Xamarin服务和表单初始化

Question

I'm writing a Xamarin Android application that consists of service and a page for configuration. The service starts after device boot (launched by a BroadcastReceiver ) and needs a database connection to read the configuration. I receive an error when the service tries to read the database:

You MUST call Xamarin.Forms.Init(); prior to using it.

For the database connection, I'm using SQLite.Net . I know that I need to call the Xamarin.Forms.Init() to use the database, but I don't know how I can do it. The Init() method needs context and Android.OS.Bundle as inputs, but in the BroadcastReceiver class, I have only the context. How I can retrieve the bundle? Is there another way to do that?

This is the exception stacktrace:

 at Xamarin.Forms.Device.get_PlatformServices () at Xamarin.Forms.Device.GetAssemblies () at Xamarin.Forms.DependencyService.Initialize () at Xamarin.Forms.DependencyService.Get[T] (Xamarin.Forms.DependencyFetchTarget fetchTarget) at MyProject.Database.ConfigurationDBService..ctor () at MyProject.Utils.ConfigurationUtils.getConfig () at MyProject.InvoiceUploadService.OnStartCommand (Android.Content.Intent intent, Android.App.StartCommandFlags flags,System.Int32 startId) 

Answer 1

如问题注释中的SushiHangover所建议的，我通过在没有DependecyService的情况下运行数据库连接来解决了该问题。

Answer 2

Put:

Xamarin.Forms.Init();

In your MainActivity.cs class in Android Project.