@Override
 protected void onPause() {
   super.onPause();
   MobclickAgent.onPause(this);
 }
 @Override
 protected void onDestroy() {
   super.onDestroy();
   RefWatcher refWatcher = LeakCanaryApplication.getRefWatcher(this);
   refWatcher.watch(this);
 }
 @Override
 protected void onResume() {
   super.onResume();
   // 友盟session的统计
   MobclickAgent.onResume(this);
 }
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   //        requestWindowFeature(Window.FEATURE_NO_TITLE);
   LogUtil.i(LOG_TAG, getClass().getSimpleName());
 }