獎勵廣告自訂事件

必要條件

完成自訂事件設定。

請求獎勵廣告

當刊登序列中介服務鏈中到達自訂事件委刊項時，系統會使用您在建立自訂事件時提供的類別名稱呼叫the loadRewardedAd() method 。在此情況下，該方法位於 SampleCustomEvent 中，接著在 SampleRewardedCustomEventLoader中呼叫the loadRewardedAd() method 。

如要請求獎勵廣告，請建立或修改可擴充 Adapter 的類別，導入 loadRewardedAd()。此外，您也可以建立新類別來實作 MediationRewardedAd。

在自訂事件範例中，SampleCustomEvent 會實作the Adapter interface ，然後委派給SampleRewardedCustomEventLoader。

package com.google.ads.mediation.sample.customevent;

import com.google.android.gms.ads.mediation.Adapter;
import com.google.android.gms.ads.mediation.MediationRewardedAdConfiguration;
import com.google.android.gms.ads.mediation.MediationAdConfiguration;
import com.google.android.gms.ads.mediation.MediationAdLoadCallback;
import com.google.android.gms.ads.mediation.MediationRewardedAd;
import com.google.android.gms.ads.mediation.MediationRewardedAdCallback;
...

public class SampleCustomEvent extends Adapter {

  private SampleNativeCustomEventLoader nativeLoader;

  @Override
  public void loadRewardedAd(
      @NonNull MediationRewardedAdConfiguration mediationRewardedAdConfiguration,
      @NonNull
          MediationAdLoadCallback<MediationRewardedAd, MediationRewardedAdCallback>
              mediationAdLoadCallback) {
    rewardedLoader =
        new SampleRewardedCustomEventLoader(
            mediationRewardedAdConfiguration, mediationAdLoadCallback);
    rewardedLoader.loadAd();
  }
}

「SampleRewardedCustomEventLoader 」負責以下工作：

• 載入獎勵廣告

• 導入 MediationRewardedAd interface

• 接收及回報 Google Mobile Ads SDK 的廣告事件回呼

廣告設定包含 AdMob UI 中定義的選用參數。您可以透過 adConfiguration.getServerParameters().getString(MediationConfiguration.CUSTOM_EVENT_SERVER_PARAMETER_FIELD) 存取這個參數。這個參數通常是廣告聯播網 SDK 在執行個體化廣告物件時所需的廣告單元 ID。

package com.google.ads.mediation.sample.customevent;

import com.google.android.gms.ads.mediation.Adapter;
import com.google.android.gms.ads.mediation.MediationRewardedAdConfiguration;
import com.google.android.gms.ads.mediation.MediationAdLoadCallback;
import com.google.android.gms.ads.mediation.MediationRewardedAd;
import com.google.android.gms.ads.mediation.MediationRewardedAdCallback;
...

public class SampleRewardedCustomEventLoader extends SampleRewardedAdListener
    implements MediationRewardedAd {

  /** Configuration for requesting the rewarded ad from the third-party network. */
  private final MediationRewardedAdConfiguration mediationRewardedAdConfiguration;

  /**
   * A {@link MediationAdLoadCallback} that handles any callback when a Sample
   * rewarded ad finishes loading.
   */
  private final MediationAdLoadCallback<MediationRewardedAd, MediationRewardedAdCallback>
      mediationAdLoadCallback;

  /** Callback for rewarded ad events. */
  private MediationRewardedAdCallback rewardedAdCallback;

  /** Constructor. */
  public SampleRewardedCustomEventLoader(
      @NonNull MediationRewardedAdConfiguration mediationRewardedAdConfiguration,
      @NonNull MediationAdLoadCallback<MediationRewardedAd, MediationRewardedAdCallback>
              mediationAdLoadCallback) {
    this.mediationRewardedAdConfiguration = mediationRewardedAdConfiguration;
    this.mediationAdLoadCallback = mediationAdLoadCallback;
  }

