Namespace not specified. Specify a namespace in the module's build file

[MrCsabaToth]

Steps to Reproduce

I depend on soundpool 2.3.0 in my app. I just tried to upgrade the Android side of the Flutter app to AGP 8.0+ (to be precise it's AGP 8.1 now), because Android Studio brings up the upgrade assistant for the last half year about this. The upgrade fails because some of the plugins don't have the namespace in their build.gradle. On of the failing plugins is the soundpool.

The build error message

A problem occurred configuring project ':soundpool'.
> Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
   > Namespace not specified. Specify a namespace in the module's build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

Code sample

Current build.gradle:

android {
    compileSdkVersion 31

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
    defaultConfig {
        minSdkVersion 16
    }
    lintOptions {
        disable 'InvalidPackage'
    }
}

Expected (the way it is handled in Flutter Community plugins, along with he removal of the namespace from the AndroidManifest.xml):

android {
    // Conditional for compatibility with AGP <4.2.
    if (project.android.hasProperty("namespace")) {
        namespace 'pl.ukaszapps.soundpool'
    }

    compileSdkVersion 31

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
    defaultConfig {
        minSdkVersion 16
    }
    lintOptions {
        disable 'InvalidPackage'
    }
}

Details

• Platform: Android 12, OnePlus Nord EU (AC2003)
• Flutter version: Channel beta, 3.13.0-0.2.pre
• Development OS: Devuan GNU/Linux 6 (excalibur/ceres) 6.4.0-1-amd64, locale en_US.UTF-8
• soundpool version: 2.3.0

---

• [x] I searched for similar issues already
• [x] I filled the details section with the exact device model and version
• [x] I am able to provide a reproducible example

[MrCsabaToth]

Should I craft a PR or the project is dead?

[ukasz123]

Almost. But the PR would be helpful.

[MrCsabaToth]

Done!