在更新回收者视图列表的数据集时，它的滚动条跳回到顶部(重复)

adapter.notifyDataSetChanged();

// 假设你只更新了位置position的数据
adapter.notifyItemChanged(position);

// 保存滚动位置
int scrollPosition = ((LinearLayoutManager) recyclerView.getLayoutManager()).findFirstVisibleItemPosition();

// 更新数据
adapter.notifyDataSetChanged();

// 恢复滚动位置
recyclerView.scrollToPosition(scrollPosition);

DiffUtil.Callback callback = new DiffUtil.Callback() {
    @Override
    public int getOldListSize() {
        return oldList.size();
    }

    @Override
    public int getNewListSize() {
        return newList.size();
    }

    @Override
    public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
        return oldList.get(oldItemPosition).getId() == newList.get(newItemPosition).getId();
    }

    @Override
    public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
        return oldList.get(oldItemPosition).equals(newList.get(newItemPosition));
    }
};

DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(callback);
diffResult.dispatchUpdatesTo(adapter);