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插页式激励广告（Beta 版）

插页式激励广告是一种一种激励性广告格式，可让您为每次广告展示提供奖励自动应用。与激励广告不同，用户无需自行选择即可观看插页式激励广告。

前提条件

完成入门指南。

始终使用测试广告进行测试

以下示例代码包含一个广告单元 ID，可用于请求测试广告。该测试广告单元已经过专门配置会返回测试广告制作出来的广告，确保安全使用。

不过，当您在 AdMob 网页界面并创建您自己的广告单元要在您的应用中使用的 ID，请明确将设备配置为测试设备开发。

Android

ca-app-pub-3940256099942544/5354046379

iOS

ca-app-pub-3940256099942544/6978759866

初始化移动广告 SDK

加载广告之前，请先调用 MobileAds.Initialize()，以便让应用初始化移动广告 SDK。此操作仅需执行一次，最好是在应用启动时执行。

using GoogleMobileAds;
using GoogleMobileAds.Api;

public class GoogleMobileAdsDemoScript : MonoBehaviour
{
    public void Start()
    {
        // Initialize the Google Mobile Ads SDK.
        MobileAds.Initialize((InitializationStatus initStatus) =>
        {
            // This callback is called once the MobileAds SDK is initialized.
        });
    }
}

如果您使用的是中介功能，请等到回调发生后再加载广告，因为这可确保初始化所有的中介适配器。

实现

植入插页式激励广告的主要步骤如下所示：

加载插页式激励广告
[可选] 验证服务器端验证 (SSV) 回调
通过奖励回调展示插页式激励广告
监听插页式激励广告事件
清理插页式激励广告
预加载下一个插页式激励广告

加载插页式激励广告

插页式激励广告的加载是通过对 RewardedInterstitialAd 类使用静态 Load() 方法完成的。该加载方法需要使用广告单元 ID、AdRequest 对象，以及在广告加载成功或失败时调用的完成处理程序。已加载的 RewardedInterstitialAd 对象会以完成处理程序中的参数的形式提供。以下示例展示了如何加载 RewardedInterstitialAd。


  // These ad units are configured to always serve test ads.
#if UNITY_ANDROID
  private string _adUnitId = "ca-app-pub-3940256099942544/5354046379";
#elif UNITY_IPHONE
  private string _adUnitId = "ca-app-pub-3940256099942544/6978759866";
#else
  private string _adUnitId = "unused";
#endif

  private RewardedInterstitialAd _rewardedInterstitialAd;

  /// <summary>
  /// Loads the rewarded interstitial ad.
  /// </summary>
  public void LoadRewardedInterstitialAd()
  {
      // Clean up the old ad before loading a new one.
      if (_rewardedInterstitialAd != null)
      {
            _rewardedInterstitialAd.Destroy();
            _rewardedInterstitialAd = null;
      }

      Debug.Log("Loading the rewarded interstitial ad.");

      // create our request used to load the ad.
      var adRequest = new AdRequest();
      adRequest.Keywords.Add("unity-admob-sample");

      // send the request to load the ad.
      RewardedInterstitialAd.Load(_adUnitId, adRequest,
          (RewardedInterstitialAd ad, LoadAdError error) =>
          {
              // if error is not null, the load request failed.
              if (error != null || ad == null)
              {
                  Debug.LogError("rewarded interstitial ad failed to load an ad " +
                                 "with error : " + error);
                  return;
              }

              Debug.Log("Rewarded interstitial ad loaded with response : "
                        + ad.GetResponseInfo());

              _rewardedInterstitialAd = ad;
          });
  }

[可选] 验证服务器端验证 (SSV) 回调

在服务器端验证中需要额外数据的应用回调应使用插页式激励广告的自定义数据功能。在激励广告对象上设置的任何字符串值都将传递给 SSV 回调的 custom_data 查询参数。如果未设置自定义数据值， custom_data 查询参数值将不会包含在 SSV 回调中。

以下代码示例演示了如何在插页式激励广告加载完毕。

// send the request to load the ad.
RewardedInterstitialAd.Load(_adUnitId,
                            adRequest,
                            (RewardedInterstitialAd ad, LoadAdError error) =>
    {
        // If the operation failed, an error is returned.
        if (error != null || ad == null)
        {
            Debug.LogError("Rewarded interstitial ad failed to load an ad " +
                           " with error : " + error);
            return;
        }

