c# - 尝试在 xamarin 表单中使用 admob 时获取 'MediationRewardedVideoAdListenerImplementor is not abstract and does not override abstract method'

Question

MediationRewardedVideoAdListenerImplementor 不是抽象的，不会重写 MediationRewardedVideoAdListener 中的抽象方法 zzc(Bundle)
公共(public)类 MediationRewardedVideoAdListenerImplementor SocialFeedTest.Android C:\Users\blain\source\repos\SocialFeedTest\SocialFeedTest\SocialFeedTest.Android\obj\Debug\90\android\src\mono\com\google\android\gms\ads\reward\mediation\MediationRewardedVideoAdListenerImplementor.java 4

按照本教程进行操作 https://xamarinhelp.com/admob-xamarin-forms-display-google-ads-mobile-app/ .这对我来说很难诊断，因为它不会破坏我代码中的行号，它说错误是在我不理解的自动生成的代码中。它也没有说我的代码中有错误，但它不会让我构建它或模拟它。

这是我的代码

xamarin.forms

 using System;
 using System.Collections.Generic;
 using System.Text;
 using Xamarin.Forms;

namespace SocialFeedTest.Control
{
public class AdMobView : View
{
    public static readonly BindableProperty AdUnitIdProperty = BindableProperty.Create(
                   nameof(AdUnitId),
                   typeof(string),
                   typeof(AdMobView),
                   string.Empty);

    public string AdUnitId
    {
        get => (string)GetValue(AdUnitIdProperty);
        set => SetValue(AdUnitIdProperty, value);
    }
  }
}

安卓

渲染器

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.Gms.Ads;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using SocialFeedTest.Control;
using SocialFeedTest.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(AdMobView), typeof(AdMobViewRenderer))]

namespace SocialFeedTest.Droid
{
   public class AdMobViewRenderer : ViewRenderer<AdMobView, AdView>
{
    public AdMobViewRenderer(Context context) : base(context) { }

    protected override void OnElementChanged(ElementChangedEventArgs<AdMobView> e)
    {
        base.OnElementChanged(e);

        if (e.NewElement != null && Control == null)
            SetNativeControl(CreateAdView());
    }

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);

        if (e.PropertyName == nameof(AdView.AdUnitId))
            Control.AdUnitId = Element.AdUnitId;
    }

    private AdView CreateAdView()
    {
        var adView = new AdView(Context)
        {
            AdSize = AdSize.SmartBanner,
            AdUnitId = Element.AdUnitId
        };

        adView.LayoutParameters = new LinearLayout.LayoutParams(LayoutParams.MatchParent, LayoutParams.MatchParent);

        adView.LoadAd(new AdRequest.Builder().Build());

        return adView;
    }
    } 
}

主要 Activity

   using System;

using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace SocialFeedTest.Droid
{
    [Activity(Label = "SocialFeedTest", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges =                   ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
  public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
    protected override void OnCreate(Bundle savedInstanceState)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;

        base.OnCreate(savedInstanceState);
        Android.Gms.Ads.MobileAds.Initialize(ApplicationContext, "ca-app-pub-5184019642309342~9928782520");
        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
        LoadApplication(new App());
    }
    public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[]  grantResults)
    {
        Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

        base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
    }
  }
}

iOS

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;

using Foundation;
using Google.MobileAds;
using SocialFeedTest.Control;
using SocialFeedTest.iOS;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(AdMobView), typeof(AdMobViewRenderer))]
namespace SocialFeedTest.iOS
{

   public class AdMobViewRenderer : ViewRenderer<AdMobView, BannerView>
   {
    protected override void OnElementChanged(ElementChangedEventArgs<AdMobView> e)
    {
        base.OnElementChanged(e);
        if (Control == null)
        {
            SetNativeControl(CreateBannerView());
        }
    }

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);

        if (e.PropertyName == nameof(BannerView.AdUnitId))
            Control.AdUnitId = Element.AdUnitId;
    }

    private BannerView CreateBannerView()
    {
        var bannerView = new BannerView(AdSizeCons.SmartBannerPortrait)
        {
            AdUnitId = Element.AdUnitId,
            RootViewController = GetVisibleViewController()
        };

        bannerView.LoadRequest(GetRequest());

        Request GetRequest()
        {
            var request = Request.GetDefaultRequest();
            return request;
        }

        return bannerView;
    }

    private UIViewController GetVisibleViewController()
    {
        var windows = UIApplication.SharedApplication.Windows;
        foreach (var window in windows)
        {
            if (window.RootViewController != null)
            {
                return window.RootViewController;
            }
        }
        return null;
    }
  }

}
main

using System;
using System.Collections.Generic;
using System.Linq;

using Foundation;
using UIKit;

namespace SocialFeedTest.iOS
{
   public class Application
    {
    // This is the main entry point of the application.
    static void Main(string[] args)
    {
        // if you want to use a different Application Delegate class from "AppDelegate"
        // you can specify it here.
        UIApplication.Main(args, null, "AppDelegate");
    }
  }
}

Answer 1

如果您使用该版本，将会出现编译警告，因为它没有针对 Google 广告中的 SDK 更改进行更新。您的 list 现在应该有这个。

元数据 android:name="com.google.android.gms.ads.APPLICATION_ID"android:value="ca-app-pub-xxxxxxxxx-xxxxxxxxx"

如果您只需要广告，我建议使用 Xamarin.GooglePlayServices.Ads.Lite。

你可以看到这个link了解如何做到这一点。