Linker Exception in "Release" Android build about xfx.controls

[gregersen79]

Have the same issue.

Xamarin Forms: 3.6.0.344457
Xfx.Controls: 1.2.1
Android libraries: 28.0.0.1

Error:
The "LinkAssemblies" task failed unexpectedly.
Mono.Linker.MarkException: Error processing method: 'System.Void Xfx.Controls.Droid.Renderers.XfxCardViewRendererDroid::Xamarin.Forms.Platform.Android.IVisualElementRenderer.add_LayoutChange(System.EventHandler1<Android.Views.View/LayoutChangeEventArgs>)' in assembly: 'Xfx.Controls.Droid.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Void Xamarin.Forms.Platform.Android.IVisualElementRenderer::add_LayoutChange(System.EventHandler1<Android.Views.View/LayoutChangeEventArgs>)
at Mono.Linker.Steps.MarkStep.HandleUnresolvedMethod(MethodReference reference)
at Mono.Linker.Steps.MarkStep.MarkMethod(MethodReference reference)
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 MonoDroid.Tuner.MonoDroidMarkStep.Process(LinkContext context)
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() Project.Forms.Android

[ChaseFlorell]

That's a new class in 1.1.3.
Just to confirm, have you called the Init() method in your Android Main Activity?
https://github.com/XamFormsExtended/Xfx.Controls/blob/master/example/Xfx.Controls.Example.Droid/MainActivity.cs#L14

[mrbelk]

Yes, but it's the compilation process that fails; not the actual app running. We don't get that far.

[ChaseFlorell]

did you try a full clean/rebuild in RELEASE? I wonder if there's a dll mismatch after the update?

[mrbelk]

yes I did.

[ChaseFlorell]

so if the issue is at compile time, then it's not the Linker. What happens is that the linker strips classes during compile time so that at runtime they're no longer there (ie: linker issues will cause runtime crashes). I'm leaning more to a dll mismatch.

Make sure you've done the following.
Clean > Close Visual Studio > delete all obj + bin directories > Open Visual Studio > Rebuild

I'm trying to reproduce, but cannot.

[ChaseFlorell]

Alternatively, if you can send me a repro, I'll take a look.

[mrbelk]

give me a bit to completely clean the solution as well as deleting the contents of the "packages" folder in case the dll mismatch is coming from nuget.

[mrbelk]

does 1.1.3 require xamarin forms 2.5, by any chance?

[mrbelk]

I've cleaned everything out and still get the linker error. Could it be something with the target android framework version?

[mrbelk]

all my xamarin.android.support.* packages are v26.1.0.1.

[ChaseFlorell]

I wonder if it makes a difference what the support packages are? Here's what I'm using.

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Xamarin.Android.Support.Animated.Vector.Drawable" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Annotations" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Compat" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Core.UI" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Core.Utils" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Design" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Fragment" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Media.Compat" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Transition" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.v4" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.v7.AppCompat" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.v7.CardView" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.v7.MediaRouter" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.v7.Palette" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.v7.RecyclerView" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Android.Support.Vector.Drawable" version="25.4.0.2" targetFramework="monoandroid80" />
  <package id="Xamarin.Forms" version="2.5.0.121934" targetFramework="monoandroid71" />
</packages>

[mrbelk]

hmmm... let me see if I can downgrade my support libraries and target framework and see what that does

[toverux]

Getting the same problem... How can I help you to find the issue?

Edit : updated to v.26 but now it's failing on Baseflow/XamarinMediaManager#278, I don't get the XFX's error anymore, but I don't know if it's just not displayed because XamarinMediaManager fails first. Disabling the linker for now :/ ...

[kwacks]

Also have this problem with linking.
Our only alternative right now is using a native implementation for android.
Why doesn't linkskip work for this plugin?

[ChaseFlorell]

Anyone running into this, please post your stacktrace.

/cc @kwacks @toverux

[hemantramu]

We are using the XfxControls package in a Xamarin.Forms app (Droid and iOS). The Xamarin Forms version is 3.6.0.293080. When we try to compile our primary Droid platform project, we get a build error that the "LinkAssemblies task failed unexpectedly." The actual build error is quoted below. When we build the project in "Debug" mode, it works fine. If we select "Don't Link" in the Linker Behavior section of the Droid project options in the Release configuration, the build completes.

