@Override
 public boolean onQueryTextChange(String newText) {
   if (msuggestionsAdapter == null) {
     ToastUtils.showToast(this, "搜索初始化中,请稍候再试");
     return false;
   }
   msuggestionsAdapter.setUsername(username);
   msuggestionsAdapter.getFilter().filter(newText);
   msuggestionsAdapter.notifyDataSetChanged();
   return true;
 }