In Xamarin.Android need use Activity by call from Xamarin.Forms using DependencyService

Question

I implement by manual https://developers.google.com/pay/api/android/guides/tutorial in Xamarin.Forms + Xamarin.Android. I call in Xamarin.Forms:

DependencyService.Get<IPay>().Pay();

In Xamarin.Android i implement

public class Pay_Droid : IPay
{

public void Pay()
{
...
AutoResolveHelper.ResolveTask(
                paymentsClient.LoadPaymentData(request),
                this,
                LOAD_PAYMENT_DATA_REQUEST_CODE);
...
}

}

but have problem in "this" - need use activity. How to implement?

Answer 1

Firstly, you can create public static MainActivity in MainActivity class, then assign current MainActivity to macvivity in MainActivity OnCreate() method:

public static MainActivity macvivity;
    protected override void OnCreate(Bundle savedInstanceState)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;

        base.OnCreate(savedInstanceState);


        macvivity = this;

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

Finally, you can activity by MainActivity.macvivity

public void Pay()
{
...
AutoResolveHelper.ResolveTask(
            paymentsClient.LoadPaymentData(request),
            MainActivity.macvivity,
            LOAD_PAYMENT_DATA_REQUEST_CODE);
...
}