Message "error: resource android:attr/lStar not found"

Question

A Flutter Android app I developed suddenly compiled wrong today.

Error:

What went wrong:

Execution failed for task ':app:processDebugResources'.

Android resource linking failed /Users/xxx/.gradle/caches/transforms-2/files-2.1/5d04bb4852dc27334fe36f129faf6500/res/values/values.xml:115:5-162:25: AAPT: error: resource android:attr/lStar not found.

error: failed linking references.

I tried

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

Get more help at https://help.gradle.org

The build failed in 16 seconds.

Did you find any fix yet? I am facing the same issue. I just tried to re-run my app and everything went wild since then. let me know if you got an answer for this fix. — farhan riaz, Sep 02 '21 at 15:37
https://stackoverflow.com/questions/69021225/resource-linking-fails-on-lstar — Eduardo Carminati, Sep 03 '21 at 12:18
I would just like to say that this is one of the things that I find SO frustrating with Android development. I opened a brand new project, with the intention of making a simple app with a web view. I added no other code other than the web view. It won't compile because of this error. What a HUGE waste of my time. Especially since I have tried everything this thread and nothing is working. — durbnpoisn, Dec 01 '21 at 11:44

Nitrix · Answer 1 · 2021-10-01T07:33:09.700

For those who have this issue in a Cordova application context like me and using an Android API version older than 31 (29 in my case), I found a clean way to bypass it.

TL;DR

If you are using the plugin cordova.plugins.diagnostic, uninstall it first then reinstall it using the following argument:

cordova plugin add cordova.plugins.diagnostic --variable ANDROIDX_VERSION=1.0.0

Refresh the whole android platform and you're project should not be using the androidx.core:core:1.7.0-beta02 anymore.

Full explaination

Solutions already mentionned in the thread (gradle rules to force a certain version of a package) will not work with Cordova as it handles the whole gradle process on it's own (gathering plugins dependencies, config.xml settings and processing everything) and it's really difficult to override specific things. I did not manage to fix our problem using resolutionStrategy for example.

And migrating to Android API 31 isn't always an easy solution (plugins & dependencies need to support it in particular)

Instead, I tried to find which of my installed plugins were having a dependency linked to the androidx.core:core package, which breaks everything in its 1.7.0-beta02 version.

No one in my list was directly using it, but I found (with the help of the builded build.gradle) that the following package androidx.appcompat:appcompat was used and since it's related to AndroidX as well, I digged a bit and I quickly found-out that the version used for it was 1.+ (latest 1.xx).

Checking on mavenrepo, androidx.appcompat:appcompat has our buggy package androidx.core:core as dependency (1.7.0-beta02 on the latest).

After a quick search with my IDE, I found the definition of the dependency :

<framework src="androidx.appcompat:appcompat:$ANDROIDX_VERSION" />

It was used by a plugin named cordova-diagnostic-plugin. (Pretty common in a Cordova project, it basically handles Android settings, permissions and hardware stuff)

I noticed that an environment variable was used to define the package version (and set by default to 1.+). Going on the plugin's GitHub documentation : https://github.com/dpa99c/cordova-diagnostic-plugin#androidx-library will tell you that you can indeed set a custom version when installing the plugin with the Cordova command.

Which I did (I removed the plugin first):

cordova plugin add cordova.plugins.diagnostic --variable ANDROIDX_VERSION=1.0.0

After rebuilding the android platform, I started a new build and it was finally successful !

androidx.appcompat:appcompat:1.0.0 was used as well as the androidx.core:core package in its 1.0.0 version. No more error: resource android attr/lStar not found issue !

To sum-up : check your plugins dependencies and if possible, set static versions instead of "latest". In that way, you can (in most cases) avoid using alpha/beta releases, which could be instable or not supporting your current environment.

It worked other options. Upgrade to API level 30 by setting defaultTargetSdkVersion & defaultCompileSdkVersion to 30, or by using configurations.all { resolutionStrategy { force 'androidx.core:core:1.6.0' force 'androidx.core:core-ktx:1.6.0' } } — San, Sep 30 '21 at 21:00
Thanks a lot, I had already investigated this error for 3 hours when I found your answer and worked perfectly. I wanted to thank you yesterday but I had too much to do, so I took the first free time I got to do it! Thank you for sharing! — Armando Peña, Oct 01 '21 at 15:49
This answer really deserves more hits. To be frank, firstly I ignore this answer but after trying other solutions for two days read your answer carefully and follow the step and its working!!!!!:) thank you, Nitrix. — gautamsinh mori, Oct 06 '21 at 07:58
Should be accepted answer, For my case I don't want to upgrade to target / compile SDK versions so I just kept 1.0.2 to both 'androidx.appcompat:appcompat:1.0.2' and 'androidx.core:core-ktx:1.0.2' — Waheed Nazir, Mar 17 '22 at 06:46

score 30 · Answer 2 · edited Sep 09 '21 at 09:04

30

I did this for solving it in my Flutter application.

