Recyclerview中嵌套Recyclerview添加分割线

getItemDecorationCount 这个方法等于0添加 不然会分割线重复添加

        viewHolder.recyclerviewPhoto.setVisibility(View.VISIBLE);
        LinearLayoutManager manager = new LinearLayoutManager(context);
        viewHolder.recyclerviewPhoto.setLayoutManager(manager);
        PhotoAdapter adapter = new PhotoAdapter(context, list.get(i).getMedia(), 1);
        viewHolder.recyclerviewPhoto.setAdapter(adapter);
        if (viewHolder.recyclerviewPhoto.getItemDecorationCount() == 0) {
            viewHolder.recyclerviewPhoto.addItemDecoration(new GridLayoutItemDecoration(context, R.drawable.item_divider_gridview));
         }