {     }         // 單例模式中獲取唯一的ExitAPPUtils實例     public static ExitAPPUtils getInstance() {         if(null == instance) {             instance =new ExitAPPUtils();         }         return instance;     }         // 添加Activity到容器中     public void addActivity(Activity activity) {         activityList.add(activity);     }         // 遍歷所有Activity並finish         public void exit() {         for(Activity activity : activityList) {             activity.finish();         }         System.exit(0);     } }</activity></activity>

2、使用方法

 

在每個Activity的onCreate方法裏添加如下代碼

 

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1	ExitAPPUtils.getInstance().addActivity(this);

 

 

3、退出代碼，放到需要退出的Activity中。

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private long exitTime = 0; public boolean onKeyDown(int keyCode, KeyEvent event) {         if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN){             if((System.currentTimeMillis()-exitTime) > 2000){                 ToastUtils.show(getApplicationContext(), R.string.exit_hint);             exitTime = System.currentTimeMillis();         } else {             ExitAPPUtils.getInstance().exit();             //finish();             //System.exit(0);         }             return true;         }         return super.onKeyDown(keyCode, event);     } }