Android完全退出的方案

繼承Application，實現一個Activity的管理器容器，管理所有的Activity，在使用者明確退出應用的時候，迴圈遍曆所有的Activity，並調用其finish()。

虛擬碼如下：

 1 public class MyApplication extends Application { 2  3         private List<Activity> activityList = new LinkedList<Activity>(); 4         private static MyApplication instance; 5         private MyApplication() {} 6         public static MyApplication getInstance() { 7                 if ( instance == null ) { 8                         instance = new MyApplication(); 9                 }10                 return instance;11         }12 13         // 添加Activity到容器中14         public void addActivity(Activity activity) {15                 activityList.add(activity);16         }17 18         // 遍曆所有Activity並finish19         public void exit() {20                 for (Activity activity : activityList) {21                         activity.finish();22                 }23                 System.exit(0);24         }25 }

 

Activity Manager :

 1 public class ScreenManager { 2  3     private static Stack<Activity> activityStack; 4     private static ScreenManager instance; 5  6     public static ScreenManager getScreenManager() { 7         if (instance == null) { 8             instance = new ScreenManager(); 9         }10         return instance;11     }12     public Activity lastActivity() {13         Activity activity = activityStack.lastElement();14         return activity;15     }16     public void popActivity(Activity activity) {17         if (activity != null) {18             activityStack.remove(activity);19             activity = null;20         }21     }22     23     public int activityCount() {24         return activityStack.size();25     }26     27     public void pushActivity(Activity activity) {28         if (activityStack == null) {29             activityStack = new Stack<Activity>();30         }31         activityStack.add(activity);32     }33 34     public void popAllActivityExceptOne(Class cls) {35         while (true) {36             Activity activity = lastActivity();37             if (activity == null) {38                 break;39             }40             if (activity.getClass().equals(cls)) {41                 break;42             }43             popActivity(activity);44         }45     }46 }