如果项目很少，则使RecycleView在屏幕中间显示项目

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

RecyclerView recyclerView = findViewById(R.id.recyclerView);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
recyclerView.setLayoutManager(layoutManager);

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    // 实现必要的方法
    // ...
}

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

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

public class ViewHolder extends RecyclerView.ViewHolder {
    TextView textView;

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

    public void bindData(String item) {
        textView.setText(item);
    }
}

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

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    String item = data.get(position);
    holder.bindData(item);
}

List<String> data = new ArrayList<>();
// 添加数据到data集合中

MyAdapter adapter = new MyAdapter(data);
recyclerView.setAdapter(adapter);