从API创建一个回收视图Android，但它不起作用

implementation 'androidx.recyclerview:recyclerview:1.2.1'

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" />

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    // 数据集合
    private List<String> data;

    // 构造函数
    public MyAdapter(List<String> data) {
        this.data = data;
    }

    // 创建列表项视图
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    // 绑定数据到列表项
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        String item = data.get(position);
        holder.textView.setText(item);
    }

    // 返回数据集合大小
    @Override
    public int getItemCount() {
        return data.size();
    }

    // 列表项视图持有者
    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView textView;

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

RecyclerView recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(new MyAdapter(data));