Build fails with `Execution failed for task ':app:checkReleaseDuplicateClasses'.`

[Aturex1]

I'm using this extension for a timer running in the background, but when I run (flutter run --release) the code, the build fails with an exeption: Execution failed for task ':app:checkReleaseDuplicateClasses'..

Full build code

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:checkReleaseDuplicateClasses'.

A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable Duplicate class kotlin.collections.jdk8.CollectionsJDK8Kt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.internal.jdk7.JDK7PlatformImplementations found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.internal.jdk7.JDK7PlatformImplementations$ReflectSdkVersion found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.internal.jdk8.JDK8PlatformImplementations found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.io.path.ExperimentalPathApi found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.io.path.PathRelativizer found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.io.path.PathsKt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.io.path.PathsKt__PathReadWriteKt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.io.path.PathsKt__PathUtilsKt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.jdk7.AutoCloseableKt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk7-1.7.10 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.10) Duplicate class kotlin.jvm.jdk8.JvmRepeatableKt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.random.jdk8.PlatformThreadLocalRandom found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.streams.jdk8.StreamsKt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$1 found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$2 found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$3 found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.streams.jdk8.StreamsKt$asSequence$$inlined$Sequence$4 found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.text.jdk8.RegexExtensionsJDK8Kt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0) Duplicate class kotlin.time.jdk8.DurationConversionsJDK8Kt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.0 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0)

 Go to the documentation to learn how to <a href="d.android.com/r/tools/classpath-sync-errors">Fix dependency resolution errors</a>.

• Try:

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

BUILD FAILED in 2s Running Gradle task 'assembleRelease'... 2.927ms Exception: Gradle task assembleRelease failed with exit code 1 #0 throwToolExit (package:flutter_tools/src/base/common.dart:10:3) #1 AndroidGradleBuilder.buildGradleApp (package:flutter_tools/src/android/gradle.dart:491:9) #2 AndroidGradleBuilder.buildApk (package:flutter_tools/src/android/gradle.dart:220:5) #3 AndroidDevice.startApp (package:flutter_tools/src/android/android_device.dart:578:7) #4 FlutterDevice.runCold (package:flutter_tools/src/resident_runner.dart:533:33) #5 ColdRunner.run (package:flutter_tools/src/run_cold.dart:57:28) #6 RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:745:27) #7 FlutterCommand.run. (package:flutter_tools/src/runner/flutter_command.dart:1350:27) #8 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19) #9 CommandRunner.runCommand (package:args/command_runner.dart:212:13) #10 FlutterCommandRunner.runCommand. (package:flutter_tools/src/runner/flutter_command_runner.dart:348:9) #11 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19) #12 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:294:5) #13 run.. (package:flutter_tools/runner.dart:112:9) #14 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19) #15 main (package:flutter_tools/executable.dart:90:3)

android/app/build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    namespace "com.example.intervall_timer"
    compileSdkVersion 34
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

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

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.intervall_timer"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

[mehmetgencdal]

https://stackoverflow.com/questions/56716047/execution-failed-for-task-appcheckdebugduplicateclasses-ionic4-android

Worked for me.

android/app/build.gradle

dependencies { constraints { implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.8.0") { because("kotlin-stdlib-jdk7 is now a part of kotlin-stdlib") } implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.0") { because("kotlin-stdlib-jdk8 is now a part of kotlin-stdlib") } }

[Aturex1]

https://stackoverflow.com/questions/56716047/execution-failed-for-task-appcheckdebugduplicateclasses-ionic4-android

Worked for me.

android/app/build.gradle

dependencies { constraints { implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.8.0") { because("kotlin-stdlib-jdk7 is now a part of kotlin-stdlib") } implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.0") { because("kotlin-stdlib-jdk8 is now a part of kotlin-stdlib") } }

I also had this before but it still doesn't work. However, now I'm using the (workmanager)[https://pub.dev/packages/workmanager] package and that works

[maksonlee]

https://stackoverflow.com/questions/56716047/execution-failed-for-task-appcheckdebugduplicateclasses-ionic4-android

Worked for me.

android/app/build.gradle

dependencies { constraints { implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.8.0") { because("kotlin-stdlib-jdk7 is now a part of kotlin-stdlib") } implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.0") { because("kotlin-stdlib-jdk8 is now a part of kotlin-stdlib") } }

this works for me.