Develop Reference

Kotlin Not Configured : Android studio

I am able to run the project successfully. but unable to resolve this issue which is showing "kotlin Not Configured". I tried every solution for that but its always showing in the currently active file.
Please help.

Delete the .gradle and .idea file and restart the project. This seem to work for me.

Click on Tools -> Kotlin -> Configure Kotlin in Project
then choose the configurator, any one from:
Java with Gradle
Android with Gradle

try to upgrade the kotlin version in build.gradle file
ext.kotlin_version = '1.3.72'
also in the build.gradle app module file make sure implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
in the dependencies section ,
if you see at any time update the gradle option , do so

Furthermore, if you find a line
implementation "androidx.core:core-ktx:+"
in your build.gradle, you may see the warning message:
Avoid using + in version numbers, can lead to unpredictable and anrepeatable builds.
Click on "Replace with specific version", then the current installed version replaces the "+". (For example, "1.3.2")
In my case the "kotlin not configured" message and a lot of "errors" in the kotlin file disappeared.

Simply hitting "Sync Project with Gradle Files" did the job for me.

In my case, it can fix by keep the version of kotlin-gradle-plugin up to date. Check the version here: https://kotlinlang.org/docs/gradle.html#plugin-and-versions
File for configuration Location
Project -> build.gradle
//example: update this dependence:
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.10"
}

I faced the same issue after updating to latest android electric eel. So those of you who had a kotlin project which working fine and after update failed to sync gradle files or build projects with error
"Kotlin not configured".
I think this answer might help. I'm not sure if this is the right way to do but this was a life saver for me since I was working with an old project with older dependencies and kotlin version
Just click on the gradle offline toggle and try syncing the project and building it in offline mode. That's it !!!
No need to change any version or other changes. I hope this helps and save your time.

Cannot resolve symbol 'Theme' in styles.xml (Android Studio)

Since today, Android Studio can't find the AppCompat themes in styles.xml, but for example AppCompatActivity in code does get recognized. My Android Studio version is 2.2.2, Build #AI-145.3360264
I already tried upgrading to the latest build tools, compile sdk (25) version etc. but it didn't fix the problem.
At the moment I have installed the following (from sdk manager):
android api: 19 and 23
sdk platform tools: 25.0.1
sdk tools: 25.2.3
build-tools: 23.0.2 and 25.0.1
support repository: 40
google repository: 39
and a few others, that shouldn't be necessary to list here.
build.gradle of app:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion '25.0.1'
defaultConfig {
applicationId "xxx.xxxxxxxx.xxxxxxxxx" //not the real applicationId
minSdkVersion 14
targetSdkVersion 19
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug {
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile files('libs/RootTools.jar')
compile 'com.android.support:support-v4:23.+'
compile 'com.android.support:support-v13:23.+'
compile 'com.android.support:appcompat-v7:23.+'
compile 'com.android.support:design:23.+'
compile 'com.android.support:cardview-v7:23.+'
compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
compile 'de.hdodenhof:circleimageview:2.1.0'
}

Another solution that worked for me with Android Studio 3.1.2:
delete these from build.gradle if you have them:
'com.android.support:appcompat-v7:27.1.1'
'com.android.support:design:27.1.1'
then sync,
then undo delete,
then sync again.

I encountered this after updating to Android Studio 3.1.
None of the other answers listed here worked for me, however when I switched my appcompat support lib version to the latest 28.0.0-alpha1 then back to 27.1.0 that it was on before, it worked.
Seems the new version of Android Studio lost connection to where the library was synced to and just needed to have it reset.

No need to change anything.
Just press small button on top "Sync Project with Gradle Files"

EDIT: As #Alexey noted, bug still appears in Android Studio v3.1.4
This worked for me:
Click File > Close Project
Reopen the project from Studio's dialog.

That's because of feature called "build cache" that is enabled by default in build Android Plugin since 2.3.0.
It creates files in build cache outside of project folder (in my case -- in \Users\%username%\.android\build-cache)
Theese files are intended to be common between your projects.
And then Android Studio is unable to navigate in theese files.
That's all.
If you want to disable Build Cache, add android.enableBuildCache=false to gradle.properties file. Then restart Android Studio.
more info here:
https://developer.android.com/studio/build/build-cache.html#disable_build_cache

I have had the same problem. The only solution that worked for me was to manually delete the support libraries in file system and sync the project to let Android Studio download them again.
Steps:
Go to your project folder in File system
Go to .idea\libraries
Delete all the Gradle__com_android_support_****.xml files
Open Android Studio
Select File > Sync with File System
Once that is done, Select File > Sync Project with Gradle Files
Build Project
And now your error should be gone!!!

you can hit file -> invalidate Caches / Restart ... if it doesn't fix the issue you can close the project (file-> close project) and import it (file -> new -> import project.

