Outdated Kotlin Runtime warning in Android Studio

Question

After downloaded and installed latest Kotlin plugin I have Outdated Kotlin Runtime warning from Android Studio that telling me:

Your

Answer 1

I've run into this issue a few times in Android Studio and IDEA, found that if you go into your projects Gradle file and in your dependencies if you set the version of the kotlin-gradle-plugin to $kotlin_version then the warning message will tell you what version you need to set ext.kotlin_version to.

buildscript {
ext.kotlin_version = '1.2.40'
repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.1.2'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}
}

Answer 2

As of March 8, 2019 the current kotlin version is '1.3.21'

Under build.gradle

buildscript {
   ext.kotlin_version = '1.3.21'
   repositories {
      google()
      jcenter()
   }
   dependencies {
      classpath 'com.android.tools.build:gradle:3.3.2'
      classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

cheers

Answer 3

In your (Project: [projectName]) build.gradle file find this: ext.kotlin_version = 'x.x.x' and replace x.x.x with the current version of your Kotlin plugin.

In order to check which is the current version of your Kotlin plugin:

1. Go to: Tools -> Kotlin -> Confugure Kotlin Plugin Updates

2. Click "Check again". After a second you will see the version of your Kotlin plugin. (If not up to date, your Kotlin plugin will be updated.)

N.B.: Also check your (Module: app) build.gradle file and assure that you do not use:

compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:1.2.21" 

but

compile 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.40'

Note the difference "...jre7..." -> "...jdk7...". Also replace "1.2.40" with your current Kotlin plugin version.

Answer 4

Kotlin newest version:

buildscript {
    ext.kotlin_version = '1.2.41'

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
        classpath 'com.google.gms:google-services:1.5.0-beta2'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

Answer 5

it complained (on Android Studio 3.0.1) ...most likely because of referenced libraries' dependencies:

Your version of Kotlin runtime in 'org.jetbrains.kotlin:kotlin-stdlib:1.1.3@jar' library is 1.1.3, while plugin version is 1.1.51-release-Studio3.0-1.

then I've enforced building against the version it demanded, in the module level build.gradle:

configurations.all() {
    resolutionStrategy.force 'org.jetbrains.kotlin:kotlin-stdlib:1.1.51'
}

and the result is:

./gradlew app:dependencies | grep kotlin
Download https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib/1.1.51/kotlin-stdlib-1.1.51.pom
 |    |    +--- org.jetbrains.kotlin:kotlin-stdlib:1.1.3 -> 1.1.51
 ...

Answer 6

changing your ext.kotlin_version from '1.1.2-4'to ext.kotlin_version = '1.1.2-5' solved the problem for me