Open the android/app project
Search the text androidx.core:core-ktx:+ in all solutions. In most cases this is found in build.gradle file.
If you found this text in some dependency, change androidx.core:core-ktx:+ to androidx.core:core-ktx:1.6.0
Sync and run again

In my case, I had this problem with the audioplayers: ^0.17.3 dependency. The + sign was causing the error.

edited Sep 09 '21 at 09:04

Ashish garg

3
1

answered Sep 02 '21 at 20:43

Maikol Bonilla Gil

560
1
5

2

Still facing the same issue tried your hack as well – farhan riaz Sep 03 '21 at 05:58
1

I have the same issue and its gone when I remove the audioplayers dependency. None of the fixes described here worked for me. Still stuck on this. – novas1r1 Sep 07 '21 at 08:03
If you're using `audioplayers`, update it to `^0.20.0` in your pubspec.yaml. That's what fixed it for me. See discussion here: https://github.com/luanpotter/audioplayers/issues/999 – troyshu Sep 08 '21 at 14:46
Thank you, you saved me from invalidating the cache for 6th time! – Top4o Dec 13 '21 at 07:09

Saurabh Kumar · Accepted Answer · 2021-09-20T21:04:08.843

26

Using the answer from here Update compileSdkVersion and targetSdkVersion to 31

And add this code snippet in your android/build.gradle file at the very end.

configurations.all {
    resolutionStrategy {
        force 'androidx.core:core-ktx:1.6.0'
    }
}

Just recently the original author of audioplayers package fixed this issue in his recent PR. It has been fixed in audioplayers version 0.20.1, so if your issue is related to audioplayers, do upgrade.

edited Sep 20 '21 at 21:04

answered Sep 03 '21 at 21:03

Saurabh Kumar

1,313
10
15

6

my problem solved when i upgrade to targetSdkVersion 31 – Pir Fahim Shah Dec 20 '21 at 11:18
1

This is also what solved it for me +1 – Sugoi Reed Feb 07 '22 at 14:13

score 18 · Answer 4 · answered Dec 08 '21 at 00:32

18

I received this error in Android Studio when I created a new Android application. The latest versions of BOTH appcompat and core-ktx in dependencies appear to be the issue.

Open build.gradle, and look in dependencies
Roll back appcompat to 1.3.0
Roll back core-ktx to 1.6.0

Tap "Sync Now" (should be in the top right)

dependencies {
  ...

  //implementation 'androidx.appcompat:appcompat:1.4.0'
  //implementation 'androidx.core:core-ktx:1.7.0'

  implementation 'androidx.appcompat:appcompat:1.3.0'
  implementation 'androidx.core:core-ktx:1.6.0' 

 ...
}

Rerun your program and cross your fingers.

answered Dec 08 '21 at 00:32

iOS_Mouse

573
5
12

1

This worked for me, I was updating an older application that was using SDK 29 and appcompat v1.0.0. Updating to latest appcompat (1.4.1 at the time) gave me the lstar error. I didn't even have core-ktx referenced at all, but adding it seems to have fixed my issue. – jackofallcode May 17 '22 at 09:42
for me worked app compat version is 1.2.0 – Willey Hute May 27 '22 at 17:59

score 17 · Answer 5 · answered Sep 02 '21 at 19:05

17

Are you using the @react-native-community/netinfo library? You need to refresh this library if you are using it.

After updating or uninstalling and reinstalling the netinfo library it will work.

answered Sep 02 '21 at 19:05

Kadir Akbulut

170
5

Seems not working after updating the netinfo package. – Richardson. M Sep 02 '21 at 20:07
This question is about a cordova app, so this answer does not apply. That said, I was having this problem on a react-native app, and ended up on this question. Upgrading `@react-native-community/netinfo` _did_ resolve my issue. – CoatedMoose Oct 22 '21 at 19:51

score 10 · Answer 6 · answered Oct 14 '21 at 15:59

The solution for this error may change according to the platform which we are using for building the application.