  /** Loads the rewarded ad from the third-party ad network. */
  public void loadAd() {
    // All custom events have a server parameter named "parameter" that returns
    // back the parameter entered into the AdMob UI when defining the custom event.
    Log.i("RewardedCustomEvent", "Begin loading rewarded ad.");
    String serverParameter = mediationRewardedAdConfiguration
        .getServerParameters()
        .getString(MediationConfiguration
        .CUSTOM_EVENT_SERVER_PARAMETER_FIELD);
    Log.d("RewardedCustomEvent", "Received server parameter.");
    SampleAdRequest request = createSampleRequest(mediationRewardedAdConfiguration);
    sampleRewardedAd = new SampleRewardedAd(serverParameter);
    sampleRewardedAd.setListener(this);
    Log.i("RewardedCustomEvent", "Start fetching rewarded ad.");
    sampleRewardedAd.loadAd(request);
  }

  public SampleAdRequest createSampleRequest(
      MediationAdConfiguration mediationAdConfiguration) {
    SampleAdRequest request = new SampleAdRequest();
    request.setTestMode(mediationAdConfiguration.isTestRequest());
    request.setKeywords(mediationAdConfiguration.getMediationExtras().keySet());
    return request;
  }
}

視廣告是否成功擷取或發生錯誤而定，您需要呼叫 onSuccess() 或 onFailure()。藉由傳入實作 MediationRewardedAd 的類別執行個體來呼叫 onSuccess()。

一般來說，這些方法是在轉接程式實作的第三方 SDK 回呼內實作。在這個範例中，範例 SDK 的 SampleAdListener 含有相關回呼：

@Override
public void onRewardedAdLoaded() {
  rewardedAdCallback = mediationAdLoadCallback.onSuccess(this);
}

@Override
public void onRewardedAdFailedToLoad(SampleErrorCode errorCode) {
    mediationAdLoadCallback.onFailure(SampleCustomEventError.createSampleSdkError(errorCode));
}

MediationRewardedAd 需要導入 showAd() 方法來顯示廣告：

@Override
public void showAd(Context context) {
  if (!(context instanceof Activity)) {
    rewardedAdCallback.onAdFailedToShow(
        SampleCustomEventError.createCustomEventNoActivityContextError());
    return;
  }
  Activity activity = (Activity) context;

  if (!sampleRewardedAd.isAdAvailable()) {
    rewardedAdCallback.onAdFailedToShow(
        SampleCustomEventError.createCustomEventAdNotAvailableError());
    return;
  }
  sampleRewardedAd.showAd(activity);
}

將中介服務事件轉送至 Google Mobile Ads SDK

呼叫 onSuccess() 後，轉接程式即可使用傳回的 MediationRewardedAdCallback 物件，將顯示事件從第三方 SDK 轉送至 Google Mobile Ads SDK。SampleRewardedCustomEventLoader 類別會擴充 SampleAdListener 介面，將範例廣告聯播網的回呼轉送至 Google Mobile Ads SDK。

您的自訂事件必須盡可能轉送這些回呼，才能讓應用程式從 Google Mobile Ads SDK 接收這些對等事件。以下是回呼的使用範例：

@Override
public void onAdRewarded(final String rewardType, final int amount) {
  RewardItem rewardItem =
      new RewardItem() {
        @Override
        public String getType() {
          return rewardType;
        }

        @Override
        public int getAmount() {
          return amount;
        }
      };
  rewardedAdCallback.onUserEarnedReward(rewardItem);
}

@Override
public void onAdClicked() {
  rewardedAdCallback.reportAdClicked();
}

@Override
public void onAdFullScreen() {
  rewardedAdCallback.onAdOpened();
  rewardedAdCallback.onVideoStart();
  rewardedAdCallback.reportAdImpression();
}

@Override
public void onAdClosed() {
  rewardedAdCallback.onAdClosed();
}

@Override
public void onAdCompleted() {
  rewardedAdCallback.onVideoComplete();
}

這樣即可完成獎勵廣告的自訂事件實作。GitHub 提供完整範例。您可以將此代碼與系統支援的廣告聯播網搭配使用，或是進行修改以顯示自訂事件獎勵廣告。