Simple wrapper for RecyclerAdapter.

WrapperRecyclerAdapter.java

package recyclerview.adapter;

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

@SuppressWarnings("unchecked")
public class WrapperRecyclerAdapter extends RecyclerView.Adapter {

    private final RecyclerView.Adapter mAdapter;

    public WrapperRecyclerAdapter(RecyclerView.Adapter adapter) {
        super.setHasStableIds(adapter.hasStableIds());
        mAdapter = adapter;
        mAdapter.registerAdapterDataObserver(new ForwardingDataSetObserver());
    }

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

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

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

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

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

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


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

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

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

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

    private class ForwardingDataSetObserver extends RecyclerView.AdapterDataObserver {

        @Override public void onChanged() {
            notifyDataSetChanged();
        }

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

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

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

        @Override
        public void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {
           notifyDataSetChanged(); //TODO
        }
    }

}