c#Xamarin抛出Java。Lang.ClassNotFoundException使用CallRedirectionService

Question

我创建了一个新的移动应用程序Xamarin。使用此示例的空白模板来生成项目。我试图在我的应用程序中使用CallRedirectionService，但引发了以下异常

Java.Lang.ClassNotFoundException: crc64bf934172c93e128d.MyCallService ---> Java.Lang.NoClassDefFoundError: Failed resolution of: L安卓/telecom/CallRedirectionService; ---> Java.Lang.ClassNotFoundException: Didn't find class "安卓.telecom.CallRedirectionService" on path: DexPathList[[zip file "/data/app/com.companyname.xam-8bL_MB0IWItrj3Z69Zwvtw==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.xam-8bL_MB0IWItrj3Z69Zwvtw==/lib/x86, /data/app/com.companyname.xam-8bL_MB0IWItrj3Z69Zwvtw==/base.apk!/lib/x86, /system/lib]]

using Android.Telecom;
using Xamarin.Forms;    
namespace xam
    {
        public class MyCallService : CallRedirectionService
        {
            public override void OnPlaceCall(Android.Net.Uri handle, PhoneAccountHandle initialPhoneAccount, bool allowInteractiveResponse)
            {
                //throw new NotImplementedException();
            }
        }
        public partial class MainPage : ContentPage
        {
            public MainPage()
            {
                var callCervice = new MyCallService();
                InitializeComponent();
            }
        }
    }

既然其他服务不抛出任何异常，我该如何解决它

例如

public class CallPreventer : InCallService
{
    public override void OnCallAdded(Call call)
    {
        call.Disconnect();
        base.OnCallAdded(call);
    }
}

Android options

Exception

Answer 1

从屏幕截图上看，这段代码似乎是。NET标准组件（共享项目），它不会引用Mono Android。相反，尝试使用Xamarin Forms Dependency Service从共享代码中调用特定于平台的东西。见my recreation of your code here