public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    public TextView cityName;
    public ViewHolder(View view) {
        super(view);
        cityName = (TextView) view.findViewById(R.id.city_name);
        itemView.setOnClickListener(this); // bind the listener
    }
    @Override
    public void onClick(View view) {
        clickListener.onClick(view, getPosition()); // call the onClick in the OnItemClickListener
    }
}