Android Studio返回到上一页和滚动条上的相同位置？

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" />

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

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    // ...

    @Override
    public long getItemId(int position) {
        // 返回每个列表项的唯一标识符
        return position;
    }

    // ...
}

private int lastVisibleItemPosition = 0;

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        lastVisibleItemPosition = ((LinearLayoutManager) recyclerView.getLayoutManager()).findLastVisibleItemPosition();
    }
});

@Override
public void onBackPressed() {
    Bundle bundle = new Bundle();
    bundle.putInt("scroll_position", lastVisibleItemPosition);
    super.onSaveInstanceState(bundle);
    super.onBackPressed();
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (savedInstanceState != null) {
        lastVisibleItemPosition = savedInstanceState.getInt("scroll_position");
    }

    // ...
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    // 绑定数据到视图

    if (position == lastVisibleItemPosition) {
        recyclerView.scrollToPosition(position);
    }
}