Develop Reference

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

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.

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"

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

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.

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.

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

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"

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'

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

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:

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'

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

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

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.

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

The only fix for me was adding
apply plugin: 'kotlin-android-extensions'
in build.gradle (:app)

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

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.

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.

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

Execution failed for task ':app:compileDebugAidl': aidl is missing

I installed Android Studio on my computer. I created a new project but that got me the error below. What can I do?
Error:Execution failed for task ':app:compileDebugAidl'.
> aidl is missing
My Android Studio version is 1.1.0.
This is my build.gradle file:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.1.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
And :
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "24.1.2"
defaultConfig {
applicationId "com.example.jo.cloning_a_login_screen"
minSdkVersion 13
targetSdkVersion 21
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.0.0'
}

In my case I downloaded version 22 of Android M and Android 5.1.1 using Android Studio 1.2.1.1 but when I try to do a Hello World this same error showed me
So the solution for me was doing right click in app like the image below and choose "Open Module Settings"
then there you have 2 options. I've changed both with the last version I had.
Compile SDK version to API 21 Lollipop
and Build Tools Version to 21.1.2
Finally clean the project and Build
UPDATED
TO Get Android Studio 1.3 follow these steps
Open the Settings window by choosing File > Settings.
Choose the Appearance & Behavior > System Settings > Updates panel.
On the Updates panel, choose the option Automatically check updates for: Canary Chanel.
On the Updates panel, select Check Now to check for the latest canary build. Download and install the build when you are prompted.
Then you'll have something like this to update your Androud Studio to 1.3 and with this you can test Android M
Update: Real Cause
This bug happens when the versions of SDK, Build Tools and Gradle Plugins doesn't match (in terms of compatibility). The solution is to verify whether you are using the latest version of them or not. The gradle plugins are placed in the build.gradle of the project, and the other versions are on the build.gradle of the module. For example, for SDK 23, you must use the Build Tools 23.0.1 and gradle plugins version 1.3.1.

It has been fixed two days ago, so you can use:
buildToolsVersion '23.0.0 rc2'
with the newest android gradle plugin:
classpath 'com.android.tools.build:gradle:1.3.0-beta2'
Note:
I had some weird problems with gradle 2.4 distribution, but trying to build the project again has fixed that for me.
EDIT
There is a newer version of build-tools 23, so you should probably use:
buildToolsVersion '23.0.0 rc3'
EDIT 2
And yet again, there are newer version of both gradle plugin and build-tools, so you can switch to using:
classpath 'com.android.tools.build:gradle:1.3.0'
and
buildToolsVersion '23.0.0'

I had a similar error with a fresh install of Android Studio 1.2.1.1 attempting to build a new blank app for API 22: Android 5.1 (Lollipop).
I fixed it by simply changing the Build Tools Version from "23.0.0 rc1" to "22.0.1" and then rebuilding.
On Windows, F4 opens the Project Structure and the Build Tools Version can be set in the Modules > app section:
I think all this does is change the setting in the build.gradle file in the app but I didn't want to change that manually just in case it does something more.

I tried to uninstall/install and it did not work. I am running OSX 10.10.3 with Android Studio 1.2.1.1 on JDK 1.8.0_45-b14 and the solution I found to work is similar to Jorge Casariego's recommendation. Basically, out of the box you get a build error for a missing 'aidl' module so simply changing the Build Tools Version to not be version 23.0.0 rc1 will solve your problem. It appears to have a bug.
UPDATE
After commenting on an Android issue on their tracker (https://code.google.com/p/android/issues/detail?id=175080) a project member from the Android Tools group commented that to use the Build Tools Version 23.0.0 rc1 you need to be using Android Gradle Plugin 1.3.0-beta1 (Android Studio comes configured with 1.2.3). He also noted (read the issue comments) that the IDE should have given an notification that you need to do this to make it work. For me I have not seen a notification and I've requested clarification from that project member. Nonetheless his guidance solved the issue perfectly so read on.
Solution: Open your build.gradle for your Project (not Module). Find the line classpath com.android.tools.build:gradle:xxx under dependencies where xxx is the Gradle Plugin version and make the update. Save and Rebuild your project. Here is the Android Gradle docs for managing your Gradle versions: https://developer.android.com/tools/revisions/gradle-plugin.html

I was able to get build to work with Build Tools 23.0.0 rc1 if I also opened the project level build.gradle file and set the version of the android build plugin to 1.3.0-beta1. Also, I'm tracking the canary and preview builds and just updated a few seconds before, so perhaps that helped.
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.3.0-beta1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}

Quick fix that worked for me:
Right click on project->"Open Module Settings"->Build Tools Version change to: 22.0.1

