CODEWITHSUNDEEP
c#xamarinxamarin.formsxamarin.androidprism
user1202032
user1202032

Reputation: 1479

Xamarin.Forms Prism: Android dependency injection of platform-specific service

Im trying to inject a Android- and iOS-specific service, but on Android I get an error in App.xaml.cs about it not being able to resolve the parameter for LoginService

My App.xaml.cs:

    protected override void RegisterTypes()
    {
        Container.RegisterTypeForNavigation<NavigationPage>();
        Container.RegisterTypeForNavigation<MainPage>();
        Container.RegisterTypeForNavigation<MapsPage>();


        Container.RegisterInstance<ILoginService>(new LoginService(Container.Resolve<IClsDkwsService>()));
    }

My MainActivity.cs:

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        TabLayoutResource = Resource.Layout.tabs;
        ToolbarResource = Resource.Layout.toolbar;

        base.OnCreate(bundle);

        global::Xamarin.Forms.Forms.Init(this, bundle);
        LoadApplication(new App(new AndroidInitializer()));
    }
}

public class AndroidInitializer : IPlatformInitializer
{
    public void RegisterTypes(IUnityContainer container)
    {
        container.RegisterInstance<IClsCryptoService>(new Cls_crypto());
        container.RegisterInstance<IClsDkwsService>(new Cls_dkws());
    }
}

It looks like AndroidInitializer.RegisterTypes() is called after App.RegisterTypes(). I would like to avoid registering LoginService in each platform. How do I ensure all platform-specific services are registered in App.xaml.cs?

Upvotes: 1

Views: 1107

Answers (1)

user5420778
user5420778

Reputation:

Instead of trying to manually create instances of these dependencies, use the features of the DI container. You can register a type as a singleton in Unity by using

Container.RegisterType<IMyService, MyService>(new ContainerControlledLifetimeManager());

Upvotes: 3

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