c# - The type or namespace name 'TaskStackBuilder' does not exist in the namespace 'Android.Support.V4.App' (are you missing an assembly reference?)

Question

I updated Xamarin.Forms from 4.8 to 5.0 . Also for Xamarin.Forms 5.0 u need to have min Android 10 Target Framework, so i updated from Android 9.0 to Android 10.0. With this Update i need to change Android.Support to AndroidX. But on this code i get error i don't know how to fix:

   var stackBuilder =    Android.Support.V4.App.TaskStackBuilder.Create(Application.Context);
                stackBuilder.AddNextIntent(resultIntent);

Any suggestion?

error:

The type or namespace name 'TaskStackBuilder' does not exist in the namespace 'Android.Support.V4.App' (are you missing an assembly reference?)

Answer 1

The type or namespace name 'TaskStackBuilder' does not exist in the namespace 'Android.Support.V4.App'

This is because the Android.Support.V4.App library doesn't work in Android 10. You've set the TargetFramework to Android 10 in the project, please use Android.App.TaskStackBuilder or AndroidX.Core.App.TaskStackBuilder api instead.

//var stackBuilder = Android.App.TaskStackBuilder.Create(Android.App.Application.Context);
var stackBuilder = AndroidX.Core.App.TaskStackBuilder.Create(Android.App.Application.Context);

stackBuilder.AddNextIntent(resultIntent);

Check the doc: https://developer.android.com/topic/libraries/support-library/packages