public class Adapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 
      List<Content> contents = Collections.emptyList(); 
      private Activity activity; 
      private static final int TYPE_ITEM = 1; 
      private static final int TYPE_AD = 2; 
   
      public Adapter(Activity activity, List<Content> contents) { 
          this.activity = activity; 
          this.contents = contents; 
      } 
   
      public static class MyViewHolder extends RecyclerView.ViewHolder { 
          public TextView tv_baslik, tv_icerik, tv_tarih; 
          // 
          // 
   
          public MyViewHolder(View itemView) { 
              super(itemView); 
               tv_baslik = (TextView) itemView.findViewById(R.id.tv_baslik); 
             tv_icerik = (TextView) itemView.findViewById(R.id.tv_icerik); 
             tv_tarih = (TextView) itemView.findViewById(R.id.tv_tarih); 
              // 
             // 
   
          } 
      } 
   
      public static class ViewHolderAd extends RecyclerView.ViewHolder {  
          public AdView adView; 
   
          public ViewHolderAd(View itemView) { 
              super(itemView); 
              adView = (AdView) itemView.findViewById(R.id.adViewCat); 
          } 
      } 
   
      @Override 
      public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
          switch (viewType){ 
              case TYPE_AD: 
                  View adview=LayoutInflater.from(parent.getContext()).inflate(R.layout.banner_admob,parent,false); 
                  return new ViewHolderAd(adview); 
              case TYPE_ITEM: 
              default: 
                  View itemview=LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_list_item,parent,false); 
                  return new MyViewHolder(itemview); 
          } 
      } 
   
      @Override 
      public void onBindViewHolder(final RecyclerView.ViewHolder holder,final int position) { 
          int viewType=getItemViewType(position); 
          switch (viewType){ 
   
              case TYPE_AD: 
                  ViewHolderAd viewHolderAd = (ViewHolderAd) holder; 
                  AdRequest adRequest = new AdRequest.Builder() 
                          .addTestDevice(AdRequest.DEVICE_ID_EMULATOR) 
                          .addTestDevice("AAAA6E7352A8A93AC9FC2157FF2F3C") 
                          .build(); 
                  viewHolderAd.adView.loadAd(adRequest); 
                  Log.d("position",""+position); 
                  break; 
   
              case TYPE_ITEM: 
              default: 
                  final MyViewHolder viewHolder = (MyViewHolder) holder; 
                  Log.d("position1",""+position); 
                  viewHolder.tv_baslik.setText(contents.get(position).getBaslik()); 
                  viewHolder.tv_icerik.setText(Html.fromHtml(contents.get(position).getIcerik())); 
                  viewHolder.tv_tarih.setText(contents.get(position).getTarih()); 
                  break; 
          } 
   
      } 
   
      @Override 
      public int getItemViewType(int position) { 
          return (position % 4 == 0) ? TYPE_AD : TYPE_ITEM;  
      } 
   
      @Override 
      public int getItemCount() { 
   
          return contents.size(); 
      } 
   
  }