Version Number of Control: 1.1.3 / 1.2.1
Device Tested On: Debug Working
Simulator Tested On: N/A
Affects
iOS - Not Tested Yet
Android (Min version API19, target version API28, Xamarin Android version 9, SDK Tools version 26.1.1, SDK Platform Tools version 28.0.1, SDK Build Tools version 27.0.3)
Expected Behavior
Project compiles without any linker errors

Actual Behavior
Droid project compilation fails with linker exception like this:

\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: The "LinkAssemblies" task failed unexpectedly.
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: Mono.Linker.MarkException: Error processing method: 'System.Void Xfx.Controls.Droid.Renderers.XfxCardViewRendererDroid::Xamarin.Forms.Platform.Android.IVisualElementRenderer.add_LayoutChange(System.EventHandler1<Android.Views.View/LayoutChangeEventArgs>)' in assembly: 'Xfx.Controls.Droid.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Void Xamarin.Forms.Platform.Android.IVisualElementRenderer::add_LayoutChange(System.EventHandler1<Android.Views.View/LayoutChangeEventArgs>)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.HandleUnresolvedMethod(MethodReference reference)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.MarkMethod(MethodReference reference)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.ProcessMethod(MethodDefinition method)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.ProcessQueue()
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: --- End of inner exception stack trace ---
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.ProcessQueue()
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.ProcessPrimaryQueue()
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Steps.MarkStep.Process()
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at MonoDroid.Tuner.MonoDroidMarkStep.Process(LinkContext context)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Mono.Linker.Pipeline.Process(LinkContext context)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at MonoDroid.Tuner.Linker.Process(LinkerOptions options, ILogger logger, LinkContext& context)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Xamarin.Android.Tasks.LinkAssemblies.Execute(DirectoryAssemblyResolver res)
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Xamarin.Android.Tasks.LinkAssemblies.Execute()
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2129,5): error MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.d__26.MoveNext()

[dlebee]

any news? I have the same issue as @hemantramu

[MRomeror]

I have the same issue as @hemantramu Any news? Thanks

[ChaseFlorell]

No news yet, would love a repro that I can run to see.

[ChaseFlorell]

would anyone be willing to test a fix for me?

[GeorgeSpring]

Hello! Getting the same problem...

[hcd00045]

would anyone be willing to test a fix for me?

I would. Just let me know how. Thanks.

Edit: I should say that i saw your PR and figure that was the fix, and I'm happy to test whatever, just need some guidance as to the best way to build and integrate it into my project.

[MRomeror]

would anyone be willing to test a fix for me?

Hi,
I have created a solution with the latest versions of Xamarin and xfx.Control.
It keeps giving error when compiling in release. I attached the project link.
https://drive.google.com/file/d/1Z9f0moaU_qkGM1RKlbtzG1oIwEuw-PcY/view?usp=sharing

[thefenry]

Any update on this? Seems like many have been having the same issue for a while.

[ArthurConceicao]

Same issue, haven't found a solution yet

[Adlorem]

With newer version of Xamarin there is and issue between system drawing color and xamarin forms color. Only solution is to download source upgrade packages, fix this issue and reference dll locally to your project.

[rubberydev]

Hi everyone.

I have the same issue:

C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: Mono.Linker.MarkException: Error processing method: 'System.Void Xfx.Controls.Droid.Renderers.XfxCardViewRendererDroid::Xamarin.Forms.Platform.Android.IVisualElementRenderer.add_LayoutChange(System.EventHandler1<Android.Views.View/LayoutChangeEventArgs>)' in assembly: 'Xfx.Controls.Droid.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Void Xamarin.Forms.Platform.Android.IVisualElementRenderer::add_LayoutChange(System.EventHandler1<Android.Views.View/LayoutChangeEventArgs>)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.HandleUnresolvedMethod(MethodReference reference)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.MarkMethod(MethodReference reference)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.ProcessMethod(MethodDefinition method)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.ProcessQueue()
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: --- End of inner exception stack trace ---
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.ProcessQueue()
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.ProcessPrimaryQueue()
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.Process()
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Steps.MarkStep.Process(LinkContext context)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at MonoDroid.Tuner.MonoDroidMarkStep.Process(LinkContext context)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Pipeline.ProcessStep(LinkContext context, IStep step)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Mono.Linker.Pipeline.Process(LinkContext context)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at MonoDroid.Tuner.Linker.Process(LinkerOptions options, ILogger logger, LinkContext& context)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Xamarin.Android.Tasks.LinkAssemblies.Execute(DirectoryAssemblyResolver res)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Xamarin.Android.Tasks.LinkAssemblies.RunTask()
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2056,5): error XALNK7000: at Xamarin.Android.Tasks.AndroidTask.Execute()

Someone has found any solution ?

[ShivamSingh1]

Install 1.0.4 version and then remove bin/obj and then rebuild. It's work for me

[arunrajrgithub]

Thank you ShivamSingh1. It worked. Thank you so much.