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Hi guys how i can create a tabbedpage with border radius like this image

Severity Code Description Project File Line Suppression State Suppression State
Error MSB4018: The "LinkAssemblies" task failed unexpectedly.
Mono.Linker.MarkException: Error processing method: 'System.Void ChallengeApp.Core.Services.AppServices.ImagePickerService/d__1::MoveNext()' in assembly: 'ChallengeApp.Core.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Threading.Tasks.Task`1<Plugin.Media.Abstractions.MediaFile> Plugin.Media.Abstractions.IMedia::PickPhotoAsync(Plugin.Media.Abstractions.PickMediaOptions,System.Threading.CancellationToken)
at Mono.Linker.Steps.MarkStep.HandleUnresolvedMethod(MethodReference reference)
at Mono.Linker.Steps.MarkStep.MarkMethod(MethodReference reference)
at Mono.Linker.Steps.MarkStep.MarkInstruction(Instruction instruction)
at Mono.Linker.Steps.MarkStep.MarkMethodBody(MethodBody body)
at Mono.Linker.Steps.MarkStep.ProcessMethod(MethodDefinition method)
at Mono.Linker.Steps.MarkStep.ProcessQueue()
--- End of inner exception stack trace ---
at Mono.Linker.Steps.MarkStep.ProcessQueue()
at Mono.Linker.Steps.MarkStep.ProcessPrimaryQueue()
at Mono.Linker.Steps.MarkStep.Process()
at Mono.Linker.Steps.MarkStep.Process(LinkContext context)
at MonoDroid.Tuner.MonoDroidMarkStep.Process(LinkContext context)
at Mono.Linker.Pipeline.ProcessStep(LinkContext context, IStep step)
at Mono.Linker.Pipeline.Process(LinkContext context)
at MonoDroid.Tuner.Linker.Process(LinkerOptions options, ILogger logger, LinkContext& context)
at Xamarin.Android.Tasks.LinkAssemblies.Execute(DirectoryAssemblyResolver res)
at Xamarin.Android.Tasks.LinkAssemblies.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.d__26.MoveNext() 0

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Hi there

I have a Xamarin.Forms App for Android and iOS. On one of my Pages I like to add some secondary ToolbarItems for the Android version. I don't want to add them into the Toolbar of an iOS app cause the Xamarin Secondary Toolbar for iOS does not work with the new App Shell.

But with the following XAML I get a NullReferenceException in Page.cs OnToolbarItemsCollectionChanged when I navigate to the page on iOS.

<ContentPage.ToolbarItems>
    <OnPlatform x:TypeArguments="ToolbarItem">
        <On Platform="Android">
            <ToolbarItem Command="{Binding LaunchRocketCommand}" Text="Launch Rocket" Order="Secondary" Priority="3"/>
        </On>
    </OnPlatform>
</ContentPage.ToolbarItems>

Digging into Page.cs I see that the error occurs when the OnToolbarItemsCollectionChanged wants to set item.Parent but I assume item is null cause I did not specify for iOS. Can I somehow manipulate the args.Action? Is it a bug? Does anyone have an idea for a workaround?

    void OnToolbarItemsCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
    {
        if (args.Action != NotifyCollectionChangedAction.Add)
            return;
        foreach (IElement item in args.NewItems)
            item.Parent = this;
    }

Xamarin.Forms: 4.3.0.947036 (latest stable)

Cheers

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I have a problem, migrate my project code VS 2017 to VS 2019.
And I have an error in the Android Manifest of a style.

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Is there any way to create this kind of UI (Like spinner) ?
Any idea would be appreciated.
Thanks.

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