更改LiveData以更新RecyclerView。正确的方法？

public class MyViewModel extends ViewModel {
    private MutableLiveData<List<Item>> itemListLiveData = new MutableLiveData<>();

    public LiveData<List<Item>> getItemListLiveData() {
        return itemListLiveData;
    }

    public void updateItemList(List<Item> itemList) {
        itemListLiveData.setValue(itemList);
    }
}

public class MyActivity extends AppCompatActivity {
    private MyViewModel viewModel;
    private MyAdapter adapter;

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

        viewModel = new ViewModelProvider(this).get(MyViewModel.class);
        viewModel.getItemListLiveData().observe(this, new Observer<List<Item>>() {
            @Override
            public void onChanged(List<Item> itemList) {
                adapter.updateItemList(itemList);
            }
        });

        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        adapter = new MyAdapter();
        recyclerView.setAdapter(adapter);
    }
}

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<Item> itemList = new ArrayList<>();

    public void updateItemList(List<Item> itemList) {
        this.itemList = itemList;
        notifyDataSetChanged();
    }

    // 其他适配器相关的方法...
}