android:attr/lStar not found on Unity export when building in production

[Drarox]

Describe the bug I cannot build a production APK, the build fail with this error :

Execution failed for task ':flutter_unity_widget:verifyReleaseResources'.
> A failure occurred while executing com.android.build.gradle.tasks.VerifyLibraryResourcesTask$Action
   > Android resource linking failed
     ERROR:/Users/yannick/projects/Recim/build/flutter_unity_widget/intermediates/merged_res/release/values/values.xml:181: AAPT: error: resource android:attr/lStar not found.

Whoever, in debug it works without any problems. I updated the kotlin and gradle version in both projects but I still cannot build in production. Has anyone already seen this error ?

Versions :

• Tried on Unity 2021.3.23f1 and 2022.3.4f1
• Flutter 3.7.12 Dart 2.19.6
• Gradle : Wrapper 7.5 and Build tools 7.4.2
• Kotlin : 1.7.21

What I already tried:

• Checked that the compileSdkVersion was up to date
• Updating and try different version of gradle, kotlin and unity
• Forcing androidx core version (force 'androidx.core:core-ktx:1.6.0')

[pen110]

hi，Do you know how to deal with it, I have the same problem.

[Rumanali786]

hii did you solve the problem? I am facing same issue.

[Rumanali786]

Hi there! 👋

I noticed that the compile SDK version in the Flutter Unity package is not up to date. To ensure compatibility and take advantage of the latest features and improvements, I recommend making the following changes:

1. In the Flutter Unity package:

   • Update the compile SDK version to the latest available. This can be done by modifying the build.gradle file in the Flutter Unity package and setting the compileSdkVersion to the latest SDK version.

2. In your project:

   • Make sure to update the Flutter Unity package to the latest version that includes the updated compile SDK. You can do this by modifying the pubspec.yaml file in your Flutter project and specifying the updated package version.

By making these changes, you'll ensure that your project is using the most recent compile SDK version, which can help resolve compatibility issues and provide access to the latest Android features.