@Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
   if (viewType == ITEM_TYPE.ATY_TYPE.ordinal()) {
     return new AtyViewHolder(
         LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_item, parent, false));
   } else if (viewType == ITEM_TYPE.COMMENT_TYPE.ordinal()) {
     return new CommentViewHolder(
         LayoutInflater.from(parent.getContext()).inflate(R.layout.comment_item, parent, false));
   }
   return null;
 }
 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
   int a = getItemViewType(viewType);
   if (a == ITEM_TYPE.ATY_TYPE.ordinal()) {
     Log.d("test", "3");
     return new AtyViewHolder(
         LayoutInflater.from(parent.getContext()).inflate(R.layout.aty_item, parent, false));
   } else if (a == ITEM_TYPE.COMMENT_TYPE.ordinal()) {
     return new CommentViewHolder(
         LayoutInflater.from(parent.getContext()).inflate(R.layout.post_item, parent, false));
   }
   return null;
 }
 @Override
 public int getItemViewType(int position) {
   return position == 0 ? ITEM_TYPE.ATY_TYPE.ordinal() : ITEM_TYPE.COMMENT_TYPE.ordinal();
 }