How to fix Admob ads in listview

Question

I have build an android app , this app is news app , I fetched data in json view , now I want to add a ads in every 3 items below , now after trying some days successfully shows ads. my listview 5 number of data , ads showing number of data show in 4 , now i want to show all number of data and every three items below ads

public View getView(int i, View view, ViewGroup viewGroup) {


    if ((i + 1) / 3 == 1){

        View ad_view=LayoutInflater.from(c).inflate(R.layout.ad_layout,viewGroup,false);

        AdView  mAdView = ad_view.findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);

        return ad_view;


    } else {


        if (view == null) {
            view = LayoutInflater.from(c).inflate(R.layout.model_result, viewGroup, false);
        }


        TextView match_h = (TextView) view.findViewById(R.id.heding);

        User user = (User) this.getItem(i);

        final String mach_hed = user.getMathch_hed();
        match_h.setText(mach_hed);
       return view;
  }
}

Answer 1

Instead of (i + 1) / 3 == 1) try (i + 1) % 4 == 0) If will show ads, every 4th time. That means, after every 3 item, one ad will be shown.