Csharp 错误：无法激活 JNI Handle Xamarin 中的 WorkManager 实现

我一直在try 使用Xamarin在.NET中实现WorkManager(https://developer.android.com/topic/libraries/architecture/workmanager/)(将旧代码移植到我们使用JobScheduler的地方).在启动应用程序时，我收到"错误:无法激活类型为MyWorker1的JNI句柄"，并且似乎找不到为什么我的实现被 destruct 了.

我的基本实现:

using Android.App;
using Android.Content;
using AndroidX.Work;
using System;
using MyTooling.Services;
using MyTooling.ViewModels.Base;

namespace MyTooling.Droid.Workers
{
    public abstract class BackgroundWorkerBase : Worker
    {
        protected MyService1 MyService;

        protected WorkerParameters WorkerParameters { get; }

        protected BackgroundWorkerBase(Context context, WorkerParameters workerParameters) : base(context, workerParameters)
        {
            if (!Xamarin.Forms.Forms.IsInitialized)
                Xamarin.Forms.Forms.Init(Application.Context, null);
            if (!ViewModelLocator.IsRegistered)
                ViewModelLocator.RegisterDependencies(Helpers.Settings.UseMocks);
            MyService = ViewModelLocator.Resolve<MyService1>();
            WorkerParameters = workerParameters;
               
        }
        public override Result DoWork()
        {
            try
            {
                var success = TryBackgroundWork();
                if (!success || AnyWorkLeft())
                    return Result.InvokeRetry();
                else
                    return Result.InvokeSuccess();
            }
            catch (Exception ex)
            {
                Log.LogError(ex);
                return Result.InvokeFailure();
            }
        }

        protected abstract bool AnyWorkLeft();
        protected abstract bool TryBackgroundWork();
    }
}

JNI错误所指的类:

using Android.Content;
using AndroidX.Work;

namespace MyTooling.Droid.Workers
{
    public class MyWorker1: BackgroundWorkerBase
    {
        public MyWorker1(Context context, WorkerParameters workerParameters) : base(context, workerParameters)
        {
        }

        protected override bool AnyWorkLeft()
        {
            return MyService.AnyWork1Left();
        }

        protected override bool TryBackgroundWork()
        {
            return MyService.TryDoWork1();
        }

    }
}