Quảng cáo xen kẽ có tặng thưởng (thử nghiệm)

class RewardedInterstitialExampleState extends State<RewardedInterstitialExample> {
  RewardedInterstitialAd? _rewardeInterstitialdAd;

  // TODO: replace this test ad unit with your own ad unit.
  final adUnitId = Platform.isAndroid
    ? 'ca-app-pub-3940256099942544/5354046379'
    : 'ca-app-pub-3940256099942544/6978759866';

  /// Loads a rewarded ad.
  void loadAd() {
    RewardedInterstitialAd.load(
        adUnitId: adUnitId,
        adRequest: const AdRequest(),
        adLoadCallback: RewardedInterstitialAdLoadCallback(
          // Called when an ad is successfully received.
          onAdLoaded: (ad) {
            debugPrint('$ad loaded.');
            // Keep a reference to the ad so you can show it later.
            _rewardedInterstitialAd = ad;
          },
          // Called when an ad request failed.
          onAdFailedToLoad: (LoadAdError error) {
            debugPrint('RewardedInterstitialAd failed to load: $error');
          },
        ));
  }
}

class RewardedInterstitialExampleState extends State<RewardedInterstitialExample> {
  RewardedInterstitialAd? _rewardedInterstitialAd;

  // TODO: replace this test ad unit with your own ad unit.
  final adUnitId = Platform.isAndroid
    ? 'ca-app-pub-3940256099942544/5354046379'
    : 'ca-app-pub-3940256099942544/6978759866';

  /// Loads a rewarded ad.
  void loadAd() {
    RewardedInterstitialAd.load(
        adUnitId: adUnitId,
        adRequest: const AdRequest(),
        adLoadCallback: RewardedInterstitialAdLoadCallback(
          // Called when an ad is successfully received.
          onAdLoaded: (ad) {
            ad.fullScreenContentCallback = FullScreenContentCallback(
              // Called when the ad showed the full screen content.
              onAdShowedFullScreenContent: (ad) {},
              // Called when an impression occurs on the ad.
              onAdImpression: (ad) {},
              // Called when the ad failed to show full screen content.
              onAdFailedToShowFullScreenContent: (ad, err) {
                // Dispose the ad here to free resources.
                ad.dispose();
              },
              // Called when the ad dismissed full screen content.
              onAdDismissedFullScreenContent: (ad) {
                // Dispose the ad here to free resources.
                ad.dispose();
              },
              // Called when a click is recorded for an ad.
              onAdClicked: (ad) {});

            debugPrint('$ad loaded.');
            // Keep a reference to the ad so you can show it later.
            _rewardedInterstitialAd = ad;
          },
          // Called when an ad request failed.
          onAdFailedToLoad: (LoadAdError error) {
            debugprint('RewardedInterstitialAd failed to load: $error');
          },
        ));
  }
}

_rewardedInterstitialAd.show(onUserEarnedReward: (AdWithoutView ad, RewardItem rewardItem) {
  // Reward the user for watching an ad.
});