Your project requires a newer version of the Kotlin Gradle plugin. (Android Studio)

Question

I've just updated my flutter project packages to be null-safety compliant and now Android Studio wants me to update my project to use the latest version of Kotling Gradle Plugin. Can't see where to change this though. I have tried to change "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" into "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.6.10" but this has no effect.

My build.grade-file looks like this:

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"

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    compileSdkVersion 31

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

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "*********"
        minSdkVersion 30
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }



    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }

}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    implementation 'com.google.firebase:firebase-analytics:17.2.2'
}
apply plugin: 'com.google.gms.google-services'

Build output:

BUILD FAILED in 8s
[!] Your project requires a newer version of the Kotlin Gradle plugin.
    Find the latest version on https://kotlinlang.org/docs/gradle.html#plugin-and-versions, then update project/android/build.gradle:
    ext.kotlin_version = ''
Exception: Gradle task assembleDebug failed with exit code 1

user_4758255 · Answer

You need to change the kotlin version in your android root project, projectName/android/build.gradle, instead of projectName/android/app/build.gradle.

Change the version at ext.kotlin_version line:

buildscript {
    ext.kotlin_version = '1.6.10' // Change here
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

UPDATE

The above solution will also works if your android part of the project is using java where the dependencies are using kotlin and you've encountered the following error:

Incompatible classes were found in dependencies. Remove them from the classpath or use '-Xskip-metadata-version-check' to suppress errors
e: /home/user/.gradle/caches/transforms-3/36814238b86d8b6b6f9e4e1263bce879/transformed/jetified-kotlinx-coroutines-core-jvm-1.5.2.jar!/META-INF/kotlinx-coroutines-core.kotlin_module: 
Module was compiled with an incompatible version of Kotlin. 
The binary version of its metadata is 1.5.1, expected version is 1.1.15.

AndroidStudio or IntelliJ Idea will give hint in the project build.grade file if the kotlin is not the same with the installed kotlin in the IDE.

user_4993045 · Answer

Update your Kotlin to the Latest version. You can see the latest version here

ext.kotlin_version = '1.6.10' //

You can see the latest version of Kotlin from the below link https://kotlinlang.org/docs/gradle.html#plugin-and-versions

user_10253856 · Answer

change build gradle to this :

classpath 'com.android.tools.build:gradle:4.1.0'

and gradle-wrapper to this :

distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip

user_7333202 · Answer

I Update Flutter to 2.10.1 and I found All My Project Has Same Error in app /build.gradl you change to ext.kotlin_version = '1.6.10'

user_9846388 · Answer

In my case, I don't use kotlin in my flutter project, but some of my dependencies use it (It was assets_audio_player for me), so I had to go to build.gradle for that dependency and update the kotlin version as other answers here:

ext.kotlin_version = ''

Note 1: you can open build.gradle for the library you want by opening the android module in Android Studio then go to Gradle Scripts from Project tab.

Note 2: you can know which library is causing the error by looking at:

Execution failed for task ':assets_audio_player:compileDebugKotlin'.

It could be more than one library, so after you change kotlin version the error will be changed.

user_1901574 · Answer

1- First change ext.kotlin_version on projectName/android/build.gradle

buildscript {
    ext.kotlin_version = '1.6.10'
}

2- Second change build gradle to this :

distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip

user_7103882 · Answer

Change the build gradle version to 4.1.0 or higher in the project-level build.gradle file:
```
classpath 'com.android.tools.build:gradle:4.1.0'
```
Change the gradle wrapper version to 6.7-all or higher in the gradle-wrapper.properties file:
```
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
```

Change the ext.kotlin_version to 1.6.10 or higher in the project level build.gradle file:

buildscript {
  ext.kotlin_version = '1.6.10' // Change like this
  repositories {
      google()
      jcenter()
  }

  dependencies {
      classpath 'com.android.tools.build:gradle:4.1.0'
      classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

user_5197712 · Answer

You have to change the kotlin version in your android root, go to

projectName/android/build.gradle

buildscript {
    ext.kotlin_version = '1.7.0'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

And change the gradle wrapper version to 6.7.1-all or higher in the gradle-wrapper.properties

distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip

user_16089525 · Answer

Add latest kotlin verson in your project

 buildscript {
ext.kotlin_version = '1.6.10'
repositories {
    google()
    mavenCentral()
}

user_12618156 · Answer

Maybe anyone else is stumbling across an issue I had after upgrading flutter: If you use flutter together with aws_amplify you have to also upgrade amplify. This is a issue I had with the same error message.

Your project requires a newer version of the Kotlin Gradle plugin. (Android Studio)

10 Answers