AndroidAnnotations RecyclerViewAdapterBase

RecyclerViewAdapterBase.java

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * https://github.com/androidannotations/androidannotations/wiki/Adapters-and-lists#recyclerview-and-viewholder
 */
public abstract class RecyclerViewAdapterBase<T, V extends View> extends RecyclerView.Adapter<ViewWrapper<V>> {

    protected List<T> items = new ArrayList<>();

    public final void clear() {
        final int size = items.size();
        items.clear();
        notifyItemRangeRemoved(0, size);
    }

    public final boolean add(T item) {
        final boolean result = items.add(item);
        notifyItemInserted(items.size() - 1);
        return result;
    }

    public final boolean addAll(Collection<? extends T> items) {
        final int position = this.items.size();
        final boolean result = this.items.addAll(items);
        notifyItemRangeInserted(position, items.size());
        return result;
    }

    public final T getItem(int position) {
        return items.get(position);
    }

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

    @Override
    public final ViewWrapper<V> onCreateViewHolder(ViewGroup parent, int viewType) {
        return new ViewWrapper<>(onCreateItemView(parent, viewType));
    }

    protected abstract V onCreateItemView(ViewGroup parent, int viewType);

    @Override
    public final void onBindViewHolder(ViewWrapper<V> viewHolder, int position) {
        onBindViewHolder(viewHolder.getView(), items.get(position));
    }

    protected abstract void onBindViewHolder(V view, T item);

    @Override
    public final void onBindViewHolder(ViewWrapper<V> holder, int position, List<Object> payloads) {
        onBindViewHolder(holder.getView(), items.get(position), payloads);
    }

    protected void onBindViewHolder(V view, T item, List<Object> payloads) {
        onBindViewHolder(view, item);
    }

    @Override
    public final void onViewRecycled(ViewWrapper<V> holder) {
        onViewRecycled(holder.getView());
    }

    protected void onViewRecycled(V view) {
    }

    @Override
    public final boolean onFailedToRecycleView(ViewWrapper<V> holder) {
        return onFailedToRecycleView(holder.getView());
    }

    protected boolean onFailedToRecycleView(V view) {
        return false;
    }

    @Override
    public final void onViewAttachedToWindow(ViewWrapper<V> holder) {
        onViewAttachedToWindow(holder.getView());
    }

    protected void onViewAttachedToWindow(V view) {
    }

    @Override
    public final void onViewDetachedFromWindow(ViewWrapper<V> holder) {
        onViewDetachedFromWindow(holder.getView());
    }

    protected void onViewDetachedFromWindow(V view) {
    }
}

ViewWrapper.java

import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
 * https://github.com/androidannotations/androidannotations/wiki/Adapters-and-lists#recyclerview-and-viewholder
 */
public class ViewWrapper<V extends View> extends RecyclerView.ViewHolder {

    private V view;

    public ViewWrapper(V itemView) {
        super(itemView);
        view = itemView;
    }

    public V getView() {
        return view;
    }
}