.aar file missing from NuGet package for .net6-android binding

[VincentUhlmann]

Android application type

Android for .NET (net6.0-android, etc.)

Affected platform version

.NET6-Android

Description

Hey, I am currently facing a problem with a .net6-android binding project. Generally the binding works as long as I add the binding project as reference to e.g. a MAUI app. However, as soon as I make a NuGet package from the binding and use it, I get errors like "JAVAC0000 error: package com.foo.foo does not exist". I have now spent several hours trying to solve the problem, and for example analyzed the NuGet packages with dotPeek. I am now at the point where I have determined that the .aar file to bind does not exist in the NuGet packet. If I compare .net6-android NuGet package with e.g. MonoAndroid, I see that under .net6 no resources folder exists. If I have recognized it correctly, the .aar file should be included in the DLL. I have tried all possible things to solve the error by changing the .csproj of the binding project. I have also taken into account the information that is available here, e.g. "https://github.com/xamarin/xamarin-android/blob/main/Documentation/guides/OneDotNet.md". I can't pinpoint the problem, but I hope someone has an idea how to solve it.

Steps to Reproduce

1. Create a .net6 android binding project.
2. Bind an .aar file
3. Create a NuGet package from the binding project
4. Try to consume the NuGet package

Did you find any workaround?

No response

Relevant log output

No response

[jpobst]

In .NET 6 projects, the .aar/.jar is no longer included inside the .dll. You will need to ensure that the file is placed in the NuGet in the same directory as the .dll.

More information is available here:
https://github.com/xamarin/xamarin-android/blob/main/Documentation/guides/OneDotNetEmbeddedResources.md

[jpobst]

@jonathanpeppers If I create a new binding library and Pack it from the default template with window-extensions-1.0.0-alpha01.aar, I get this:

If I use okio-2.10.0.jar, I get this:

Contents of AndroidBinding2.aar:

Is this the expected result?

[jonathanpeppers]

Yeah, something seems wrong here, I'll test.

[jonathanpeppers]

@VincentUhlmann it appears that no one noticed this case wasn't right...

For now I'd workaround this with something like:

<ItemGroup>
  <AndroidLibrary Update="**\*.aar" Pack="false" />
  <None Update="**\*.aar" Pack="true" PackagePath="lib\$(TargetFramework)$(TargetPlatformVersion)" />
</ItemGroup>

I'll post this on a MAUI / Android known issues document. Thanks for catching this!

[jonathanpeppers]

Linked to this problem at:

• https://github.com/xamarin/xamarin-android/wiki/Known-issues-in-.NET
• https://github.com/dotnet/maui/wiki/Known-Issues

[VincentUhlmann]

Glad I could help / contribute to this! Thanks also for the workaround, I will test as soon as I have time.