在Room数据库对象上进行多选recyclerview

Question

我见过的每一篇教程都对具有包含项目属性和isSelected变量的类进行操作。创建项目列表时，它将存储其他变量并在onClick上对其进行更改。如何在使用Room数据库的回收者视图中进行设置？我要实现的是长按一下，即可选择多个项目。

ItemRecyclerAdapter

public class ItemRecyclerAdapter extends RecyclerView.Adapter<ItemRecyclerAdapter.ViewHolder> {

interface ActionCallback {
    void onClickListener(Item item);
    void onLongClickListener(Item item);
}

private Context context;
private List<Item> itemList;
private ActionCallback mActionCallbacks;

ItemRecyclerAdapter(Context context, List<Item> itemList) {
    this.context = context;
    this.itemList = itemList;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(context).inflate(R.layout.item_list, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    holder.bindData(position);
}

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

void updateData(List<Item> items) {
    this.itemList = items;
    notifyDataSetChanged();
}

//View Holder
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
    private TextView mNameTextView;
    private TextView mScrapCostTextView;
    private ImageView mImage;

    ViewHolder(View itemView) {
        super(itemView);

        itemView.setOnClickListener(this);
        itemView.setOnLongClickListener(this);

        mScrapCostTextView= itemView.findViewById(R.id.scrap_text_view);
        mNameTextView = itemView.findViewById(R.id.item_name_text_view);
        mImage = itemView.findViewById(R.id.image);
    }

    void bindData(int position) {
        Item item = itemList.get(position);

        mNameTextView.setText(item.getItemName());

        String scrapCost = String.valueOf(item.getScrapCost())+ " scrap";
        mScrapCostTextView.setText(scrapCost);

        mImage.setImageResource(item.getDrawablePath());
    }

    @Override
    public boolean onLongClick(View v) {
        if (mActionCallbacks != null) {
            mActionCallbacks.onLongClickListener(itemList.get(getAdapterPosition()));
        }
        return true;
    }

    @Override
    public void onClick(View view) {
        if (mActionCallbacks != null) {
            mActionCallbacks.onClickListener(itemList.get(getAdapterPosition()));
        }
    }
}

void addActionCallback(ActionCallback actionCallbacks) {
    mActionCallbacks = actionCallbacks;
}