rewarded_ads.dart

import 'package:google_mobile_ads/google_mobile_ads.dart';

import 'ads.dart';

class AdReWarded{
  AdReWarded._();
  RewardedAd? _rewardedAd;
  int _numRewardedLoadAttempts = 0;
  int maxFailedLoadAttempts = 3;

  static AdReWarded instance=AdReWarded._();
  void createRewardedAd() {
    RewardedAd.load(
        adUnitId:AdsId.rewardedAdUnitId,
        request:  const AdRequest(),
        rewardedAdLoadCallback: RewardedAdLoadCallback(
          onAdLoaded: (RewardedAd ad) {
            print('$ad loaded.');
            _rewardedAd = ad;
            _numRewardedLoadAttempts = 0;
            _showRewardedAd();
          },
          onAdFailedToLoad: (LoadAdError error) {
            print('RewardedAd failed to load: $error');
            _rewardedAd = null;
            _numRewardedLoadAttempts += 1;
            if (_numRewardedLoadAttempts < maxFailedLoadAttempts) {
              createRewardedAd();
            }
          },
        ));
  }

  void _showRewardedAd() {
    if (_rewardedAd == null) {
      print('Warning: attempt to show rewarded before loaded.');
      return;
    }
    _rewardedAd!.fullScreenContentCallback = FullScreenContentCallback(
      onAdShowedFullScreenContent: (RewardedAd ad) =>
          print('ad onAdShowedFullScreenContent.'),
      onAdDismissedFullScreenContent: (RewardedAd ad) {
        print('$ad onAdDismissedFullScreenContent.');
        ad.dispose();
        createRewardedAd();
      },
      onAdFailedToShowFullScreenContent: (RewardedAd ad, AdError error) {
        print('$ad onAdFailedToShowFullScreenContent: $error');
        ad.dispose();
        createRewardedAd();
      },
    );

    _rewardedAd!.setImmersiveMode(true);
    _rewardedAd!.show(
        onUserEarnedReward: (AdWithoutView ad, RewardItem reward) {
          print('$ad with reward $RewardItem(${reward.amount}, ${reward.type})');
        });
    _rewardedAd = null;
  }
  void dispose() {
    _rewardedAd?.dispose();
  }
}