TextInoutLayout如何通过数据绑定和Viewmodel中的Livedata观察字符串值？

<layout>
    <data>
        <variable
            name="viewModel"
            type="com.example.ViewModel" />
    </data>
    <LinearLayout
        ...
        >
        <com.google.android.material.textfield.TextInputLayout
            ...
            app:hint="@string/edit_text_hint"
            app:error="@{viewModel.errorMessage}">
            <com.google.android.material.textfield.TextInputEditText
                ...
                android:text="@={viewModel.textValue}" />
        </com.google.android.material.textfield.TextInputLayout>
    </LinearLayout>
</layout>

public class ViewModel extends ViewModel {
    private MutableLiveData<String> textValue = new MutableLiveData<>();

    public LiveData<String> getTextValue() {
        return textValue;
    }

    public void setTextValue(String value) {
        textValue.setValue(value);
    }
}

public class MainActivity extends AppCompatActivity {
    private ViewModel viewModel;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        viewModel = new ViewModelProvider(this).get(ViewModel.class);
        binding.setViewModel(viewModel);

        viewModel.getTextValue().observe(this, new Observer<String>() {
            @Override
            public void onChanged(String value) {
                // 在这里处理字符串值的变化
            }
        });
    }
}