Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported.

[moljac]

Xamarin.Android Version (eg: 6.0):

AndroidX

Operating System & Version (eg: Mac OSX 10.11):

MacOSX builds on Azure DevOps

Support Libraries Version (eg: 23.3.0):

Describe your Issue:

Error

An error occurred when executing task 'migration-tests'.

Details

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(514,3): error XA0121: Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. [/Users/runner/runners/2.164.6/work/1/s/tests/AndroidXMigrationTests/Aarxercise.Old.Support/Aarxercise.Old.Support.csproj]
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(514,3): error XA0121: Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. [/Users/runner/runners/2.164.6/work/1/s/tests/AndroidXMigrationTests/Aarxercise.Old.Support/Aarxercise.Old.Support.csproj]
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(514,3): error XA0121: Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. [/Users/runner/runners/2.164.6/work/1/s/tests/AndroidXMigrationTests/Aarxercise.Old.Support/Aarxercise.Old.Support.csproj]

Steps to Reproduce (with link to sample solution if possible):

Include any relevant Exception Stack traces, build logs, adb logs:

[moljac]

error XA0121: Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.

Solved by bumping TargetFramework to latest.

Another solution was either to upgrade to 16.5 Preview 2 or downgrade to 16.3.

Closing.

[jordanlui]

error XA0121: Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.

Solved by bumping TargetFramework to latest.

Another solution was either to upgrade to 16.5 Preview 2 or downgrade to 16.3.

Closing.

Moljac,
Can you elaborate on the fixes?
When you say TargetFramework, would I be following your suggestion if I install:
.NET Framework 4.8 targeting pack?

Thank you,
Jordan

[xleon]

I can confirm the workaround (updating Android TargetFramework) works:

[lunjio]

The XA0121 warning from Xamarin.Android 10.1 is now an error because compatibility with the old GetAdditionalResourcesFromAssemblies MSBuild task has been removed.

Any project that uses one of the affected Xamarin.Android.Support libraries from version 26 or earlier will now see errors like:

Copy
error XA0121: Assembly 'Xamarin.Android.Support.Animated.Vector.Drawable' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.
To resolve these errors, update the project to use version 27 or higher of the Xamarin.Android.Support libraries.
Source - https://docs.microsoft.com/en-us/xamarin/android/release-notes/10/10.2

[netstar-gh]

I have updated all Xamarin.Android.Support.* to v28.0.0.3 but still now working, This issue happen after I update the VS2019 to 16.7.2

Can you guys let me know how to fix it?

[netstar-gh]

Spending half a day and still struggling, VS updated and NuGet as well but everything still failing to build

[netstar-gh]

[HUBBER12]

Me too.. mine is Xamarin.Android.Support.CustomTabs and Xamaarin.Android.Support.v4.
Have VS 16.7.7.

[HUBBER12]

So update - i had not realized i needed to start using AndroidX istead of all the Xamarin.Android.Support.

I have gotten rid of all Xamarin.Android.Support.xxxxx nuget packages...
and now I'm using all Xamarin.AndroidX.... nuget packages

however i get error messages all very close to

Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author

I have gone through each package, and I cant quite find what is referencing it so i can remove/replace.

VS 16.7.7 on PC

Additionally - I have Target Framework = 10.0 in both places referenced. Min and Target are both set to 10.

[guillermo-gerard]

I'm in the same situation as you @HUBBER12 but I'm using VS 16.7.5 , targetting v11.0.
I see 3 errors (all of them are the same), but there are no pointers to which library is referencing the support libraries /causing the errors. So frustrating :(

[ashlar64]

Did you guys find a solution to this?

[MichaelRodrigueess0s1]

i had a some fuking problem!!

[xleon]

Indeed you have a problem. Throwing that kind of offensive and useless comments here does not help anyone.
If you don't have anything to add to the conversation, why even bothering?

[moljac]

Indeed you have a problem. Throwing that kind of offensive and useless comments here does not help anyone. If you don't have anything to add to the conversation, why even bothering?

Thank you very much. Appreciated.