I switched support lib to version 27.1.1 and problem has been solved. Seems like some bug in 27.1.0

I went through the same problem when I upgraded to alpha-2.
I looked at this link: http://tools.android.com/recent, but the only thing that worked well was:
Change this:
Classpath 'com.android.tools.build:gradle:2.3.0-alpha2'
For this:
Classpath 'com.android.tools.build:gradle:2.2.3'
In your build.gradle (Project)

Only this worked for me
Close project (File> Close Project)
Import / Re-Open project again (NOT from Recent)
Error should be resolved now.
If that fails, try below-
Open build.gradle, remove appcompact-v7 dependency and sync project.
Add appcompact-v7 dependency and sync.

I encountered same problem like this.Just the difference is I was using Studio 2.2.3. This is what solved my problem:
In my project level gradle I had:
classpath 'com.android.tools.build:gradle:2.3.0-alpha2' (which was a result of updating studio)
which I replaced with:
classpath 'com.android.tools.build:gradle:2.2.3'
I think you should look for a compatible classpath for your gradle configuration.

I was having the same issue after linking Firebase to my app. Updating the build.gradle in the app module did the trick, updated to:
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.google.firebase:firebase-database:11.8.0'

I had also the same problem when I upgraded my android studio from 2.2.2 to 2.3 Canary Version.
Although the new beta version of 2.3 is released yet it is using the gradle plugin of 2.2.3 which is of stable version.
So just change the classpath dependency in buildscript of build.gradle project level from alpha to 2.2.3 and sync it. It'll resolve the issue or change to the more appropriate version with respect to your channel version.
More on gradle watch this Gradle Recipes for android Ken Kousen - Gradle Summit 2016
https://www.youtube.com/watch?v=4L6wHTVmxGA

In newer versions of Android Studio, we are asked to use 'AppCompat'. Some users uncheck that and still use the Theme.AppCompat. That makes up this error. Same happened with me.
Solution is to add this line in your build.gradle (app).
compile 'com.android.support:appcompat-v7:26.1.0'

#Daniel Wilson made a comment in one of the answers that solved this issue for me. I wanted to add add as an answer to draw more attention to this solution.
Updating compileSdkVersion and targetSdkVersion from 26 to 27 (and then of course updating the dependencies) eliminated the errors for me.

Mine was fixed by deleting the .gradle file from the folder and re-importing the project in Android Studio

I also faced the problem with Android Studio 3.1 , syncing does not help me.
Then I switched back to
`'com.android.support:design:27.1.0'` from : `'com.android.support:design:27.1.1'`
and added android.enableBuildCache=false to gradle.properties to disable build cache

This is weird, I encounter this problem as below:
Android Studio is 3.1.2
support lib version is 27.0.0
I solve this by below:
change support lib version to 27.1.0, and "Sync Project with Gradle Files", then this error disappear
change support lib version to 27.0.0，and "Sync Project with Gradle Files", then this error not appear again

Deleted .idea and .gradle from project folder.
Then sync with gradle files, it worked.

I ran into the same problem when updating the Android Studio software.
What I did was this:
Go to the Gradle Settings as follows (this path is for Mac, but should be similar on Windows):
Android Studio -> Preferences -> Build, Execution, Deployment ->
Gradle.
Then pick "Use default gradle wrapper (recommended)".
If you already have that option chosen then your problem must lie somewhere else.

I changed my gradle version from
classpath 'com.android.tools.build:gradle:2.3.0'
to
classpath 'com.android.tools.build:gradle:2.2.3'
and it works now!

In Android Studio 3.1.3, the simple work around:
"Sync Project with Gradle Files"

If none of these methods mentioned by other contributors does not work for you..
Then please simply ignore this...
Even flutter officials also said to ignore these errors..
Caution*** Only ignore after trying all the methods.If above methods solve your errors then fine otherwise you can ignore these..
This type of errors happen after installing latest version of flutter sdk,gradle ,android studio and other plugins -packages
If you are using latest version then you have to ignore these errors.

Unable to find module with Gradle path. Linking to library -unspecified instead

Update 2 This has been fixed in Android Studio 1.2 Beta 3
Update: This has reportedly been fixed in an upcoming release of Android Studio.
In Android Studio 1.2 Beta 2 I started getting the following warnings when syncing Gradle.
Failed to set up dependencies
Warning:Unable to find module with Gradle path ':Library1'. Linking to library 'Library1-unspecified' instead.
Warning:Unable to find module with Gradle path ':Library2'. Linking to library 'Library2-unspecified' instead.
I've noticed that jumping to a declaration declared in one of the library modules pulls up the Decompiler instead of just going to the actual source in the library module.
In my Android Studio Project I have the following modules:
- App
- Library1
- Library2
Module: App build.gradle snippet:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile project(':Library1')
compile project(':Library2')
}
settings.gradle file:
include ':App'
include ':Library1'
include ':Library2'
project(':Library1').projectDir = new File(settingsDir, '../library1/lib')
project(':Library2').projectDir = new File(settingsDir, '../Library2/lib')

I faced this with Android Studio 2.2.3. The problem was with the .iml file that was causing the problem.
After importing the module folder into the project directory and adding the changes to include module in settings.gradle, delete the .iml file from the module folder and do a Gradle Sync. Then right click on any module in the Project Window and click on "Configure Project Subset...", if the imported module is not checked, check it and Android Studio should do a Gradle Sync. By then the imported module will appear in the Project Window and will have a .iml file regenerated that is does not cause any issues.

delete the .iml file under the error module.
restart Android studio

Right click project, Select "Configure Project Subset ..." and select your module, rebuild your project.

