Data Bound RecyclerView Adapter

Activity.java

public class Activity extends AppCompatActivity {  
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    RecyclerView recyclerView = getRecyclerView();
    List<Item> items = getItems(); 
    recyclerView.setAdapter(new DataAdapter(items));
  }
  
  static class Adapter extends DataBoundAdapter<Item, ItemBinding> {
    public Adapter(List<Item> items) {
      super(items, R.layout.item);
    }
  }
  
}

DataBoundAdapter.java

abstract class DataBoundAdapter<M extends ViewModel, B extends ViewDataBinding>
        extends RecyclerView.Adapter<DataBoundAdapter.ViewHolder<B>> {

  private final List<M> viewModels;
  private final int itemLayoutId;

  public DataBoundAdapter(List<M> viewModels, int itemLayoutId) {
    this.itemLayoutId = itemLayoutId;
      this.viewModels = viewModels;
  }

  @Override
  public ViewHolder<B> onCreateViewHolder(ViewGroup parent, int viewType) {
    B binding = DataBindingUtil.inflate(
        LayoutInflater.from(parent.getContext()), itemLayoutId, parent, false);
    return new ViewHolder<>(binding);
  }

  @Override
  public void onBindViewHolder(ViewHolder<B> holder, int position) {
    ViewDataBinding binding = holder.getBinding();
    binding.setVariable(BR.model, viewModels.get(position));
    binding.executePendingBindings();
  }

  @Override
  public int getItemCount() {
    return viewModels.size();
  }

  static class ViewHolder<T extends ViewDataBinding> extends RecyclerView.ViewHolder {
    private T binding;

    public ViewHolder(T binding) {
      super(binding.getRoot());
      this.binding = binding;
    }

    public T getBinding() {
      return binding;
    }
  }
}