[Android] Unable to deploy after rebuild

[nickrandolph]

Current behavior

Forcing a rebuild on Mobile project prevents Android app from being able to be deployed with following errors:
12:59:43:995 APT2260: resource drawable/splash_screen (aka com.companyname.UnoApp1:drawable/splash_screen) not found.
12:59:43:996 APT2260: resource drawable/splash_screen (aka com.companyname.UnoApp1:drawable/splash_screen) not found.
12:59:43:996 APT2260: resource drawable/splash_screen (aka com.companyname.UnoApp1:drawable/splash_screen) not found.
12:59:43:996 APT2260: resource drawable/splash_screen (aka com.companyname.UnoApp1:drawable/splash_screen) not found.
12:59:43:996 APT2062: failed linking references.

Expected behavior

No errors and successful deploy/run

How to reproduce it (as minimally and precisely as possible)

• Create new project using Blank preset in Wizard
• Build and run the Mobile project
• Force Rebuild on the Mobile project
• Press Run which should deploy and run the project but will fail with errors

Environment

Nuget Package:

Package Version(s):

Affected platform(s):

• iOS
• Android
• WebAssembly
• WebAssembly renders for Xamarin.Forms
• Windows
• Build tasks

Visual Studio:

• 2017 (version: )
• 2019 (version: )
• for Mac (version: )

Relevant plugins:

• Resharper (version: )

Anything else we need to know?

[jeromelaban]

This may be an uno issue. If you can create a binlog of the issue reproducing, we may be able to find a fix.

[pictos]

@jeromelaban I recorded all the binlogs for the steps mentioned by Nick. Let me know if it's something here or on Uno.

1_FirstBuild.zip
2_Rebuild.zip
3_DeployAndFail.zip

[Youssef1313]

Maybe related to? dotnet/android#6534
But we should find a workaround anyway.

Also, the _GenerateAndroidResourceDir might be incorrectly being skipped?

[Youssef1313]

@pictos Would you be able to test if <CallTarget Targets="_GenerateAndroidResourceDir" /> would workaround this issue? We would force _GenerateAndroidResourceDir after resizetizer does its work by adding the CallTarget just after this line:

uno.resizetizer/src/.nuspec/Uno.Resizetizer.targets

Line 587 in a394b82

</ItemGroup>

[pictos]

@Youssef1313 I'll give it a try and post the results here ASAP

[Youssef1313]

dotnet/android#7780 have fixed a similar error.

I tried to include what is in that PR like this:

	<Target Name="WorkaroundXamarin7780" Condition="'$(_ResizetizerIsAndroidApp)' == 'True'" AfterTargets="_ResolveLibraryProjectImports">
		<ItemGroup>
			<FileWrites Include="$(_AndroidLibraryProjectImportsCache)"
				Condition="Exists ('$(_AndroidLibraryProjectImportsCache)')"/>
		</ItemGroup>
	</Target>

but it didn't work.

Also force running _GenerateAndroidResourceDir with my suggestion above didn't work (Thanks Pedro for testing it).

I found a different way to force run this target by deleting _AndroidResFlagFile before it's run, but that didn't work too.

I'm out of ideas.