我试图在听众打印广告加载之前展示广告

Question

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    loadInter();
  }

  loadInter() {
    final adState = Provider.of<AdState>(context);
    adState.initialization.then((status) {
      interAd = InterstitialAd(
          adUnitId: adState.bannerAdUnitId,
          request: AdRequest(),
          listener: adState.listener);
      interAd.load();
    });
  }

我有点不确定放在哪里 interAd.show(); 我想在听众打印时调用它 I/flutter (10349): Ad loaded. 但我一直提前调用它并得到 E/FlutterInterstitialAd(10349): The interstitial wasn't loaded yet.

adstate class

class AdState {
  Future<InitializationStatus> initialization;

  AdState(this.initialization);

  String get bannerAdUnitId => Platform.isAndroid
      ? "ca-app-pub-3940256099942544/1033173712"
      : "ca-app-pub-3940256099942544/4411468910";

  final AdListener listener = AdListener(
    // Called when an ad is successfully received.
    onAdLoaded: (Ad ad) {
      
      print('Ad loaded.');
    },
    // Called when an ad request failed.
    onAdFailedToLoad: (Ad ad, LoadAdError error) {
      print('Ad failed to load: $error');
    },
    // Called when an ad opens an overlay that covers the screen.
    onAdOpened: (Ad ad) => print('Ad opened.'),
    // Called when an ad removes an overlay that covers the screen.
    onAdClosed: (Ad ad) => print('Ad closed.'),
    // Called when an ad is in the process of leaving the application.
    onApplicationExit: (Ad ad) => print('Left application.'),
  );
}

我想在调用侦听器 onAdLoaded(Ad ad) 时执行 show();。我尝试为状态 class 实现一个 AdListener，但在我的状态 class.

中没有调用该函数

Answer 1

您似乎没有await希望初始化正确完成。尝试将 loadInter 方法标记为 asnyc 和 await 以完成初始化。然后你可以加载广告，然后你可以添加一个 setter 到你的 AdState class，传递加载的广告以在听众通知你广告已加载时显示它。

class AdState {
  Future<InitializationStatus> initialization;

  // This field will let you store the ad.
  InterstitialAd _ad;

  AdState(this.initialization);

  void setAd(InterstitialAd ad) {
    _ad = ad;
  }

  String get bannerAdUnitId => Platform.isAndroid
      ? "ca-app-pub-3940256099942544/1033173712"
      : "ca-app-pub-3940256099942544/4411468910";

  final AdListener listener = AdListener(
    // Called when an ad is successfully received.
    onAdLoaded: (_) {
      if (_ad != null) {
        _ad.show();
      }
    },
    // Called when an ad request failed.
    onAdFailedToLoad: (Ad ad, LoadAdError error) {
      print('Ad failed to load: $error');
    },
    // Called when an ad opens an overlay that covers the screen.
    onAdOpened: (Ad ad) => print('Ad opened.'),
    // Called when an ad removes an overlay that covers the screen.
    onAdClosed: (Ad ad) => print('Ad closed.'),
    // Called when an ad is in the process of leaving the application.
    onApplicationExit: (Ad ad) => print('Left application.'),
  );
}

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    loadInter();
  }

  void loadInter() async {
    final adState = Provider.of<AdState>(context);
    adState.setAd(interAd);
    final status = await adState.initialization;
    interAd = InterstitialAd(
          adUnitId: adState.bannerAdUnitId,
          request: AdRequest(),
          listener: adState.listener);
    await interAd.load();
  }

更新广告并在 InterstitialAd 的侦听器为您提供 .loaded 事件时显示广告可能更清晰。有关详细信息和代码示例，请参阅 this medium article on how to add AdMob in Flutter。

我试图在听众打印广告加载之前展示广告

Im trying to show ad before listener prints ad loaded

flutter

admob