implements View.OnClickListener, View.OnLongClickListener

itemView.setOnClickListener(this);
itemView.setOnLongClickListener(this);

@Override
public void onClick(View v) {
    onclicklistner.onItemClick(getAdapterPosition(), v);
}

@Override
public boolean onLongClick(View v) {
    onclicklistner.onItemLongClick(getAdapterPosition(), v);
    return true;
}

public void setOnItemClickListener(onClickListner onclicklistner) {
    SampleAdapter.onclicklistner = onclicklistner;
}

public void setHeader(View v) {
    this.headerView = v;
}

public interface onClickListner {
    void onItemClick(int position, View v);
    void onItemLongClick(int position, View v);
}

package adaptor;

import android.annotation.SuppressLint;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.wings.example.recycleview.MainActivity;
import com.wings.example.recycleview.R;

import java.util.ArrayList;

public class SampleAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    Context context;
    private ArrayList<String> arrayList;
    private static onClickListner onclicklistner;
    private static final int VIEW_HEADER = 0;
    private static final int VIEW_NORMAL = 1;
    private View headerView;

    public SampleAdapter(Context context) {
        this.context = context;
        arrayList = MainActivity.arrayList;
    }

    public class HeaderViewHolder extends RecyclerView.ViewHolder {
        public HeaderViewHolder(View itemView) {
            super(itemView);
        }
    }

    public class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
        TextView txt_pos;
        SampleAdapter sampleAdapter;

        public ItemViewHolder(View itemView, SampleAdapter sampleAdapter) {
            super(itemView);

            itemView.setOnClickListener(this);
            itemView.setOnLongClickListener(this);

            txt_pos = (TextView) itemView.findViewById(R.id.txt_pos);
            this.sampleAdapter = sampleAdapter;

            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            onclicklistner.onItemClick(getAdapterPosition(), v);
        }

        @Override
        public boolean onLongClick(View v) {
            onclicklistner.onItemLongClick(getAdapterPosition(), v);
            return true;
        }
    }

    public void setOnItemClickListener(onClickListner onclicklistner) {
        SampleAdapter.onclicklistner = onclicklistner;
    }

    public void setHeader(View v) {
        this.headerView = v;
    }

    public interface onClickListner {
        void onItemClick(int position, View v);
        void onItemLongClick(int position, View v);
    }

    @Override
    public int getItemCount() {
        return arrayList.size()+1;
    }

    @Override
    public int getItemViewType(int position) {
        return position == 0 ? VIEW_HEADER : VIEW_NORMAL;
    }

    @SuppressLint("InflateParams")
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        if (viewType == VIEW_HEADER) {
            return new HeaderViewHolder(headerView);
        } else {
            View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.custom_recycler_row_sample_item, viewGroup, false);
            return new ItemViewHolder(view, this);
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
        if (viewHolder.getItemViewType() == VIEW_HEADER) {
            return;
        } else {
            ItemViewHolder itemViewHolder = (ItemViewHolder) viewHolder;
            itemViewHolder.txt_pos.setText(arrayList.get(position-1));
        }
    }
}

sampleAdapter.setOnItemClickListener(new SampleAdapter.onClickListner() {
    @Override
    public void onItemClick(int position, View v) {
        position = position+1;//As we are adding header
        Log.e(TAG + "ON ITEM CLICK", position + "");
        Snackbar.make(v, "On item click "+position, Snackbar.LENGTH_LONG).show();
    }

    @Override
    public void onItemLongClick(int position, View v) {
        position = position+1;//As we are adding header
        Log.e(TAG + "ON ITEM LONG CLICK", position + "");
        Snackbar.make(v, "On item longclick  "+position, Snackbar.LENGTH_LONG).show();
    }
});