如何在AndroidViewModel中初始化MutableLiveData的空数组？

private MutableLiveData<List<String>> emptyArrayLiveData = new MutableLiveData<>();

public MyViewModel(Application application) {
    super(application);
    emptyArrayLiveData.setValue(new ArrayList<>());
}

MyViewModel viewModel = ViewModelProviders.of(this).get(MyViewModel.class);
viewModel.getEmptyArrayLiveData().observe(this, emptyArray -> {
    // 处理空数组
});

public MutableLiveData<List<String>> getEmptyArrayLiveData() {
    return emptyArrayLiveData;
}