Frederikos

public class TitleItemViewModel {
    public final ObservableField<String> title = new ObservableField<>();

    public TitleItemViewModel() {
        title.set("Some title");
    }

    public void titleClicked(View view) {
        title.set("Title clicked");
    }

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<TextView
            style="@style/Subtitle"
            android:text="@{viewModel.title}"
	    android:onClick="@{viewModel.titleClicked}"/>

Frederikos

public final ObservableField<Boolean> isDataLoading = new ObservableField<>();

Frederikos

android:visibility="@{viewModel.isDataLoading ? android.view.View.VISIBLE : android.view.View.GONE}"

Frederikos

public final ObservableField<String> countVotes = new ObservableField<>();

Frederikos

public class PlacesAdapter extends  RecyclerView.Adapter<PlacesAdapter.BindingHolder> {

    private List<PlacesResponseModel.PlaceModel> places;
    private Activity activity;

    public PlacesAdapter(Activity activity, List<PlaceModel> places) {
        this.activity = activity;
        this.places = places;
    }

Frederikos

<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <variable
            name="viewModel"
            type="com.test.sample.viewmodel.PlaceItemViewModel" />
    </data>

    <LinearLayout

Frederikos

<data>
       <variable name="your sample name" type="com.sample.SampleClassName"/>
</data>

Frederikos

public class PlaceItemViewModel {

    private Context context;
    private PlaceModel placeModel;

    public PlaceItemViewModel(Context context, PlaceModel placeModel) {
        this.context = context;
        this.placeModel = placeModel;
    }

Frederikos

private ActivityMainBinding binding;

@Override
protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
 binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
 //tvTitle = TextView in layout with id = tv_title
	 binding.tvTitle.setText("Hello world!");
}