public void addNewDatas(List<M> datas){
  if (datas != null) {
    mDatas.addAll(0,datas);
    notifyDataSetChanged();
  }
}

public void addNewDatas ( List < M > datas ) { if ( datas != null ) { mDatas . addAll ( 0 , datas ) ; notifyDataSetChanged ( ) ; } }
insert data to datas header ( example weibo refresh same newly data )
