Firebase Recyclerview(垂直滚动)始终在单击其他活动的后退按钮时滚动到开始位置

public class MainActivity extends AppCompatActivity {
    private RecyclerView recyclerView;
    private LinearLayoutManager layoutManager;
    private int scrollPosition;

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

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

        // 初始化RecyclerView适配器和数据

        // 恢复滚动位置
        if (savedInstanceState != null) {
            scrollPosition = savedInstanceState.getInt("scroll_position");
        }
    }

    @Override
    protected void onResume() {
        super.onResume();

        // 恢复滚动位置
        if (scrollPosition != RecyclerView.NO_POSITION) {
            layoutManager.scrollToPosition(scrollPosition);
        }
    }

    @Override
    protected void onPause() {
        super.onPause();

        // 保存滚动位置
        scrollPosition = layoutManager.findFirstVisibleItemPosition();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        // 保存滚动位置
        outState.putInt("scroll_position", scrollPosition);
    }
}