Interscroller

static class AdHolder extends RecyclerView.ViewHolder {
    public ViewGroup parent;
    AdHolder(View itemView) {
        super(itemView);
    }
}

It is important to call setParentRecyclerView(recyclerView) on InterscrollerPlacement. It is not necessary to call it within RecyclerView adapter, you can set the RecyclerView to placement anywhere in code when you have a reference to your RecyclerView.  Use InterscrollerContainer.getAdView(Context context) method to get  the ad view and return it in a ViewHolder.

@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    context = parent.getContext().getApplicationContext();
   if (viewType == AD_VIEW_TYPE) {
    InterscrollerPlacement placement = (InterscrollerPlacement)Controller
                                        .getInstance().getPlacement(placementId);
    placement.setParentRecyclerView(recyclerView);

ViewGroup adView = InterscrollerContainer.getAdView(context);
AdHolder adHolder = new AdHolder(adView);
return adHolder;
}

Inside the adapter’s onBindViewHolder you will need to retrieve a InterscrollerContainer object from the Placement object by calling it’s getContainer method and passing it the ApplicationContext and the AdRequest id as parameters. Then use the InterscrollerContainer.bindTo method to bind the Ad to the ViewHolder's itemView.

@Override
    public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder holder, final int position) {
        if (holder.getItemViewType() == 0 && holder instanceof AdHolder) {
            try {
                InterscrollerPlacement placement = (InterscrollerPlacement)Controller.getInstance().getPlacement(placementId);
                     // use next methods to customise UI (optional)
                placement.setFooterBackgroundColor(int color);
                placement.setHeaderBackgroundColor(int color);
                placement.setFooterColor(int color);
                placement.setHeaderColor(int color);
                placement.setBackgroundColor(int color);

               InterscrollerContainer container = placement
                         .getContainer(context, requestId, position);
               container.bindTo((ViewGroup) holder.itemView);
              } catch (DioSdkException e) {
                             // error handling
                    }
            }
     }

If you use dynamic widgets or just want to set different height or different top offset to Interscroller you can set it calling:

container.setInterscrollerHeight(int interscrollerHeight);
container.setInterscrollerOffset(int interscrollerOffset);

Before your activity is destroyed, OR, to remove the ad:  ad.close() to stop the ad and release the resources associated with it.

 try {
          Controller.getInstance()
                .getPlacement(<placementId>)
                .getAdRequestById(<requestId>)
                .getAdProvider().getAd().close();
     } catch (DioSdkException e) {
        // error handling
  }