如何在cursorAdapter中使用新的系统架构ViewModel/LiveData？

// 步骤1：引入Android Architecture Components库

dependencies {
    implementation "androidx.lifecycle:lifecycle-viewmodel:2.4.0"
    implementation "androidx.lifecycle:lifecycle-livedata:2.4.0"
}

// 步骤2：创建一个继承自ViewModel的类

public class MyViewModel extends ViewModel {
    private MutableLiveData<Cursor> cursorLiveData;

    public LiveData<Cursor> getCursorLiveData() {
        if (cursorLiveData == null) {
            cursorLiveData = new MutableLiveData<>();
            loadCursorData();
        }
        return cursorLiveData;
    }

    private void loadCursorData() {
        // 从数据库或其他地方加载cursor数据
        // 将cursor数据设置给cursorLiveData对象
    }
}

// 步骤3：在Activity或Fragment中获取ViewModel实例

public class MyActivity extends AppCompatActivity {
    private MyViewModel viewModel;

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

        viewModel = ViewModelProviders.of(this).get(MyViewModel.class);
    }
}

// 步骤4：在ViewModel中创建LiveData对象

public class MyViewModel extends ViewModel {
    private MutableLiveData<Cursor> cursorLiveData;

    public LiveData<Cursor> getCursorLiveData() {
        if (cursorLiveData == null) {
            cursorLiveData = new MutableLiveData<>();
            loadCursorData();
        }
        return cursorLiveData;
    }

    private void loadCursorData() {
        // 从数据库或其他地方加载cursor数据
        // 将cursor数据设置给cursorLiveData对象
    }
}

// 步骤5：在Adapter中观察LiveData对象

public class MyAdapter extends CursorAdapter {
    private Context context;
    private LiveData<Cursor> cursorLiveData;

    public MyAdapter(Context context, Cursor cursor) {
        super(context, cursor, 0);
        this.context = context;
    }

    public void setCursorLiveData(LiveData<Cursor> cursorLiveData) {
        if (this.cursorLiveData != null) {
            this.cursorLiveData.removeObservers((LifecycleOwner) context);
        }
        this.cursorLiveData = cursorLiveData;
        this.cursorLiveData.observe((LifecycleOwner) context, new Observer<Cursor>() {
            @Override
            public void onChanged(Cursor cursor) {
                swapCursor(cursor);
            }
        });
    }

    // 其他Adapter相关的方法...
}