獎勵廣告

選取平台: Android iOS Unity Flutter

使用者可選擇與獎勵廣告互動以換取應用程式內獎勵。本指南說明如何將 AdMob 的獎勵廣告整合至 Flutter 應用程式。

請務必使用測試廣告進行測試

建構及測試應用程式時,請務必使用測試廣告,而非實際運作中的廣告,否則可能導致帳戶遭停權。

如要載入測試廣告,最簡單的方法是使用獎勵廣告專用的測試廣告單元 ID:

Android

ca-app-pub-3940256099942544/5224354917

iOS

ca-app-pub-3940256099942544/1712485313

測試廣告單元會在每次請求時傳回測試廣告。在編寫程式碼、測試及偵錯階段,您可以自由在應用程式中使用這些廣告單元,但發布前記得要換成自己的廣告單元 ID。

載入廣告

以下是載入獎勵廣告的程式碼範例:

class RewardedExampleState extends State<RewardedExample> {
  RewardedAd? _rewardedAd;

  // TODO: replace this test ad unit with your own ad unit.
  final adUnitId = Platform.isAndroid
    ? 'ca-app-pub-3940256099942544/5224354917'
    : 'ca-app-pub-3940256099942544/1712485313';

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

獎勵廣告事件

您可以使用 FullScreenContentCallback 監聽生命週期事件,例如廣告顯示或關閉的時刻。只要在顯示廣告前設定 RewardedAd.fullScreenContentCallback,即可接收這些事件通知。這個範例會導入每個方法,並在控制台中記下資訊:

class RewardedExampleState extends State<RewardedExample> {
  RewardedAd? _rewardedAd;

  // TODO: replace this test ad unit with your own ad unit.
  final adUnitId = Platform.isAndroid
    ? 'ca-app-pub-3940256099942544/5224354917'
    : 'ca-app-pub-3940256099942544/1712485313';

  /// Loads a rewarded ad.
  void loadAd() {
    RewardedAd.load(
        adUnitId: adUnitId,
        request: const AdRequest(),
        adLoadCallback: RewardedAdLoadCallback(
          // 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.
            _rewardedAd = ad;
          },
          // Called when an ad request failed.
          onAdFailedToLoad: (LoadAdError error) {
            debugPrint('RewardedAd failed to load: $error');
          },
        ));
  }
}

多媒體廣告

RewardedAd 會重疊在所有應用程式內容上,而且位置固定,因此無法加入 Flutter 小工具樹狀結構。您可以藉由呼叫 show() 來選擇何時顯示廣告。RewardedAd.show() 需要接收 OnUserEarnedRewardCallback 回呼函式,該函式會在使用者獲得獎勵時觸發。請務必實作這個函式,並在使用者觀看廣告後給予獎勵。

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

呼叫 show() 後,以這種方式顯示的 Ad 無法以程式輔助移除,必須由使用者操作才能關閉。RewardedAd 只能顯示一次,再次呼叫 show() 會觸發 onAdFailedToShowFullScreenContent

不再需要某則廣告時,請務必釋放相關資源。最佳做法是在 FullScreenContentCallback.onAdDismissedFullScreenContentFullScreenContentCallback.onAdFailedToShowFullScreenContent 回呼中呼叫 dispose()

大功告成!您的應用程式已能順利顯示獎勵廣告。

GitHub 上的完整範例

獎勵廣告