Incompatible with AGP 8 (Android Gradle Plugin)

[ciriousjoker]

Error message during build:

FAILURE: Build failed with an exception.

• What went wrong:
  A problem occurred configuring project ':flutter_health_connect'.

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.

 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.

• Try:

Run with --stacktrace option to get the stack trace.
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Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 13s
Error: Gradle task assembleDebug failed with exit code 1

[kyurikotpq]

@ciriousjoker I ran into the same issue, not sure if you've solved it yet but I edited the plugin's android/build.gradle file:

android {
    compileSdkVersion 33

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        minSdkVersion 26

        namespace("dev.duynp.flutter_health_connect")   // <-- Added this line
    }
}

And the error went away for me