@Override
 protected void buildListAdapter() {
   CommentListAdapter adapter =
       new CommentListAdapter(this, getDataList().getItemList(), getListView(), true, false);
   adapter.setTopTipBar(newMsgTipBar);
   timeLineAdapter = adapter;
   mPullToRefreshListView.setAdapter(timeLineAdapter);
 }
 @Override
 protected void onPostExecute(Boolean aBoolean) {
   super.onPostExecute(aBoolean);
   if (aBoolean) {
     ((CommentListAdapter) timeLineAdapter).removeItem(positon);
   }
 }