尝试在 xamarin 表单中使用 admob 时得到 'MediationRewardedVideoAdListenerImplementor is not abstract and does not override abstract method'

Question

MediationRewardedVideoAdListenerImplementor is not abstract and does not override abstract method zzc(Bundle) in MediationRewardedVideoAdListener public class MediationRewardedVideoAdListenerImplementor SocialFeedTest.Android C:\Users\blain\source\repos\SocialFeedTest\SocialFeedTest\SocialFeedTest.Android\obj\Debug\android\src\mono\com\google\android\gms\ads\reward\mediation\MediationRewardedVideoAdListenerImplementor.java 4

在此处学习本教程 https://xamarinhelp.com/admob-xamarin-forms-display-google-ads-mobile-app/。这对我来说很难诊断，因为它不会中断我代码中的行号，它说错误出在我不理解的自动生成代码中。它也没有说我的代码有错误，但它不会让我构建或模拟它。

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);
    }
  }
}

android

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

如果您使用的是该版本，则会出现编译警告，因为它未针对 google 中广告中的 SDK 更改进行更新。你的清单现在应该有这个。

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

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

您可以查看此 link 了解如何操作。

尝试在 xamarin 表单中使用 admob 时得到 'MediationRewardedVideoAdListenerImplementor is not abstract and does not override abstract method'

getting 'MediationRewardedVideoAdListenerImplementor is not abstract and does not override abstract method' when trying to use admob in xamarin forms

c#

android

admob

ios

xamarin.forms