public int getItemCount() {
    Log.e("Serv+re", String.valueOf(recycleItems.size() + serverList.size()));
    return recycleItems.size() + serverList.size();
}


public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {

    int viewType = getItemViewType(position);

    switch (viewType) {
        case ITEM_data:
            Server server = serverList.get(position);
            ServerViewHolder v = (ServerViewHolder) holder;

            v.bind(position, listener);

        case ITEM_BANNER_AD:

        default:
            AdViewHolder bannerHolder = (AdViewHolder) holder;
            AdView adView = (AdView) recycleItems.get(position); //show error in this line
            ViewGroup adCardView = (ViewGroup) bannerHolder.itemView;
            if (adCardView.getChildCount() > 0) {
                adCardView.removeAllViews();
            }
            if (adView.getParent() != null) {
                ((ViewGroup) adView.getParent()).removeView(adView);
            }
            adCardView.addView(adView);

    }


}