I met the same problem on AS 2.0 preview,
and I fixed it by following steps:
1.Rename the module.
2.Change the names in app/build.gradle and setting.gradle.
3.Start gradle sync.
I don't know why but it works on my issue.

Check in settings. of your app.
Down there is the field "Load/Unload Modules"
Your module might be unloaded, that's why Android Studio ignores it even if you specify it in Gradle.
At least that was the problem for me.

If you are using React-native>60, then you should run npx jetify on root of your project before doing Gradle sync.

For me the following worked in Android Studio 3.5.3
First of all, check if the path is correct in your Gradle settings.
If the path is correct then invalidate caches & restart by navigating to the top 'File' menu

It is a known bug introduced in 1.2 Beta 2.
See This issue on the Android issue tracker. Fix should be out within hours.

I had this problem and solved it by clicking on
File> Ivalidate cache / Restart...
as shown below:

Problem:
This problem can also occur when you change the path to the module.
settings.gradle
include ':app', ':filechooserlibrary'
project(':filechooserlibrary').projectDir = new File('../../repos-github/file-chooser/file-chooser-library/filechooserlibrary')
I changed the path to '../../github/file-chooser/file-chooser-library/filechooserlibrary'
The old path did not exist any more. But then, instead of accepting the new path, Android Studio recreated the old path structure thus referring to an empty directory.
Solution:
So, I deleted this obsolete path structure and restarted Android Studio, after deleting the .iml file (I don't know if this is necessary, but it cannot do harm). Then I reimported the Gradle project and it worked.

Try using an updated version of NDK.
I faced the same issue.
I was using NDK version r17c. Issue solve after using r21e.
Android Studio Version: 4.1.3
OS: Ubuntu 18.04.5

New to intellij android studio, can't open sample projects without Gradle error

i just switched to intellij and pretty new to android development.. I've been working on one app for 5 moth and now that i moved it to intellij android studio my options menus became invisible. I've been reading a lot and trying to catch up with newest features that are available now today.
By biggest pain is that im hitting this error ->
Failed to refresh Gradle project 'ActionBarCompat-ListPopupMenu' You are using Gradle version 1.8, which is not supported. Please use version 1.9. Please point to a supported Gradle version in the project's Gradle settings or in the project's Gradle wrapper (
I did search on this problem and some pages suggesting changing classpath to soething like
build:gradle:0.7.+ but that doest help..
What am i doing wrong? All i need is just to make those examples from android to work..
Thanks

The Gradle wrapper file is at the path (project-root)/gradle/wrapper/gradle-wrapper.properties. The distributionUrl property is where you set the Gradle version; it's embedded in the URL:
distributionUrl=http\://services.gradle.org/distributions/gradle-1.9-all.zip

First make sure you've updated to the newest Android SDK Build-tools version, the most current one is 19.0.3; if you haven't, then open the Android SDK manager and update.
Then look in the build.gradle file inside your project folder (not the one in the root folder). This first couple of lines should resemble something like this:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.9.+'
}
}
Set the class path to com.android.tools.build:gradle:0.9.+.
Then further along in the same file:
android {
compileSdkVersion 18
buildToolsVersion "19.0.3"
...
}
Set buildToolsVersion to 19.0.3 (the newest version).
Make sure Android Studio syncs the Gradle file changes. If it doesn't, restart Android Studio and/or rebuild the project. Then you should be good to go.

I think i figured this out.. Big thanks to Scott and Jaap.
I did updateof my intellij to 0.5.2, also i installed 19.0.3 ( newest build tools).
On few of the existing projects i had to change distributionUrl to
distributionUrl=http\://services.gradle.org/distributions/gradle-1.11-all.zip
After rebuilding the project it worked like a charm.

Just a note to say : Scorr Berba's reply was probably the correct one. Also I'm not sure 1.11 can be used - I used the wrapper (there is a lot of confusion here : the wrapper is the gradlew ["gradle*w*"rapper] to set the gradle used for my samples to 1.10 and you must set up your project to use the wrapper OR you can build from the command line e.g "./gradlew build".

Android Studio: Are Library Project dependencies picked from project.properties?

I have imported my project from ADT and after going to "Module Settings" and editing dependencies things are working fine.
My "build.gradle" has dependencies block empty, So I am wondering from where is Ansdroid-Studio picking libraries dependencies ? As I migrated from eclipse so I have project.properties file in module directory. Does Android-studio pick these things from "project.properties" file ?

Android Studio's default project support is done through Gradle, unless you have an Android project coming from IntelliJ which you can open with Studio as well.
If you use Gradle, project.properties is completely ignored. You should not use the Module Settings to add dependencies now as it only changes the IDE but not the Gradle based build system (we'll fix this in later versions).
If you have missing dependencies in your build.gradle, it may be due to a bug in the export from ADT. We have fixes for this coming soon.

Probably not, since a new project on Android Studio does not generate a project.properties file.
Presumably in Android Studio that is not where dependencies are coming from, but I can't be too sure.