To build your application without aidl is missing error with compileSdkVersion 23 and buildToolsVersion "23.0.1" you should specify latest versions for Android Gradle plugin (and Google Play Services Gradle plugin if you are using it) in main build.gradle file:
buildscript {
repositories {
...
}
dependencies {
classpath 'com.android.tools.build:gradle:1.3.1'
classpath 'com.google.gms:google-services:1.3.1'
}
}

I had the same error i fixed it by going to the build.gradle (Module: app) and changed this line from :
buildToolsVersion "23.0.0 rc1"
to :
buildToolsVersion "22.0.1"
You will need to go the SDK Manager and check if you have the 22.0.1 build tools. If not, you can use the right build tools but avoid the 23.0.0 rc1.

Essentially Matt Daley/Johnny Mohseni's solution worked for me.
I faced exactly the same problem on a fresh Android Studio V 1.2.1.1 installation. I created a new project (blank activity) and straightaway god this build error.
Error:Execution failed for task ':app:compileDebugAidl'.
> aidl is missing
As suggested, changing the gradle dependency from 1.2.3 to 1.3.0-beta1 fixed it.
classpath 'com.android.tools.build:gradle:1.3.0-beta1' // <--- WORKS!
//classpath 'com.android.tools.build:gradle:1.2.3' // <--- default - failed
Once 1.3.0-beta1 change was saved, I got a prompt to upgrade dependencies. Upon accepting the request to upgrade, the gradle build status bar at the bottom tracked the packages being synced. When that completed, the build was automatically triggered and completed successfully.

Use your file browser and copy-paste the IInAppBillingService.aidl into /app/src/main/aidl/com/android/vending/billing/

The problem was actually in the version Android Studio 1.3 updated from the canary channel. I updated my studio to 1.3 and got the same error but reverting back to studio 1.2.1 made my project run fine.

buildtools layout in 23.0.0.rc2 was reverted
so to be able to use it, you need to upgrade the plugin to 1.3.0-beta2 or higher as i show below:

I am working with sdk 23.1.0 and gradle 1.3.1. I created a new project edited nothing and got the aidl error. I went into my project gradle file and changed tool to 22.0.1 instead of 23.1.0 and it worked:
compileSdkVersion 23
buildToolsVersion "22.0.1" //"23.1.0"

Check if you actually have installed the buildVersionTools you are using. In my case I tried 25.0.1 whilst I only had 25.0.2.
To check it go to the SDK Manager, clicking the icon:
Then click Launch Standalone SDK Manager at the bottom:
Now check whatever you need and install packages.
Hope it helps!

Pulled an Android project from GitHub. Android studio doesn't load "support.v7 library"

So my coworker uploaded a project to GitHub which i pulled. I expected everything to be okay, but for some reason it won't load v7 support library (it gives sqiggly red lines under the v7 import)
Does anyone know how to solve this?
EDIT:
build.gradle
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.6.+'
}
}
apply plugin: 'android'
repositories {
mavenCentral()
}
android {
compileSdkVersion 19
buildToolsVersion "19.0.0"
defaultConfig {
minSdkVersion 9
targetSdkVersion 19
}
}
dependencies {
compile 'com.android.support:appcompat-v7:19.0.0'
}

Make sure the Android Support Repository is installed in your SDK manager:

In eclipse, you have to import the support libraries into your workspace by clicking "file" "import" and then browsing to wherever the SDK lives on your computer ... adt-bundle-windows-x86_64-20131030>sdk>extras>android>support>v7 (for the root directory). Then some projects should appear in the "Projects to import" window. Select the ones you need and then select "finish". Once they are in your work space, select your project that needs them and right click it and select "properties". Then a window pops up. Select "Android" on the left and then in the bottom box select the v7 support libraries that you need and select "add", then "OK." Now you have to rebuild your project and the red squiggly lines should go away. Yay!

Unable to call Android Kitkat Class?

I am not able call KitKat class like when I am going to call Intent.ACTION_OPEN_DOCUMENT. I am getting a error
ACTION_OPEN_DOCUMENT cannot be resolved or is not a field
and for takePersistableUriPermission(Uri, int)
The method takePersistableUriPermission(Uri, int) is
undefined for the type ContentResolver

Double check that your project target build is using Android 4.4 (SDK 19), in Eclipse this can be done by:
Right clicking the project and click "Properties". Then select "Android" from the tree on the left. You can then select the target version on the right.
If you don't see 4.4 as an option, open up the SDK manager and make sure you have installed Android 4.4 KitKat

If you're using Android Studio and gradle build system it should automatically highlight it for you. Obviously is that you haven't indicated for compiler to use 19 version of sdk. Assuming you're using gradle you should add buildToolsVersion "19.0" and compileSdkVersion 19. Example of build.gradle:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:+'
}
}
apply plugin: "android"
android {
buildToolsVersion "19.0"
compileSdkVersion 19
}
After that don't forget to sync gradle settings: Tools -> Android -> Sync Project with Gradle Files
And as #Glenn-- has pointed - don't forget to update AndroidManifest.xml

Add support library to Android Studio project

I just installed the new Android Studio and I'm looking for a way to import the support library for Android.
Where is the option for that? In Eclipse that are just two clicks. I googled for it but found nothing. Surely it is too new.

