tab3

class Tab3 extends StatefulWidget {
  const Tab3({Key? key}) : super(key: key);

  @override
  _Tab3State createState() => _Tab3State();
}

class _Tab3State extends State<Tab3> {

  late BannerAd banner;

  @override
  void didChangeDependecies() {
    super.didChangeDependencies();
    final adState = Provider.of<AdState>(context);
    adState.initialization.then((status) {
      setState(() {
        banner = BannerAd(
            size: AdSize.banner,
            adUnitId: adState.bannerAdUnitId,
            listener: adState.adListener,
            request: AdRequest(),
        )..load();
      });
    });
  }


  @override
  Widget build(BuildContext context) {

    return ListView(
      children: [
        if (banner == null)
          SizedBox(
          child: Container(),
          height: 50,
        )
        else
          Container(
            height: 50,
            child: AdWidget(ad: banner),
          )
      ],
    );
  }
}