RecyclerViewAdapterWrapper.java

package io.virtualapp.abs.nestedadapter;

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

public class RecyclerViewAdapterWrapper extends RecyclerView.Adapter {

    protected final RecyclerView.Adapter wrapped;

    public RecyclerViewAdapterWrapper(RecyclerView.Adapter wrapped) {
        super();
        this.wrapped = wrapped;
        this.wrapped.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
            public void onChanged() {
                notifyDataSetChanged();
            }

            public void onItemRangeChanged(int positionStart, int itemCount) {
                notifyItemRangeChanged(positionStart, itemCount);
            }

            public void onItemRangeInserted(int positionStart, int itemCount) {
                notifyItemRangeInserted(positionStart, itemCount);
            }

            public void onItemRangeRemoved(int positionStart, int itemCount) {
                notifyItemRangeRemoved(positionStart, itemCount);
            }

            public void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {
                notifyItemMoved(fromPosition, toPosition);
            }
        });
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return wrapped.onCreateViewHolder(parent, viewType);
    }


    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        wrapped.onBindViewHolder(holder, position);
    }

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

    @Override
    public int getItemViewType(int position) {
        return wrapped.getItemViewType(position);
    }

    @Override
    public void setHasStableIds(boolean hasStableIds) {
        wrapped.setHasStableIds(hasStableIds);
    }

    @Override
    public long getItemId(int position) {
        return wrapped.getItemId(position);
    }

    @Override
    public void onViewRecycled(RecyclerView.ViewHolder holder) {
        wrapped.onViewRecycled(holder);
    }

    @Override
    public boolean onFailedToRecycleView(RecyclerView.ViewHolder holder) {
        return wrapped.onFailedToRecycleView(holder);
    }

    @Override
    public void onViewAttachedToWindow(RecyclerView.ViewHolder holder) {
        wrapped.onViewAttachedToWindow(holder);
    }

    @Override
    public void onViewDetachedFromWindow(RecyclerView.ViewHolder holder) {
        wrapped.onViewDetachedFromWindow(holder);
    }

    @Override
    public void registerAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
        wrapped.registerAdapterDataObserver(observer);
    }

    @Override
    public void unregisterAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
        wrapped.unregisterAdapterDataObserver(observer);
    }

    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        wrapped.onAttachedToRecyclerView(recyclerView);
    }

    @Override
    public void onDetachedFromRecyclerView(RecyclerView recyclerView) {
        wrapped.onDetachedFromRecyclerView(recyclerView);
    }

    public RecyclerView.Adapter getWrappedAdapter() {
        return wrapped;
    }
}