如何使用选择复选框设置GridView项目背景的样式？

<GridView
    android:id="@+id/gridView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:numColumns="auto_fit"
    android:columnWidth="100dp"
    android:stretchMode="columnWidth"
    android:gravity="center"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp" />

public class GridAdapter extends BaseAdapter {
    private Context mContext;
    private List<Item> mItems;

    public GridAdapter(Context context, List<Item> items) {
        mContext = context;
        mItems = items;
    }

    @Override
    public int getCount() {
        return mItems.size();
    }

    @Override
    public Object getItem(int position) {
        return mItems.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(R.layout.grid_item, parent, false);
            holder = new ViewHolder();
            holder.checkBox = convertView.findViewById(R.id.checkBox);
            holder.backgroundContainer = convertView.findViewById(R.id.backgroundContainer);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        Item item = mItems.get(position);
        holder.checkBox.setChecked(item.isSelected());

        // 设置背景样式
        if (item.isSelected()) {
            holder.backgroundContainer.setBackgroundColor(Color.BLUE);
        } else {
            holder.backgroundContainer.setBackgroundColor(Color.WHITE);
        }

        return convertView;
    }

    private static class ViewHolder {
        CheckBox checkBox;
        LinearLayout backgroundContainer;
    }
}

GridView gridView = findViewById(R.id.gridView);
List<Item> items = new ArrayList<>();
// 添加项目数据
// ...

GridAdapter adapter = new GridAdapter(this, items);
gridView.setAdapter(adapter);

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Item item = items.get(position);
        item.setSelected(!item.isSelected());
        adapter.notifyDataSetChanged();
    }
});