如何在RecyclerView的Adapter本身中获得之前的位置？

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<String> mData;
    private int mPreviousPosition = RecyclerView.NO_POSITION;

    public MyAdapter(List<String> data) {
        mData = data;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // 创建ViewHolder
        // ...
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        // 绑定数据到ViewHolder
        // ...

        // 保存当前位置到之前的位置变量
        mPreviousPosition = holder.getAdapterPosition();
    }

    @Override
    public int getItemCount() {
        return mData.size();
    }

    public int getPreviousPosition() {
        return mPreviousPosition;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        // ViewHolder的定义
        // ...
    }
}