Updated to Android Studio 3.0. Getting a "Kotlin not configured" error

Question

I just updated to Android Studio 3.0 and I'm getting this error with an existing project:

Kotlin not configured

When I go to Tools>Kotlin>Configure Kotlin in Project, I get an error saying "no configurators available". Also get the error below with the red java:

I've also tried:

Restarting
Clean and Rebuild
Invalidate caches/restart.

Try a clean build from CLI, it worked for me: close Android Studio and run `./gradlew clean assembleDebug` then start Android Studio again. — bearlysophisticated, Nov 08 '17 at 10:05
thanks @m3dw3 . It worked for me. I faced this issue after changing my .gradle directory path. — user1154390, Aug 07 '18 at 09:48
In my newly created project (via Android Studio 3.2.1 stable), I had following kotlin version defined in project's build.gradle: `ext.kotlin_version = '1.3.11' '1.2.71'`. I removed the second version and so it looked like this `ext.kotlin_version = '1.3.11'`. — Sufian, Dec 13 '18 at 13:01

score 47 · Accepted Answer · edited Jun 27 '18 at 18:25

47

I first tried with invalidate cache/ restart option but it doesn't help me.

When I updated Kotlin to 1.1.60 in project's gradle file, problem is solved.

Also, use this in app's gradle for stdlib

implementation "org.jetbrains.kotlin:kotlin-stdlib:1.1.60"

instead of

implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:1.1.60"

edited Jun 27 '18 at 18:25

anoo_radha

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answered Nov 27 '17 at 07:53

Mladen Rakonjac

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2

A few lines of context to know where the line need to be replaced would have been nice. – Martin Apr 16 '18 at 08:04
3

I tried this which I thought resolved the issue. However, when I reverted to my original *implementation* `implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"` the error was still resolved. I must of just needed to have the gradle file re0run. – AdamHurwitz Nov 11 '18 at 05:35
Thanks! Removing jre7 from dependency helped me to sync and finally build project with a new Kotlin version. – garbus Feb 24 '19 at 18:00

score 39 · Answer 2 · edited Feb 10 '19 at 07:21

39

In Android Studio, click on File -> Invalidate Caches / Restart... , then select "Invalidated and Restart". This solved my problem.

edited Feb 10 '19 at 07:21

Zun

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answered May 11 '18 at 09:44

Colibri

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1

This answer is not specific to Mac. It also worked on my Windows machine. – Zun Feb 09 '19 at 23:15
This answer works for me. It should be the approved one – cuasodayleo Jun 14 '23 at 07:48

score 12 · Answer 3 · answered Jun 24 '21 at 21:20

This error also occurs if you have the mavenCentral() repository missing in allprojects. Your build.gradle (:app) should contain at least this:

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

jcenter() would work as well (for now), but that repository reached end-of-life and shouldn't be used any more.

score 4 · Answer 4 · answered Nov 29 '17 at 18:12

Closing and restarting Android Studio works for me in that case. Important is that there are no other projects opened in Android Studio before you close it. I suspect that closing Android Studio with multiple opened project windows sometimes messes up the configuration especially after plugin upgrades etc.

Khemraj Sharma · Answer 5 · 2019-01-24T09:06:53.033

Important Update

You should check JDK version before setting config

Kotlin gradle config page has detailed information about this.

Step 1

Check kotlin version in project level gradle file.

classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
For kotlin_version '1.2.x' Use jdk NOT jre

Step 2

Check JDK version in File > Project Structure

Or check in build.gradle

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

If no JDK version is set in Project Structure, then choose by Android Studio version

JDK version is 1.7 for Android Studio Version < 2.2.1
JDK version is 1.8 for Android Studio Version < 2.2.1

Because Android Studio is bundled with jdk 1.8 since 2.2.1 version.

You have 3 options of kotlin stdlib, choose according JDK version

implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version" //jdk_version == 1.8
implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" //jdk_version == 1.7
implementation"org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" // jdk_version is < 1.7

if kotlin version is'1.1.x' Use jre NOT jdk

implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version" // or jre8

Update Kotlin Version?

You can update Kotlin version from Tools > Kotlin > Configure Kotlin Updates

score 3 · Answer 6 · answered Mar 14 '19 at 05:56

3

Kotlin-stdlib-jre7 is deprecated since 1.2.0 and should be replaced with kotlin-stdlib-jdk7

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

answered Mar 14 '19 at 05:56

Zia

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score 3 · Answer 7 · answered Dec 10 '20 at 12:22

A common reason of the "Kotlin Not Configured" message is an internal Android Studio exception due to a bad plugin. In order to fix that you should disable the bad plugin.

When such plugin crash occurs, on the "Wellcome screen" you'll see a small notification (see illustration image) where you can click it and disable the bad plugin:

Kanishk Gupta · Answer 8 · 2018-04-16T11:58:47.713

I have faced this issue recently... when I updated to Android Studio 3.1 .

I did a few things to fix this.

First I updated the Kotlin version in my app gradle file and added
```
implementation "org.jetbrains.kotlin:kotlin-stdlib:1.2.31" 
```
in my app gradle file. But this alone didn't fix it.
Then uninstalled the kotlin plugin from settings, restarted Android Studio and installed it again.

