Flutter config broken for Gradle 8.1.0

[derekpitts28]

See solution here for fix: https://issuetracker.google.com/issues/277166577

From the issue:

Status: Won't Fix (Intended Behavior)
Thanks for sharing the repro. The issue is in the build script that triggers eager task creation, which breaks AGP task configuration. Please use:

tasks.configureEach {
     if(name.startsWith("connectedNet")) {
        enabled = false
    }
}
instead of tasks.whenTaskAdded (see [Gradle docs](https://docs.gradle.org/current/userguide/task_configuration_avoidance.html#sec:old_vs_new_configuration_api_overview) for more info). After this modification, R8 will fail with missing classes, so please follow instructions at https://developer.android.com/build/releases/past-releases/agp-7-0-0-release-notes#r8-missing-class-warning to fix that.

Sidenote: I'd advise against disabling tasks in this way. If you'd like to disable instrumented tests, see https://github.com/android/gradle-recipes/blob/0db8094e5a1a9661f61958db85380320157f5050/Groovy/disableAndroidTest/app/build.gradle#L15.

[kevtechi]

Can confirm, builds failing because namespace is not set in this plugin.

When you try and set it manually, it generates the error in the link above.

Was not able to solve.

[derekpitts28]

Any idea when we can expect a bump to AGP 8.0+?

[unacorbatanegra]

In the mean time you can add this to the end of your build.gradle
it will fix the problem for all the packages

subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}


subprojects {
    afterEvaluate { project ->
        if (project.hasProperty('android')) {
            project.android {
                if (namespace == null) {
                    namespace project.group
                }
            }
        }        
    }
    
}

subprojects {
    project.evaluationDependsOn(':app')
}


tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

[Farhan-ns]

@unacorbatanegra Thanks it works!

[jwson-automation]

@unacorbatanegra Thank you! you saved my life!

[KiddoV]

@unacorbatanegra How do you do that if you have build.gradle.kts file instead?

[KiddoV]

Added this to build.gradle.kts but still got namespace error:

import com.android.build.gradle.BaseExtension
import org.gradle.api.tasks.Delete

// [....]

project.buildDir = file("${rootProject.buildDir}/${project.name}")

subprojects {
    afterEvaluate {
        if (project.extensions.findByName("android") is BaseExtension) {
            val androidExt = project.extensions.getByName("android") as BaseExtension
            if (androidExt.namespace == null) {
                androidExt.namespace = project.group.toString()
            }
        }
    }
}

subprojects {
    project.evaluationDependsOn(":app")
}

tasks.named<Delete>("clean") {
    delete(rootProject.buildDir)
}

Passed the syntax error. but still got:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':flutter_config'.
> 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: ...\AppData\Local\Pub\Cache\hosted\pub.dev\flutter_config-2.0.2\android\build.gradle. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

     If you've specified the package attribute in the source AndroidManifest.xml, you can use the AGP Upgrade Assistant to migrate to the namespace value in the build file. Refer to https://d.android.com/r/tools/upgrade-assistant/agp-upgrade-assistant for general information about using the AGP Upgrade Assistant.

[herdianmurphy]

@unacorbatanegra How do you do that if you have build.gradle.kts file instead?

For build.gradle.kts

subprojects {
    afterEvaluate {
        if (project.extensions.findByName("android") != null) {
            project.extensions.configure<com.android.build.gradle.BaseExtension>("android") {
                if (namespace == null) {
                    namespace = project.group.toString()
                }
            }
        }
    }
}