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[Xamarin.Android.Build.Tasks] fix .aar files flowing from project references #8193

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Jul 18, 2023

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@jonathanpeppers jonathanpeppers commented Jul 17, 2023

Fixes: #8190

In a customer sample, they have an .aar file they need the Java code from, but do not want a C# binding for it:

<AndroidLibrary Update="FooNonBinding-release.aar" Bind="false" />

Bind="false" looks to have the side effect where:

  1. It does not get copied to the output directory.

  2. The Java types don't make it to the final app.

  3. Crash at runtime:

java.lang.ClassNotFoundException: Didn't find class "com.example.foononbinding.FooSample" on path

A workaround is to add a line such as:

<None Include="FooNonBinding-release.aar" CopyToOutputDirectory="PreserveNewest" />

I could reproduce this issue by updating our existing DotNetBuildLibrary test. I could assert the file exists in the output directory, as well as actually using dexdump to verify Java classes make it to the app. They did not!

The solution here being that we are missing a line such as:

<!-- .aar files should be copied to $(OutputPath) in .NET 6-->
++<None Include="@(AndroidAarLibrary)" TfmSpecificPackageFile="%(AndroidAarLibrary.Pack)" Pack="false" CopyToOutputDirectory="PreserveNewest" Link="%(Filename)%(Extension)" />
<None Include="@(LibraryProjectZip)" TfmSpecificPackageFile="%(LibraryProjectZip.Pack)" Pack="false" CopyToOutputDirectory="PreserveNewest" Link="%(Filename)%(Extension)" />

Now the DotNetBuildLibrary test passes.

…eferences

Fixes: dotnet#8190

In a customer sample, they have an `.aar` file they need the Java code
from, but do not want a C# binding for it:

    <AndroidLibrary Update="FooNonBinding-release.aar" Bind="false" />

`Bind="false"` looks to have the side effect where:

1. It does not get copied to the output directory.

2. The Java types don't make it to the final app.

3. Crash at runtime:

    java.lang.ClassNotFoundException: Didn't find class "com.example.foononbinding.FooSample" on path

A workaround is to add a line such as:

    <None Include="FooNonBinding-release.aar" CopyToOutputDirectory="PreserveNewest" />

I could reproduce this issue by updating our existing
`DotNetBuildLibrary` test. I could assert the file exists in the output
directory, as well as actually using `dexdump` to verify Java classes
make it to the app. They did not!

The solution here being that we are missing a line such as:

    <!-- .aar files should be copied to $(OutputPath) in .NET 6-->
    ++<None Include="@(AndroidAarLibrary)" TfmSpecificPackageFile="%(AndroidAarLibrary.Pack)" Pack="false" CopyToOutputDirectory="PreserveNewest" Link="%(Filename)%(Extension)" />
    <None Include="@(LibraryProjectZip)" TfmSpecificPackageFile="%(LibraryProjectZip.Pack)" Pack="false" CopyToOutputDirectory="PreserveNewest" Link="%(Filename)%(Extension)" />

Now the `DotNetBuildLibrary` test passes.
@dellis1972 dellis1972 merged commit 26ffd5d into dotnet:main Jul 18, 2023
@jonathanpeppers jonathanpeppers deleted the AndroidLibraryBindFalse branch July 18, 2023 13:05
jonathanpeppers added a commit that referenced this pull request Jul 18, 2023
…eferences (#8193)

Fixes: #8190

In a customer sample, they have an `.aar` file they need the Java code
from, but do not want a C# binding for it:

    <AndroidLibrary Update="FooNonBinding-release.aar" Bind="false" />

`Bind="false"` looks to have the side effect where:

1. It does not get copied to the output directory.

2. The Java types don't make it to the final app.

3. Crash at runtime:

    java.lang.ClassNotFoundException: Didn't find class "com.example.foononbinding.FooSample" on path

A workaround is to add a line such as:

    <None Include="FooNonBinding-release.aar" CopyToOutputDirectory="PreserveNewest" />

I could reproduce this issue by updating our existing
`DotNetBuildLibrary` test. I could assert the file exists in the output
directory, as well as actually using `dexdump` to verify Java classes
make it to the app. They did not!

The solution here being that we are missing a line such as:

    <!-- .aar files should be copied to $(OutputPath) in .NET 6-->
    ++<None Include="@(AndroidAarLibrary)" TfmSpecificPackageFile="%(AndroidAarLibrary.Pack)" Pack="false" CopyToOutputDirectory="PreserveNewest" Link="%(Filename)%(Extension)" />
    <None Include="@(LibraryProjectZip)" TfmSpecificPackageFile="%(LibraryProjectZip.Pack)" Pack="false" CopyToOutputDirectory="PreserveNewest" Link="%(Filename)%(Extension)" />

Now the `DotNetBuildLibrary` test passes.
grendello added a commit to grendello/xamarin-android that referenced this pull request Jul 18, 2023
* main:
  [Xamarin.Android.Build.Tasks] fix `.aar` files flowing from project references (dotnet#8193)
jonathanpeppers added a commit that referenced this pull request Jul 18, 2023
…roject references (#8193)"

Context: #8196

This reverts commit 02bd7db.

Given the issue found with building .NET MAUI. Let's let the change
"cook" a bit before servicing this change.
grendello added a commit to grendello/xamarin-android that referenced this pull request Jul 18, 2023
* main:
  [Xamarin.Android.Build.Tasks] fix `.aar` files flowing from project references (dotnet#8193)
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Adding .aar and .jar dependencies without C# bindings in Android Java Library Binding Project
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