Android Studio Duplicate class kotlin-CodePudding

Duplicate class kotlin.internal.jdk7.JDK7PlatformImplementations found in modules jetified-kotlin-stdlib-1.8.0 (org.jetbrains.kotlin:kotlin-stdlib:1.8.0) and jetified-kotlin-stdlib-jdk7-1.3.31 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.31)

Duplicate class kotlin.jdk7.AutoCloseableKt found in modules jetified-kotlin-stdlib-1.8.0 (org.jetbrains.kotlin:kotlin-stdlib:1.8.0) and jetified-kotlin-stdlib-jdk7-1.3.31 (org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.31)

**./gradlew clean **

build.gradle file:



buildscript {
    ext {
        buildToolsVersion = "30.0.0"
        minSdkVersion = 23
        compileSdkVersion = 33
        targetSdkVersion = 30
        googlePlayServicesAuthVersion = "16.0.1"
        kotlinVersion = "1.8.0"
    }
    
    firebase: [
        bom           : "26.0.0"
    ]
    
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {

        classpath "com.android.tools.build:gradle:4.2.0" 
        classpath "com.google.gms:google-services:4.3.4"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"

    }
}
def REACT_NATIVE_VERSION = new File(['node', '--print',"JSON.parse(require('fs').readFileSync(require.resolve('react-native/package.json'), 'utf-8')).version"].execute(null, rootDir).text.trim())
allprojects {
    repositories {
        configurations.all {
            resolutionStrategy {

                force "com.facebook.react:react-native:"   REACT_NATIVE_VERSION
            }
        }
        mavenLocal()
        maven {

            url("$rootDir/../node_modules/react-native/android")
        }
        maven {

            url("$rootDir/../node_modules/jsc-android/dist")
        }
        maven { url 'https://maven.google.com' }
        google()
        jcenter()
        maven { url 'https://www.jitpack.io' }
    }
}

CodePudding user response：

I started having the same issue in react native native on the android side. I upgraded Kotlin to version 1.8.0 and built the app again and the issue was fixed. Maybe trying upgrading the kotlin version.

In android/build.gradle update the following

kotlinVersion = "1.8.0"

and add this under dependencies

classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"

CodePudding user response：

This can happen when you're using different versions for different Kotlin dependencies.

Try to check all Kotlin dependencies. In my case, issue was with this core-ktx

implementation "androidx.core:core-ktx: "
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

Updating to this resolved issue

implementation "androidx.core:core-ktx:$kotlin_version"
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

Here kotlin_version = '1.7.0'. You can use your desired version. Hope this will help others.

CodePudding user response：

may be using two same library on project

CodePudding user response：

I was having the same problem since yesterday. I found that the reason behind this could be the artifact merge in Kotlin 1.8.0. Here is an issue talking about this breaking change.

So setting kotlinVersion = "1.8.0" as @Narasimha said works. But I still didn't figure out what dependency changed overnight that somehow made kotlin-stdlib:1.8.0 appear in the build logs.

CodePudding user response：

Thanks all, I solve it by doing two things

In android/build.gradle update the following

kotlinVersion = "1.8.0"

In android/app/build.gradle add the following in dependencies

implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.0"))

CodePudding user response：

I had the same problem with my app. It failed to build because of duplicate classes found in modules jetified-kotlin-stdlib-1.8.0 and jetified-kotlin-stdlib-jdk8-1.6.10

With the link, shared by Igor VANIAN : https://kotlinlang.org/docs/whatsnew18.html#usage-of-the-latest-kotlin-stdlib-version-in-transitive-dependencies I added

dependencies {
    ...

    implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.0"))
}

to my android/app/build.gradle and Android builds fine now