橫幅廣告自訂事件

必要條件

完成自訂事件設定。

請求橫幅廣告

當刊登序列中介服務鏈執行到自訂事件委刊項，系統會以您在建立自訂事件時指定的類別名稱，呼叫 loadBannerAd() 方法。在本例中，該方法位於 SampleCustomEvent，會接著呼叫 SampleBannerCustomEventLoader 中的 loadBannerAd() 方法。

如要請求橫幅廣告，請建立或修改 Adapter 的延伸類別，以導入 loadBannerAd()。此外，請建立新類別來導入 MediationBannerAd。

在我們的自訂事件範例中，SampleCustomEvent 延伸自 Adapter 類別，並委派給 SampleBannerCustomEventLoader。

Java

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

import com.google.android.gms.ads.mediation.Adapter;
import com.google.android.gms.ads.mediation.MediationAdConfiguration;
import com.google.android.gms.ads.mediation.MediationAdLoadCallback;
import com.google.android.gms.ads.mediation.MediationBannerAd;
import com.google.android.gms.ads.mediation.MediationBannerAdCallback;
...

public class SampleCustomEvent extends Adapter {
  private SampleBannerCustomEventLoader bannerLoader;
  @Override
  public void loadBannerAd(
      @NonNull MediationBannerAdConfiguration adConfiguration,
      @NonNull MediationAdLoadCallback<MediationBannerAd, MediationBannerAdCallback> callback) {
    bannerLoader = new SampleBannerCustomEventLoader(adConfiguration, callback);
    bannerLoader.loadAd();
  }
}

SampleBannerCustomEventLoader 負責處理以下工作：

• 載入橫幅廣告，並於載入完畢時叫用 MediationAdLoadCallback 方法。

• 導入 MediationBannerAd 介面。

• 接收廣告事件回呼，並回報給 Google Mobile Ads SDK。

在 使用者介面中定義的選用參數會包含在廣告設定，使用 adConfiguration.getServerParameters().getString(MediationConfiguration.CUSTOM_EVENT_SERVER_PARAMETER_FIELD) 即可存取。這項參數通常是廣告單元 ID，廣告聯播網 SDK 在例項化廣告物件時會用到。

Java

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

import com.google.android.gms.ads.mediation.Adapter;
import com.google.android.gms.ads.mediation.MediationBannerAdConfiguration;
import com.google.android.gms.ads.mediation.MediationAdLoadCallback;
import com.google.android.gms.ads.mediation.MediationBannerAd;
import com.google.android.gms.ads.mediation.MediationBannerAdCallback;
...

public class SampleBannerCustomEventLoader extends SampleAdListener implements MediationBannerAd {

  /** View to contain the sample banner ad. */
  private SampleAdView sampleAdView;

  /** Configuration for requesting the banner ad from the third-party network. */
  private final MediationBannerAdConfiguration mediationBannerAdConfiguration;

  /** Callback that fires on loading success or failure. */
  private final MediationAdLoadCallback<MediationBannerAd, MediationBannerAdCallback>
      mediationAdLoadCallback;

  /** Callback for banner ad events. */
  private MediationBannerAdCallback bannerAdCallback;

  /** Constructor. */
  public SampleBannerCustomEventLoader(
      @NonNull MediationBannerAdConfiguration mediationBannerAdConfiguration,
      @NonNull MediationAdLoadCallback<MediationBannerAd, MediationBannerAdCallback>
              mediationAdLoadCallback) {
    this.mediationBannerAdConfiguration = mediationBannerAdConfiguration;
    this.mediationAdLoadCallback = mediationAdLoadCallback;
  }

  /** Loads a banner 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 UI when defining the custom event.
    Log.i("BannerCustomEvent", "Begin loading banner ad.");
    String serverParameter =
        mediationBannerAdConfiguration.getServerParameters().getString(
        MediationConfiguration.CUSTOM_EVENT_SERVER_PARAMETER_FIELD);

    Log.d("BannerCustomEvent", "Received server parameter.");

    Context context = mediationBannerAdConfiguration.getContext();
    sampleAdView = new SampleAdView(context);

    // Assumes that the serverParameter is the ad unit of the Sample Network.
    sampleAdView.setAdUnit(serverParameter);
    AdSize size = mediationBannerAdConfiguration.getAdSize();

    // Internally, smart banners use constants to represent their ad size, which
    // means a call to AdSize.getHeight could return a negative value. You can
    // accommodate this by using AdSize.getHeightInPixels and
    // AdSize.getWidthInPixels instead, and then adjusting to match the device's
    // display metrics.
    int widthInPixels = size.getWidthInPixels(context);
    int heightInPixels = size.getHeightInPixels(context);
    DisplayMetrics displayMetrics = Resources.getSystem().getDisplayMetrics();
    int widthInDp = Math.round(widthInPixels / displayMetrics.density);
    int heightInDp = Math.round(heightInPixels / displayMetrics.density);

    sampleAdView.setSize(new SampleAdSize(widthInDp, heightInDp));
    sampleAdView.setAdListener(this);

    SampleAdRequest request = createSampleRequest(mediationBannerAdConfiguration);
    Log.i("BannerCustomEvent", "Start fetching banner ad.");
    sampleAdView.fetchAd(request);
  }

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

視廣告成功擷取或發生錯誤而定。您可能要呼叫 onSuccess() 或 onFailure()。傳遞導入 MediationBannerAd 的類別執行個體，即可呼叫 onSuccess()。

這些方法通常是在轉接程式導入的第三方 SDK 回呼中執行。以本例來說，範例 SDK 的 SampleAdListener 含有相關回呼：

Java

@Override
public void onAdFetchSucceeded() {
  bannerAdCallback = mediationAdLoadCallback.onSuccess(this);
}

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

MediationBannerAd 須導入 View getter 方法：

Java

@Override
@NonNull
public View getView() {
  return sampleAdView;
}

將中介服務事件轉送至 Google Mobile Ads SDK

呼叫 onSuccess() 後，轉接程式可使用傳回的 MediationBannerAdCallback 物件，將呈現事件從第三方 SDK 轉送至 Google Mobile Ads SDK。SampleBannerCustomEventLoader 類別會擴充 SampleAdListener 介面，將回呼從範例廣告聯播網轉送至 Google Mobile Ads SDK。

自訂事件應盡量將這些回呼轉送至 Google Mobile Ads SDK，這樣應用程式才能收到相應的事件通知。以下是回呼使用範例：

Java

@Override
public void onAdFullScreen() {
  bannerAdCallback.onAdOpened();
  bannerAdCallback.reportAdClicked();
}

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

到這裡就完成橫幅廣告的自訂事件導入設定！GitHub 上有完整的範例可參考。範例可直接用於支援的廣告聯播網，您也可修改現有範例，顯示自訂事件橫幅廣告。