Xamarin.AndroidX.legacy.Support.V13 not being installed on my app!!!

andre eis 1 Reputation point
2022-05-24T14:31:02.707+00:00

My first error was that I could not upload the latest copy of my app to google store as they now require API 30 and I was using 29
I changed target framework to 12 and target version to 12 (API 31)
I then got some errors about wanting a different sdk which I installed
This was followed by some packages wanting a nuGet update - unfortunately I just clicked all followed by update without taking a note of what it wanted

Then I got the following

Error Could not find 3 Android X assemblies, make sure to install the following NuGet packages:

  • Xamarin.AndroidX.Legacy.Support.V13
  • Xamarin.AndroidX.MediaRouter
  • Xamarin.AndroidX.Palette
    You can also copy-and-paste the following snippet into your .csproj file:
    <PackageReference Include="Xamarin.AndroidX.Legacy.Support.V13" Version="1.0.0.5" />
    <PackageReference Include="Xamarin.AndroidX.MediaRouter" Version="1.2.0" />
    <PackageReference Include="Xamarin.AndroidX.Palette" Version="1.0.0.5" />

If I add these to the the .Android.csproj the error doesn't go away.
If instead I add them to the normal .csproj the above error goes away but I get this new one

Package Xamarin.AndroidX.Palette 1.0.0.5 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package Xamarin.AndroidX.Palette 1.0.0.5 supports: monoandroid90 (MonoAndroid,Version=v9.0)Severity Code Description Project File Line Suppression State
Package Xamarin.AndroidX.MediaRouter 1.2.0 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package Xamarin.AndroidX.MediaRouter 1.2.0 supports: monoandroid90 (MonoAndroid,Version=v9.0)
Package Xamarin.AndroidX.Legacy.Support.V13 1.0.0.5 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package Xamarin.AndroidX.Legacy.Support.V13 1.0.0.5 supports: monoandroid90 (MonoAndroid,Version=v9.0)

However 3 nuGet updates appear
Doing update all gives

Package restore failed. Rolling back package changes
Package Xamarin.AndroidX.Palette 1.0.0.13 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package Xamarin.AndroidX.Palette 1.0.0.13 supports:

  • monoandroid12.0 (MonoAndroid,Version=v12.0)
  • net6.0-android31.0 (.NETCoreApp,Version=v6.0)
    Package Xamarin.AndroidX.MediaRouter 1.3.0 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package Xamarin.AndroidX.MediaRouter 1.3.0 supports:
  • monoandroid12.0 (MonoAndroid,Version=v12.0)
  • net6.0-android31.0 (.NETCoreApp,Version=v6.0)
    Package Xamarin.AndroidX.Legacy.Support.V13 1.0.0.13 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package Xamarin.AndroidX.Legacy.Support.V13 1.0.0.13 supports:
  • monoandroid12.0 (MonoAndroid,Version=v12.0)
  • net6.0-android31.0 (.NETCoreApp,Version=v6.0)

cmd
dotnet --version
6.0.300

Why can I not update these 3 packages?
Why do I suddenly need them when I have not needed them for the last 3 years?

Xamarin
Xamarin
A Microsoft open-source app platform for building Android and iOS apps with .NET and C#.
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  1. Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 35,291 Reputation points Microsoft Vendor
    2022-05-25T01:44:42.28+00:00

    Hello,

    Please make sure that you are installing NuGet packages into the Android project in Xamarin.

    In addition, I found that you used MonoAndroid,Version=v9.0. Referring to this Announcement Updated AndroidX packages require MonoAndroid12.0+, If you want to use AndroidX package, you need to add MonoAndroid12.0+ reference into your project.

    Best Regards,

    Alec Liu.

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