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 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,而非即時的實際廣告。否則可能導致帳戶遭到停權。
要載入測試廣告,最簡單的方法就是使用獎勵廣告專用的測試廣告單元 ID:
/6499/example/rewarded
測試廣告單元經過設定,可在每次請求時傳回測試廣告,因此您在編寫程式碼、測試及偵錯時,可以在自己的應用程式中免費使用。請務必先將這些內容換成您自己的廣告單元 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: $error'); }, )); } }
獎勵廣告事件
使用 FullScreenContentCallback
即可監聽生命週期事件,例如廣告顯示或關閉時間。在顯示廣告前設定 RewardedAd.fullScreenContentCallback
,就能接收這些事件的通知。這個範例會實作每個方法,並將訊息記錄至主控台:
class RewardedExampleState extends State<RewardedExample> { RewardedAd? _rewardedAd; // TODO: replace this test ad unit with your own ad unit. final adUnitId = '/6499/example/rewarded'; /// Loads a rewarded ad. void loadAd() { RewardedAd.loadWithAdManagerAdRequest( adUnitId: adUnitId, adManagerAdRequest: const AdManagerAdRequest(), adLoadCallback: RewardedAdLoadCallback( // Called when an ad is successfully received. onAdLoaded: (ad) { ad.fullScreenContentCallback = FullScreenContentCallback( // Called when the ad showed the full screen content. onAdShowedFullScreenContent: (ad) {}, // Called when an impression occurs on the ad. onAdImpression: (ad) {}, // Called when the ad failed to show full screen content. onAdFailedToShowFullScreenContent: (ad, err) { // Dispose the ad here to free resources. ad.dispose(); }, // Called when the ad dismissed full screen content. onAdDismissedFullScreenContent: (ad) { // Dispose the ad here to free resources. ad.dispose(); }, // Called when a click is recorded for an ad. onAdClicked: (ad) {}); debugPrint('$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
會以重疊的形式顯示在所有應用程式內容上方,且會靜態放置,因此無法新增至 Flutter 小工具樹狀結構。您可以呼叫 show()
來選擇廣告的放送時機。RewardedAd.show()
會使用 OnUserEarnedRewardCallback
,系統會在使用者獲得獎勵時叫用此項目。請務必實作此內容,並獎勵觀看廣告的使用者。
_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
便無法透過程式輔助方式移除,而且需要使用者輸入內容。RewardedAd
只能顯示一次,後續呼叫也會觸發 onAdFailedToShowFullScreenContent
。
不再需要放送的廣告時,必須予以處理。呼叫 dispose()
的時機最佳做法是位於 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。