GridLayoutManager gridLayoutManager;
    private List<String> list;
    private void bindData() {

        list = new ArrayList<>();
        for (int i = 0; i < 20; i++) {
            list.add("" + i);
        }

        gridLayoutManager = new GridLayoutManager(MainActivity.this, 1, LinearLayoutManager.VERTICAL, false);
        recyclerBjbView.setLayoutManager(gridLayoutManager);
        adapter = new VoteInfoAdapter(list);
        recyclerBjbView.setAdapter(adapter);

        setHeader(recyclerBjbView);
        setMiddle(recyclerBjbView);
    }



    //添加头部
    private void setHeader(RecyclerView view) {
        View header = LayoutInflater.from(MainActivity.this).inflate(R.layout.item_head, view, false);
        adapter.setHeaderView(header);

    }


    //在RecycleView 中间添加布局
    private void setMiddle(RecyclerView view) {
        View middle = LayoutInflater.from(MainActivity.this).inflate(R.layout.item_middle, view, false);
        adapter.setMiddleView(middle);
    }

  /**
     * 获取条目的真实位置
     */
    public int getRealPosition(RecyclerView.ViewHolder holder) {
        int position = holder.getLayoutPosition();
        return position - 2;
    }