獎勵廣告是使用者可以選擇與換取應用程式內獎勵的廣告。本指南說明如何將 Ad Manager 的獎勵廣告整合至 Flutter 應用程式。
一律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,而非實際製作的廣告。否則您的帳戶可能會遭到停權。
如要載入測試廣告,最簡單的方法是使用獎勵廣告專用測試廣告單元編號:
/6499/example/rewarded
測試廣告單元已設為針對每個請求傳回測試廣告,而您可以在自己的應用程式中自由使用這些廣告單元,藉此編寫、測試及偵錯。請務必先將這些編號換成自己的廣告單元 ID,再發布應用程式。
載入廣告
以下範例會載入獎勵廣告:
class RewardedExampleState extends State<RewardedExample> { RewardedAd? _rewardedAd; // TODO: replace this test ad unit with your own ad unit. final adUnitId = '/6499/example/rewarded'; /// Loads a rewarded ad. void loadAd() { RewardedAd.loadWithAdManagerAdRequest( adUnitId: adUnitId, adManagerAdRequest: const AdManagerAdRequest(), 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: $error'); }, )); } }
獎勵廣告事件
透過使用 FullScreenContentCallback
,您可以監聽生命週期事件,例如廣告顯示或關閉的時間。只要在顯示廣告前設定 RewardedAd.fullScreenContentCallback
,即可接收這些事件的通知。這個範例會實作每個方法,並將訊息記錄到主控台:
class RewardedExampleState extends State<RewardedExample> { RewardedAd? _rewardedAd; // TODO: replace this test ad unit with your own ad unit. final adUnitId = '/6499/example/rewarded'; /// Loads a rewarded ad. void loadAd() { RewardedAd.loadWithAdManagerAdRequest( adUnitId: adUnitId, adManagerAdRequest: const AdManagerAdRequest(), adLoadCallback: RewardedAdLoadCallback( // Called when an ad is successfully received. onAdLoaded: (ad) { ad.fullScreenContentCallback = FullScreenContentCallback( // Called when the ad showed the full screen content. onAdShowedFullScreenContent: (ad) {}, // Called when an impression occurs on the ad. onAdImpression: (ad) {}, // Called when the ad failed to show full screen content. onAdFailedToShowFullScreenContent: (ad, err) { // Dispose the ad here to free resources. ad.dispose(); }, // Called when the ad dismissed full screen content. onAdDismissedFullScreenContent: (ad) { // Dispose the ad here to free resources. ad.dispose(); }, // Called when a click is recorded for an ad. onAdClicked: (ad) {}); debugPrint('$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
會以重疊方式顯示在所有應用程式內容上方,並以靜態方式放置,因此無法新增至 Flutter 小工具樹狀結構。您可以呼叫 show()
來選擇廣告顯示時機。RewardedAd.show()
會採用 OnUserEarnedRewardCallback
,在使用者獲得獎勵時叫用。請務必導入這項元素,並在使用者觀看廣告時給予獎勵。
_rewardedAd.show(onUserEarnedReward: (AdWithoutView ad, RewardItem rewardItem) { // Reward the user for watching an ad. });
呼叫 show()
後,這種顯示的 Ad
無法透過程式輔助方式移除,而是需要使用者輸入內容。RewardedAd
只能顯示一次,後續的呼叫將觸發 onAdFailedToShowFullScreenContent
。
如果不再需要某則廣告,就必須拒登。呼叫 dispose()
的時機,最佳做法是在 FullScreenContentCallback.onAdDismissedFullScreenContent
和 FullScreenContentCallback.onAdFailedToShowFullScreenContent
回呼中。
大功告成!您的應用程式現在可以顯示獎勵廣告了。