@Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
   if (keyCode == KeyEvent.KEYCODE_BACK && KJActivityManager.create().getCount() < 2) {
     ViewInject.create().getExitDialog(this);
   }
   return super.onKeyDown(keyCode, event);
 }
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   KJActivityManager.create().addActivity(this);
   setRootView(); // 必须放在annotate之前调用
   AnnotateUtil.initBindView(this); // 必须放在initialization之前调用
   initialize();
   registerBroadcast();
 }
 @Override
 protected void onDestroy() {
   super.onDestroy();
   unRegisterBroadcast();
   KJActivityManager.create().finishActivity(this);
 }