        // If the operation completed successfully, no error is returned.
        Debug.Log("Rewarded interstitial ad loaded with response : " +
                   ad.GetResponseInfo());
        
        // Create and pass the SSV options to the rewarded ad.
        var options = new ServerSideVerificationOptions
                              .Builder()
                              .SetCustomData("SAMPLE_CUSTOM_DATA_STRING")
                              .Build()
        ad.SetServerSideVerificationOptions(options);
        
});

如果您要设置自定义奖励字符串，则必须在展示广告之前设置。

通过奖励回调展示插页式激励广告

展示广告时，您必须提供一个回调来处理奖励用户。每次加载时，广告仅可展示一次。使用 CanShowAd() 方法确认广告已做好展示准备。

以下代码演示了展示插页式激励广告的最佳方法。

public void ShowRewardedInterstitialAd()
{
    const string rewardMsg =
        "Rewarded interstitial ad rewarded the user. Type: {0}, amount: {1}.";

    if (rewardedInterstitialAd != null && rewardedInterstitialAd.CanShowAd())
    {
        rewardedInterstitialAd.Show((Reward reward) =>
        {
            // TODO: Reward the user.
            Debug.Log(String.Format(rewardMsg, reward.Type, reward.Amount));
        });
    }
}

监听插页式激励广告事件

若要进一步自定义您广告的行为，您可以在广告生命周期内加入许多事件。通过注册代理来监听这些事件如下所示。

private void RegisterEventHandlers(RewardedInterstitialAd ad)
{
    // Raised when the ad is estimated to have earned money.
    ad.OnAdPaid += (AdValue adValue) =>
    {
        Debug.Log(String.Format("Rewarded interstitial ad paid {0} {1}.",
            adValue.Value,
            adValue.CurrencyCode));
    };
    // Raised when an impression is recorded for an ad.
    ad.OnAdImpressionRecorded += () =>
    {
        Debug.Log("Rewarded interstitial ad recorded an impression.");
    };
    // Raised when a click is recorded for an ad.
    ad.OnAdClicked += () =>
    {
        Debug.Log("Rewarded interstitial ad was clicked.");
    };
    // Raised when an ad opened full screen content.
    ad.OnAdFullScreenContentOpened += () =>
    {
        Debug.Log("Rewarded interstitial ad full screen content opened.");
    };
    // Raised when the ad closed full screen content.
    ad.OnAdFullScreenContentClosed += () =>
    {
        Debug.Log("Rewarded interstitial ad full screen content closed.");
    };
    // Raised when the ad failed to open full screen content.
    ad.OnAdFullScreenContentFailed += (AdError error) =>
    {
        Debug.LogError("Rewarded interstitial ad failed to open " +
                       "full screen content with error : " + error);
    };
}

清理插页式激励广告

使用完 RewardedInterstitialAd 后，请务必调用 Destroy() 方法，然后再放弃对它的引用：

_rewardedInterstitialAd.Destroy();

这会通知插件该对象已不再使用，以及可收回。此方法调用失败将导致内存泄露。

预加载下一个插页式激励广告

RewardedInterstitialAd 是一次性对象。这意味着，在插页式激励广告展示后，该对象就无法再使用了。申请新的插页式激励广告，您需要加载新的 RewardedInterstitialAd 对象。

若要为下一次展示机会准备好插页式激励广告，请在 OnAdFullScreenContentClosed 或 OnAdFullScreenContentFailed 广告事件引发后预加载插页式激励广告。

private void RegisterReloadHandler(RewardedInterstitialAd ad)
{
    // Raised when the ad closed full screen content.
    ad.OnAdFullScreenContentClosed += ()
    {
        Debug.Log("Rewarded interstitial ad full screen content closed.");

        // Reload the ad so that we can show another as soon as possible.
        LoadRewardedInterstitialAd();
    };
    // Raised when the ad failed to open full screen content.
    ad.OnAdFullScreenContentFailed += (AdError error) =>
    {
        Debug.LogError("Rewarded interstitial ad failed to open " +
                       "full screen content with error : " + error);

        // Reload the ad so that we can show another as soon as possible.
        LoadRewardedInterstitialAd();
    };
}

其他资源

HelloWorld 示例：所有广告格式的最少植入。