朝花夕拾-android 自定义application 治理activity的生命周期

 1 private List<Activity> activityList = new LinkedList<Activity>();
 2 
 3 // 保存 所有activity的this
 4     public void addActivity(Activity activity) {
 5         activityList.add(activity);
 6     }
 7 
 8 public void exit() {
 9         // save cache data to db
10         CacheManager cacheManager = CacheManager.getInstance(this);
11         cacheManager.saveNewCache1ToDB();
12         this.msgNewListMap.clear();
13         for (Activity activity : activityList) {
14             activity.finish();
15         }
16     }

1 MyApplication.getInstance().addActivity(ChatListActivity.this);

 1 // 退出
 2     @Override
 3     public boolean onKeyDown(int keyCode, KeyEvent event) {
 4         // TODO Auto-generated method stub
 5         if (keyCode == KeyEvent.KEYCODE_BACK) {
 6             long currentTime = System.currentTimeMillis();
 7             if ((currentTime - touchTime) >= waitTime) {
 8                 showCustomToast(R.string.main_exit);
 9                 touchTime = currentTime;
10             } else {
11                 // android.os.Process.killProcess(android.os.Process.myPid());
12                 MyApplication.getInstance().exit();
13             }
14             return true;
15 
16         }
17         return super.onKeyDown(keyCode, event);
18     }