如何在RecyclerView GridLayout上滚动时选择项目？

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<Item> itemList;
    private List<Boolean> selectedItems;

    public MyAdapter(List<Item> itemList) {
        this.itemList = itemList;
        selectedItems = new ArrayList<>();
        for (int i = 0; i < itemList.size(); i++) {
            selectedItems.add(false);
        }
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Item item = itemList.get(position);
        holder.textView.setText(item.getName());

        // 设置项目的选中状态
        if (selectedItems.get(position)) {
            holder.itemView.setBackgroundColor(Color.BLUE);
        } else {
            holder.itemView.setBackgroundColor(Color.WHITE);
        }
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView textView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.text_view);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            int position = getAdapterPosition();
            if (position != RecyclerView.NO_POSITION) {
                // 更新选中项目的列表
                selectedItems.set(position, !selectedItems.get(position));
                notifyItemChanged(position);
            }
        }
    }
}

// 在Activity或Fragment中使用RecyclerView
RecyclerView recyclerView = findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
MyAdapter adapter = new MyAdapter(itemList);
recyclerView.setAdapter(adapter);

// 添加滚动监听器
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        
        // 获取当前可见的项目
        int firstVisibleItemPosition = ((GridLayoutManager) recyclerView.getLayoutManager()).findFirstVisibleItemPosition();
        int lastVisibleItemPosition = ((GridLayoutManager) recyclerView.getLayoutManager()).findLastVisibleItemPosition();
        
        // 检查当前可见的项目是否被选中
        for (int i = firstVisibleItemPosition; i <= lastVisibleItemPosition; i++) {
            if (adapter.getSelectedItems().get(i)) {
                // 执行相应的操作
                // ...
            }
        }
    }
});