EDIT :

This is my project gradle file

buildscript {
   ext.kotlin_version = '1.2.31'
   repositories {
      jcenter()
      google()
    }
   dependencies {
      classpath 'com.android.tools.build:gradle:3.1.1'
      classpath 'com.google.gms:google-services:3.1.0'
      classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.31"

   }
 }

allprojects {
   repositories {
      jcenter()
      maven { url "https://jitpack.io" }
      google()
   }
}

And this is my app gradle file

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'

android {

   compileSdkVersion 27

   buildToolsVersion '27.0.3'

   defaultConfig {
       ...
    }

    buildTypes {
        ...
    }

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

     kapt { generateStubs = true }


}
repositories {
     ...
}


dependencies {
    ...
    ...
    implementation "org.jetbrains.kotlin:kotlin-stdlib:1.2.31"
    ...
    ...

 }

apply plugin: 'com.google.gms.google-services'

A few lines of context to know where the line goes would have been nice. — Martin, Apr 16 '18 at 08:04

score 2 · Answer 9 · answered Sep 16 '20 at 16:49

2

just delete .idea folder from project,and run android studio again, it will resolve KOTLIN NOT CONFIGURED issue.

answered Sep 16 '20 at 16:49

user7162221

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1

score 1 · Answer 10 · answered Nov 13 '18 at 09:55

1

None of the other solutions solved my problem. I ended up figuring out that the problem lied in the google services version. Just update it to the latest.

Top level gradle at dependencies:

classpath 'com.google.gms:google-services:4.1.0'

answered Nov 13 '18 at 09:55

Ricardo

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score 1 · Answer 11 · answered Mar 18 '19 at 23:38

In my case, after the update of Android Studio and plugins, I could create new projects, but my old projects were having "Gradle Sync Issues".

The solution was in File/Project Structure.../App/Dependencies:

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

And then I just updated the Kotlin version in my project build.gradle:

From:

ext.kotlin_version = '1.2.30'

To:

ext.kotlin_version = '1.3.21'

Then I tried Sync again.

Obs: You can check your Kotlin version in Tools/Kotlin/Configure Kotlin Plugin Updates

score 1 · Answer 12 · answered Jun 24 '19 at 11:39

1

I have tried all above solutions but non of them works for me.

Then finally I got success with below solution, so it may helpful for some one like me.

Delele all .iml files (in root project, libraries and modules)
Rebuild project

answered Jun 24 '19 at 11:39

ThaiPD

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score 1 · Answer 13 · answered Sep 13 '19 at 06:58

1

In my case I had to update Android studio from version 3.4.1. to 3.5 and it resolved the kotlin not configured error.

answered Sep 13 '19 at 06:58

Anuj Kumar

91
1
9

score 1 · Answer 14 · answered Mar 06 '20 at 11:09

1

Delete .AndroidStudio3.6 folder in C:\Users\Username and re-open Android studio works for me

answered Mar 06 '20 at 11:09

Kyo Huu

520
7
13

score 1 · Answer 15 · answered Jun 17 '20 at 10:18

1

The only fix for me was adding

apply plugin: 'kotlin-android-extensions'

in build.gradle (:app)

answered Jun 17 '20 at 10:18

Ziad H.

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Alexey Soshin · Answer 16 · 2019-05-23T09:32:19.050

One other point to check is version of your Gradle in gradle-wrapper.properties, if you use one.

Make sure that distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

Has version 4.1 or higher.

You may also have the following in your build.gradle:

task wrapper(type: Wrapper) {
    gradleVersion = '4.1'
    distributionUrl = "https://services.gradle.org/distributions/gradle-$gradleVersion-all.zip"
}

Where Gradle version is lower that 4.1

score 0 · Answer 17 · answered Jun 29 '19 at 17:30

Though I see that the question already has answers that work, one might also try the following solution.

Right click on the file name (Main.kt) -> Run 'Main.kt'.

This will download a gradle file from the gradle.org website.

Wait for it to unzip. The errors were cleared.

score 0 · Answer 18 · answered Jul 17 '20 at 16:56

0

In my case, it was a broken update of one of the plugins I've used. Check your error logs from Android Studio this will lead you to what is the problem.

answered Jul 17 '20 at 16:56

ar-g

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score -1 · Answer 19 · answered May 21 '20 at 06:28

-1

Simply Create a new Activity and select its language to kotlin Android studio Automatically configured kotlin for you.

answered May 21 '20 at 06:28

Shaharyar Keerio

17
4

Updated to Android Studio 3.0. Getting a "Kotlin not configured" error

19 Answers19

Important Update

You should check JDK version before setting config

Step 1

For `kotlin_version '1.2.x'` Use `jdk` NOT `jre`

Step 2

if `kotlin version is'1.1.x'` Use jre NOT jdk

Update Kotlin Version?

Linked

Updated to Android Studio 3.0. Getting a "Kotlin not configured" error

19 Answers19

Important Update

You should check JDK version before setting config

Step 1

For kotlin_version '1.2.x' Use jdk NOT jre

Step 2

if kotlin version is'1.1.x' Use jre NOT jdk

Update Kotlin Version?

Linked

For `kotlin_version '1.2.x'` Use `jdk` NOT `jre`

if `kotlin version is'1.1.x'` Use jre NOT jdk