如何在RecyclerView中更改选定项目的背景色

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<String> data;
    private int selectedPosition = -1;

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

    @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) {
        holder.textView.setText(data.get(position));
        if (selectedPosition == position) {
            holder.itemView.setBackgroundColor(Color.YELLOW); // 选中时的背景色
        } else {
            holder.itemView.setBackgroundColor(Color.TRANSPARENT); // 未选中时的背景色
        }
    }

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

    public void setSelectedPosition(int position) {
        int oldPosition = selectedPosition;
        selectedPosition = position;
        notifyItemChanged(oldPosition);
        notifyItemChanged(position);
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView textView;

        public ViewHolder(View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp" />
</LinearLayout>