如何共享viewPager持有者片段viewModel？

// 在共享的ViewModel类中定义需要共享的数据
public class SharedViewModel extends ViewModel {
    private MutableLiveData<String> sharedData = new MutableLiveData<>();

    public void setSharedData(String data) {
        sharedData.setValue(data);
    }

    public LiveData<String> getSharedData() {
        return sharedData;
    }
}

// 在ViewPager的持有者片段中获取共享的ViewModel实例并观察数据变化
public class ViewPagerFragment extends Fragment {
    private SharedViewModel sharedViewModel;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        sharedViewModel = ViewModelProviders.of(getActivity()).get(SharedViewModel.class);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // 省略布局文件的加载和其他代码

        // 观察共享的ViewModel中的数据变化
        sharedViewModel.getSharedData().observe(this, new Observer<String>() {
            @Override
            public void onChanged(String data) {
                // 处理数据变化
            }
        });

        return view;
    }
}

// 在其他需要访问共享ViewModel的片段中获取共享的ViewModel实例并观察数据变化
public class OtherFragment extends Fragment {
    private SharedViewModel sharedViewModel;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        sharedViewModel = ViewModelProviders.of(getActivity()).get(SharedViewModel.class);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // 省略布局文件的加载和其他代码

        // 观察共享的ViewModel中的数据变化
        sharedViewModel.getSharedData().observe(this, new Observer<String>() {
            @Override
            public void onChanged(String data) {
                // 处理数据变化
            }
        });

        return view;
    }
}