=============UPDATE=============
Since Android Studio introduce a new build system: Gradle. Android developers can now use a simple, declarative DSL to have access to a single, authoritative build that powers both the Android Studio IDE and builds from the command-line.
Edit your build.gradle like this:
apply plugin: 'android'
android {
compileSdkVersion 19
buildToolsVersion "19.0.3"
defaultConfig {
minSdkVersion 18
targetSdkVersion 19
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:21.+'
}
NOTES: Use + in compile 'com.android.support:support-v4:21.+' so that gradle can always use the newest version.
==========DEPRECATED==========
Because Android Studio is based on IntelliJ IDEA, so the procedure is just same like on IntelliJ IDEA 12 CE
1.Open Project Structure (Press F4 on PC and Command+; on MAC) on your project).
2.Select Modules on the left pane.
3.Choose your project and you will see Dependencies TAB above the third Column.
4.Click on the plus sign in the bottom. Then a tree-based directory chooser dialog will pop up, navigate to your folder containing android-support-v4.jar, press OK.
5.Press OK.

I no longer work on Android project for a while.
Although the below provides some clue to how an android studio project can be configured, but I can't guarantee it works flawlessly.
In principle, IntelliJ respects the build file and will try to use it to configure the IDE project. It's not true in the other way round, IDE changes normally will not affect the build file.
Since most Android projects are built by Gradle,
it's always a good idea to understand this tool.
I'd suggest referring to #skyfishjy's answer, as it seems to be more updated than this one.
The below is not updated
Although android studio is based on IntelliJ IDEA, at the same time it relies on gradle to build your apk. As of 0.2.3, these two doesn't play nicely in term of configuring from GUI.
As a result, in addition to use the GUI to setup dependencies, it will also require you to edit the build.gradle file manually.
Assuming you have a Test Project > Test structure.
The build.gradle file you're looking for is located at TestProject/Test/build.gradle
Look for the dependencies section, and make sure you have
compile 'com.android.support:support-v4:13.0.+'
Below is an example.
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.5.+'
}
}
apply plugin: 'android'
repositories {
mavenCentral()
}
dependencies {
compile 'com.android.support:support-v4:13.0.+'
}
android {
compileSdkVersion 18
buildToolsVersion "18.0.1"
defaultConfig {
minSdkVersion 7
targetSdkVersion 16
}
}
You can also add 3rd party libraries from the maven repository
compile group: 'com.google.code.gson', name: 'gson', version: '2.2.4'
The above snippet will add gson 2.2.4 for you.
In my experiment, it seems that adding the gradle will also setup correct IntelliJ dependencies for you.

This is way more simpler with Maven dependency feature:
Open File -> Project Structure... menu.
Select Modules in the left pane, choose your project's main module in the middle pane and open Dependencies tab in the right pane.
Click the plus sign in the right panel and select "Maven dependency" from the list. A Maven dependency dialog will pop up.
Enter "support-v4" into the search field and click the icon with magnifying glass.
Select "com.google.android:support-v4:r7#jar" from the drop-down list.
Click "OK".
Clean and rebuild your project.
Hope this will help!

You can simply download the library which you want to include and copy it to libs folder of your project. Then select that file (in my case it was android-support-v4 library) right click on it and select "Add as Library"

In Android Studio 1.0, this worked for me :-
Open the build.gradle (Module : app) file and paste this (at the end) :-
dependencies {
compile "com.android.support:appcompat-v7:21.0.+"
}
Note that this dependencies is different from the dependencies inside buildscript in build.gradle (Project)
When you edit the gradle file, a message shows that you must sync the file. Press "Sync now"
Source : https://developer.android.com/tools/support-library/setup.html#add-library

Android no longer downloading the libraries from the SDK manager, it has to be accessed through Google's Maven repository.
You will have to do something similar to this in your build.gradle file:
allprojects {
repositories {
jcenter()
maven {
url "https://maven.google.com"
}
}
}
dependencies {
...
compile "com.android.support:support-core-utils:27.0.2"
}
Find more details about the setting up process here and about the different support library revisions here.

AndroidX[About]
implementation 'androidx.appcompat:appcompat:1.0.2'