For Cordova,

Reinstall cordova.plugins.diagnostic plugin

cordova plugin add cordova.plugins.diagnostic --variable ANDROIDX_VERSION=1.0.0

For React Native,

Reinstall @react-native-community/netinfo library

For Android Studio,

Specify specific or stable version of android core dependency in build.gradle(app) file.

dependencies {
    ...
    implementation "androidx.core:core-ktx:1.6.0"
}

This was the solution i was looking for. – Ali Sari Nov 30 '21 at 10:07 — Ali Sari, Nov 30 '21 at 10:07

Karthik Kompelli · Answer 7 · 2021-09-24T12:36:57.253

8

remove dynamic version in project dependencies in all build.gradle files

example:

"androidx.core:core-ktx:+"

remove + or ^ operator in dependencies { } and mention specific version or stable version

"androidx.core:core-ktx:1.6.0"

source : https://flutter.dev/docs/development/packages-and-plugins/using-packages

edited Sep 24 '21 at 12:36

answered Sep 24 '21 at 11:48

Karthik Kompelli

1,827
1
15
21

You saved my life! – Mekey Salaria Sep 30 '21 at 08:45

Bhavesh Chand · Answer 8 · 2021-12-27T06:07:23.880

8

I got the same error

C:\Users\pc.gradle\caches\transforms-2\files-2.1\7a25962662620ee4f1493c07e779c7ef\core-1.7.0\res\values\values.xml:105:5-114:25: AAPT: error:

resource android:attr/lStar not found.

fix this issue by =

replacing compileSdkVersion 30 in build.gradle

to

compileSdkVersion 31

edited Dec 27 '21 at 06:07

answered Dec 27 '21 at 05:52

Bhavesh Chand

215
4
5

Got this err when upgrading androidx fragments and appcompat to 1.4.1. This fixed it. – FrankKrumnow Mar 07 '22 at 09:21

score 7 · Answer 9 · answered Dec 09 '21 at 13:07

7

Major source of this issue is appcompat library. As a quick fix to run your project you can use appcompat version below 1.4.0 that is you can switch to appcompat version

implementation 'androidx.appcompat:appcompat:1.3.0'

or below.

answered Dec 09 '21 at 13:07

Mudit Goel

71
1
3

score 3 · Answer 10 · answered Sep 15 '21 at 16:44

3

Add the following to your Project build.gradle:

buildscript {
  ext {
    androidXCore = "1.6.0"
    
  }
}

answered Sep 15 '21 at 16:44

user1829870

83
1
7

score 3 · Answer 11 · answered Sep 30 '21 at 11:51

3

If anyone is facing the same issue in ionic cordova, remove these plugin

cordova-plugin-androidx
cordova-plugin-androidx-adapter

And also any plugins dependent on them.

answered Sep 30 '21 at 11:51

Shivakumar N.R

152
1
11

Why is that? Deprecated? – Oussama Essamadi Sep 30 '21 at 14:21
I am having this issue with ionic cordova right now, can you explain more about it? – Armando Peña Sep 30 '21 at 20:09
cordova-plugin-androidx is deprecated as it's no longer required since cordova-android@9 adds built-in support for AndroidX. This plugin is only needed if your project uses legacy cordova-android@8. – Ivan Zandonà Oct 01 '21 at 13:58

score 3 · Answer 12 · edited Nov 19 '21 at 06:39

3

I removed implementation androidx.core:core:1.7.0, the project did not depend on it, and now everything is OK.

edited Nov 19 '21 at 06:39

Yunnosch

24,749
9
40
51

answered Nov 14 '21 at 18:15

Bokili Production

133
8

score 3 · Answer 13 · answered Dec 24 '21 at 18:20

3

I resolved this issue by changing these compileSdkVersion 31, targetSdkVersion 31 and classpath 'com.android.tools.build:gradle:4.0.2'

answered Dec 24 '21 at 18:20

Waheed Nazir

494
6
10

1

What do you change them to, and from what? – TheRealChx101 Jan 05 '22 at 16:08
Inside app build.gradle change compileSdkVersion and targetSdkVersion to 31 and inside project level build.gradle update com.android.tools.build:gradle to 4.0.2 – Waheed Nazir Feb 07 '22 at 04:58

score 1 · Answer 14 · edited Nov 19 '21 at 06:38

1

For Cordova
Uninstall cordova.plugins.diagnostic and cordova-plugin-androidx by running

cordova plugin remove cordova.plugins.diagnostic
cordova plugin remove cordova-plugin-androidx

edited Nov 19 '21 at 06:38

Yunnosch

24,749
9
40
51

answered Oct 23 '21 at 09:25

Akudo Silas

11
2

score 1 · Answer 15 · answered Mar 23 '22 at 14:37

1

I solved this problem by down grading my androidx.test.espresso:espresso-core from

androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

to

androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

answered Mar 23 '22 at 14:37

Bouchra

11
1

score 1 · Answer 16 · answered Apr 07 '22 at 14:58

this issue appeared with me in flutter and solved it thanks to this answer https://issuetracker.google.com/issues/199180389#comment2 just adding the following to the bottom of our app/build.gradle seemed to work for us while our compileSdkVersion and targetSdkVersion remained at 29:

 configurations.all {
   resolutionStrategy {
     force 'androidx.core:core:1.6.0'
     force 'androidx.core:core-ktx:1.6.0'
   }
 }

score 0 · Answer 17 · answered Oct 15 '21 at 06:29

Sorry I cannot comment as I just created an account. Thanks to Nitrix and Codemaker for the hints.

This is the complete list of commands in Ionic just to add to Codemaker's answer to get rid of the not found error

Android resource linking failed /Users/xxx/.gradle/caches/transforms-2/files-2.1/5d04bb4852dc27334fe36f129faf6500/res/values/values.xml:115:5-162:25: AAPT: error: resource android:attr/lStar not found.

npm uninstall cordova.plugins.diagnostic
rm -rf plugins/
rm -rf node_modules/
rm -rf package-lock.json
delete from package.json if diagnostic is still somewhere
npm install
ionic cordova platform rm android
cordova plugin add cordova.plugins.diagnostic --variable ANDROIDX_VERSION=1.0.0 //　This probably cause an error if Capacitor is used or even lately it also causes error with Cordova, so just use the command below
npm install cordova.plugins.diagnostic --variable ANDROIDX_VERSION=1.0.0
npm install @ionic-native/diagnostic
ionic cordova platform add android
ionic cordova build android

I hope that this will help a bit.

score 0 · Answer 18 · answered Dec 02 '21 at 18:43

0

comment this line in build.gradle

dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"])
//implementation 'androidx.appcompat:appcompat:1.4.0'

that work's for me

answered Dec 02 '21 at 18:43

Marvel Alvarez

27
2

score 0 · Answer 19 · answered Dec 14 '21 at 08:56

I've had this happen a few times and it always happens when I upgrade my dependencies.

I solved this each time by updating the following items in my gradle files to the latest versions:

compileSdk
targetSdk
compileSdkVersion
buildToolsVersion

The buildToolsVersion has always been the one that has caused the problem.

score 0 · Answer 20 · answered Dec 26 '21 at 06:08

0

when craete new project: select Use legacy android.support librares

answered Dec 26 '21 at 06:08

sadegh salehi

1
1
2

This does not really answer the question. If you have a different question, you can ask it by clicking [Ask Question](https://stackoverflow.com/questions/ask). To get notified when this question gets new answers, you can [follow this question](https://meta.stackexchange.com/q/345661). Once you have enough [reputation](https://stackoverflow.com/help/whats-reputation), you can also [add a bounty](https://stackoverflow.com/help/privileges/set-bounties) to draw more attention to this question. - [From Review](/review/late-answers/30673805) – Anatolii Shuba Dec 29 '21 at 05:24

score 0 · Answer 21 · answered Feb 16 '22 at 18:04

build.gradle (project)

buildscript { dependencies { classpath 'com.android.tools.build:gradle:4.0.2' } }

build.gradle (:app)

android { 
    compileSdkVersion 31
    defaultConfig {
        minSdkVersion 23
        targetSdkVersion 31
    }
    
}

dependencies { 
    def core_version = "1.7.0"

    // Java language implementation
    implementation "androidx.core:core:$core_version"
    // Kotlin
    implementation "androidx.core:core-ktx:$core_version"
}

Keep the same configuration of the app module for the feature modules so as not to generate inconsistencies.

GL

score 0 · Answer 22 · answered Feb 21 '22 at 22:50

0

I solved this problem by down grading my appcompat lib from

implementation 'androidx.appcompat:appcompat:1.4.1'

To

implementation 'androidx.appcompat:appcompat:1.1.0'

answered Feb 21 '22 at 22:50

Junaid

35
3

1

downgrade to version 1.3.1 – Imran Shafqat Apr 22 '22 at 20:30

score 0 · Answer 23 · answered Apr 12 '22 at 04:32

0

All you have to do is go in build.gradle and erase the entire line:

implementation "androidx.core:core-ktx:+"

super easy

answered Apr 12 '22 at 04:32

Alexander Dejesus

1

Hi there, please edit your answer with proper code formatting. You can follow the answer in this link https://meta.stackoverflow.com/questions/251361/how-do-i-format-my-code-blocks – dpacman Apr 12 '22 at 08:34