Java source file set build-action "AndoidJavaSource" in project causes compile error

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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[regression]
VS2022 Ver.17.8.4 with .net8.0-android34.0 project
Java sources within project those which build-action set to "AndroidJavaSource" causes compile error.

After cleaning the solution or project, the build is successfully, and success to deploy package into device, too.
And .cs files(callable-wrapper files) are generated in /obj/Debug/net8.0-android34.0/generated/src/, but IDE continue to indicate CS0246 error and so on.

After change the source , build is fault with error and files in generated/src are deleted.
We add generated .cs files to the project , IDE's error is disapeared, but build failed with dupulicate definition error.

After all we need to clean→build every time to debug the source.

How can I add Java source code to a project without getting an error?

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Original Comments

Feedback Bot on 1/23/2024, 08:52 PM:

(private comment, text removed)

Dean Ellis [MSFT] on 1/24/2024, 06:05 AM:

(private comment, text removed)

デスクトップPC ユーカリ on 1/24/2024, 07:01 AM:

(private comment, text removed)

デスクトップPC ユーカリ on 1/26/2024, 08:27 AM:

(private comment, text removed)

デスクトップPC ユーカリ on 1/26/2024, 04:04 PM:

(private comment, text removed)

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Original Solutions

(no solutions)

[StudioLMZa]

This is the bug?
Is interoperability between C# and Java impossible at the source code level?

[dellis1972]

Do you have a sample which demonstrates the issue?

[StudioLMZa]

Do you have a sample which demonstrates the issue?

This is the sample to reproduce.
AndroidApp2.zip

[dellis1972]

@StudioLMZa

I suspect you are hitting the same issue as #8658.

Can you try adding the following to the first PropertyGroup in your csproj.

<DisableFastUpToDateCheck>true</DisableFastUpToDateCheck>

See if that helps. Alternatively in Visual Studio goto

Tools | Options | Projects and Solutions | SDK-Style Projects

and disable the "Up to Date Checks".

[StudioLMZa]

When I tried it, a compile error occurred, but I was able to deploy it.
However, this option prevents to detect the change code with "build". After all, I have to "rebuild" and compile all the code every time to deploy.
Is this spec?

[dellis1972]

ok, so its Intellisense which is not working.

[StudioLMZa]

yes, Intellisense is not working at all, even if *.cs exists in object/.../generated folder or not.
And the generated *.cs files are disappeared when build after rebuild even if DisableFastUpToDateCheck is true or not.