RewardedAd.Show() 已弃用重载

编程问答 2022-05-23

问题描述

在我的 Android 游戏（Xamarin 应用）中，我在我的应用中实施了 Google 奖励广告：

    public class InternalRewardedAdCallback : RewardedAdCallback
    {
        .
        .
        .
    }

    RewardedAd.Show(Platform.CurrentActivity,new InternalRewardedAdCallback());

但现在已弃用，广告无法加载。查看文档，我们现在必须使用侦听器来奖励用户：

    public class InternalOnUserEarnedRewardListener : OnUserEarnedRewardListener
    {

    }

    RewardedAd.Show(Platform.CurrentActivity,new InternalOnUserEarnedRewardListener());

然而这行不通。只存在 IOnUserEarnedRewardListener 和没有 OnUserEarnedRewardListener 类。实现接口似乎不是一个合适的解决方案。有人成功更新了他们的广告代码吗？

我使用的是最新的 Xamarin.GooglePlayServices.Ads 版本 119.7.0

更新

这是尝试实现它时的样子：

private class InternalOnUserEarnedRewardListener : IOnUserEarnedRewardListener
{
    public IntPtr Handle => throw new NotImplementedException();

    public int JniIdentityHashCode => throw new NotImplementedException();

    public JniObjectReference PeerReference => throw new NotImplementedException();

    public JniPeerMembers JniPeerMembers => throw new NotImplementedException();

    public JniManagedPeerStates JniManagedPeerState => throw new NotImplementedException();

    public void dispose()
    {
        throw new NotImplementedException();
    }

    public void disposed()
    {
        throw new NotImplementedException();
    }

    public void disposeUnlessReferenced()
    {
        throw new NotImplementedException();
    }

    public void Finalized()
    {
        throw new NotImplementedException();
    }

    public void OnUserEarnedReward(IRewardItem p0)
    {
        throw new NotImplementedException();
    }

    public void SetJniIdentityHashCode(int value)
    {
        throw new NotImplementedException();
    }

    public void SetJniManagedPeerState(JniManagedPeerStates value)
    {
        throw new NotImplementedException();
    }

    public void SetPeerReference(JniObjectReference reference)
    {
        throw new NotImplementedException();
    }

    public void UnregisterFromruntime()
    {
        throw new NotImplementedException();
    }
}

解决方法

您可以创建一个继承 Java.Lang.Object 并实现 IOnUserEarnedRewardListener 接口的类：

public class CustomOnUserEarnedRewardListener : Java.Lang.Object,IOnUserEarnedRewardListener
{
    public event EventHandler OnRewarded;

    public void OnUserEarnedReward(IRewardItem rewardItem)
    {
        OnRewarded?.Invoke(this,EventArgs.Empty);
    }
}

然后显示 RewardedAd：

var rewardListener = new CustomOnUserEarnedRewardListener();
rewardListener.OnRewarded += (s,e) =>
{
    //Handle the reward
}

_rewardedAd.Show(_currentActivity,rewardListener);

注意：Google 移动广告 SDK 19.7.0 引入了许多新 API，弃用了许多类和 API，并重命名了许多类，为 20.0.0 版做准备。因此，Xamarin.GooglePlayServices.Ads 版本 119.7.0 并非 100% 稳定。

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