RecycleView adapter for use with Android's DataBinding plugin.

DataBindingAdapter.java

package io.jug6ernaut.fln2;

import android.databinding.DataBindingUtil;
import android.databinding.ViewDataBinding;
import android.support.annotation.LayoutRes;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.view.View;
import android.view.ViewGroup;

import java.util.List;

/**
 * Created by williamwebb on 11/15/15.
 *
 * RecycleView Adapter class for use with DataBinding.
 */
public class DataBindingAdapter<DataType, BinderType extends ViewDataBinding> extends RecyclerView.Adapter<DataBindingAdapter.DataBindingViewHolder<DataType, BinderType>> {

	private final List<DataType> data;
	private final int            layoutId;
	private final int            variableId;

	/**
	 * Constructor.
	 *
	 * @param data data to populate the Adapter with
	 * @param layoutId layout used by the adapter
	 * @param variableId variable id used to set DataBinding. Ex: BR.data
	 */
	public DataBindingAdapter(List<DataType> data, @LayoutRes int layoutId, @LayoutRes int variableId) {
		this.data = data;
		this.layoutId = layoutId;
		this.variableId = variableId;
	}

	@Override
	public DataBindingViewHolder<DataType, BinderType> onCreateViewHolder(ViewGroup parent, int viewType) {
		View v = View.inflate(parent.getContext(), layoutId, null);
		return new DataBindingViewHolder<>(v, variableId);
	}
	@Override
	public void onBindViewHolder(DataBindingViewHolder<DataType, BinderType> holder, int position) {
		holder.setData(data.get(position));
	}

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

	static class DataBindingViewHolder<DataType, BinderType extends ViewDataBinding> extends ViewHolder {

		private final int variableId;
		private final BinderType dataBinding;

		public DataBindingViewHolder(View itemView, int variableId) {
			super(itemView);
			this.variableId = variableId;

			dataBinding = DataBindingUtil.bind(itemView);
		}

		public void setData(DataType data) {
			dataBinding.setVariable(variableId, data);
		}
	}
}