Android studio TextView值不会更新

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        textView.setText("新的文本");
    }
});

new Handler(Looper.getMainLooper()).post(new Runnable() {
    @Override
    public void run() {
        textView.setText("新的文本");
    }
});

<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="viewModel"
            type="com.example.MyViewModel" />
    </data>
    <TextView
        android:id="@+id/textView"
        android:text="@{viewModel.text}" />
</layout>

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

    public LiveData<String> getText() {
        return text;
    }

    public void updateText(String newText) {
        text.setValue(newText);
    }
}

public class MainActivity extends AppCompatActivity {
    private ActivityMainBinding binding;
    private MyViewModel viewModel;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        viewModel = new ViewModelProvider(this).get(MyViewModel.class);
        binding.setViewModel(viewModel);
        binding.setLifecycleOwner(this);

        viewModel.getText().observe(this, new Observer<String>() {
            @Override
            public void onChanged(String newText) {
                binding.textView.setText(newText);
            }
        });
    }
}

TextView textView = findViewById(R.id.wrong_id); // 错误的ID

TextView textView = findViewById(R.id.textView); // 正确的ID