Flutter problems: "Could not resolve all artifacts for configuration ':classpath' "

Question

I am trying to run a flutter app I am writing on my device but when I try to run, I never get past the "assembleDebug" stage and get this message in the terminal:

Launching lib\main.dart on SM N950U in debug mode...
Running Gradle task 'assembleDebug'...

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not find com.android.tools.build:gradle:5.6.2.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/5.6.2/gradle-5.6.2.pom
       - https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/5.6.2/gradle-5.6.2.jar
       - https://jcenter.bintray.com/com/android/tools/build/gradle/5.6.2/gradle-5.6.2.pom
       - https://jcenter.bintray.com/com/android/tools/build/gradle/5.6.2/gradle-5.6.2.jar
     Required by:
         project :

* Try:
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

BUILD FAILED in 14s
Finished with error: Gradle task assembleDebug failed with exit code 1

I have recently updated to gradle 6.0.1 (I assume I did that correctly but I am very new to all this) and there are no issues with flutter doctor.

Here is my project level build.gradle:

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:5.6.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.3'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Here is the app level build.gradle:

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 28

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

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.skypeclone1"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
apply plugin: 'com.google.gms.google-services'

Here are my Gradle wrapper properties in case they are also important.

#Fri Jun 23 08:50:38 CEST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

gradle.properties

org.gradle.jvmargs=-Xmx1536M
android.useAndroidX=true
android.enableJetifier=true
android.enableR8=true

Benjamin · Accepted Answer · 2019-12-26 00:02:29Z

25

You're trying to use actual Gradle. For Android development, there's Android Gradle which is currently on version 3.5.3 which came out this month. Read this article: https://developer.android.com/studio/releases/gradle-plugin#3-5-0.

EDIT: To use the latest version of Android Gradle (3.5.3), you need Gradle versions between 5.4.1-5.6.4 which you can configure in the gradle-wrapper.properties file. I guess Android Gradle doesn't yet support Gradle 6.

answered Dec 26, 2019 at 0:02

Benjamin

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7 Comments

Jude Harding Over a year ago

Hi, I changed the distribution ref in gradle-wrapper.properties and the project level back to 5.6.2 and am getting the same error. Is there a specific way to implement this change correctly?

Benjamin Over a year ago

Can you please update your post with your new files?

Benjamin Over a year ago

Set classpath 'com.android.tools.build:gradle:5.6.2' to classpath 'com.android.tools.build:gradle:3.5.3'

Jude Harding Over a year ago

Thank you so much! That fixed the initial error, but now I have another "failure to build" error. It says that the problem is in the app level gradle on line 24 (apply plugin: 'com.android.application'). The error reads: * What went wrong: A problem occurred evaluating project ':app'. > Failed to apply plugin [id 'com.android.application'] > Cannot parse project property android.enableR8='true ' of type 'class java.lang.String' as boolean. Expected 'true' or 'false'.

Benjamin Over a year ago

Follow these steps here: stackoverflow.com/a/54857699/10808802. You need to migrate to AndroidX properly

|

Danilo Rêgo · Accepted Answer · 2020-08-31 00:35:28Z

25

The problem probably was caused by updating the gradle. The Android Studio always asks you to update it, but don't do this for flutter apps. I had the same issue and I solved with the following versions:

On build.gradle module level:

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

On build.gradle app level:

compileSdkVersion 28
targetSdkVersion 28

On gradle-wrapper.properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

By the way, I got all those versions by creating a new flutter app on 1.20 stable version.

answered Aug 31, 2020 at 0:35

Danilo Rêgo

5696 silver badges4 bronze badges

2 Comments

MubarakZade Over a year ago

This is a really good workaround to fall back to the Flutter recommended Gradle. Thanks

oupoup Over a year ago

That was the one, I was missing the classpath attribute to Kotlin. Thank you deeply!

Richie · Accepted Answer · 2020-02-15 12:57:15Z

16

Sometime you need to run flutter pub upgrade.

answered Feb 15, 2020 at 12:57

Richie

5846 silver badges10 bronze badges

Comments

s_khan92 · Accepted Answer · 2020-04-14 09:55:45Z

11

I had problem that i was connected with VPN (Home Office) but once i disconnect VPN then it run. So, there was network problem.

answered Apr 14, 2020 at 9:55

s_khan92

9799 silver badges29 bronze badges

Comments

Mohi Dev · Accepted Answer · 2021-03-25 11:04:43Z

you can use this in you build.gradle

    buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
        maven {
            url 'http://storage.googleapis.com/r8-releases/raw'
        }
    }

    dependencies {
        classpath 'com.android.tools:r8:2.1.75'
        classpath 'com.google.gms:google-services:4.3.2'
        classpath 'com.android.tools.build:gradle:4.1.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

repleeka · Accepted Answer · 2021-06-03 08:43:54Z

1

Don't know about this question as it already accepted the answer.

If you are here after a recent flutter update(like me) then do the following.

If you have recently upgraded to a new flutter version

then you need to run flutter pub upgrade this will upgrade the

dependencies to the latest version accordingly.

Hope it solved your problem. Thank you!

answered Jun 3, 2021 at 8:43

repleeka

6201 gold badge6 silver badges16 bronze badges

Comments

toha · Accepted Answer · 2022-04-16 11:07:36Z

1

My flutter project require gradle upgrade and this error happened..

I try to solve this case and read this article.

I should not change build.gradle version. Just version at gradle-wrapper.properties

build.gradle file should like this as original :

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        //classpath 'com.android.tools.build:gradle:4.1.0' >> Original
        classpath 'com.android.tools.build:gradle:4.1.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

And I try run this at VS Code terminal :

cd android (go to android directory below project dir)
run : ./gradlew clean build

answered Apr 16, 2022 at 11:07

toha

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1 Comment

Behzod Faiziev Over a year ago

the link you shared contains viruses

ibrahim saputra · Accepted Answer · 2022-07-12 17:45:27Z

0

I tried to change kotlin version to the latest while the Gardle isn't compatible with it, so make sure

 //ext.kotlin_version = '1.6.21' this v not compatible with current gradle version
 ext.kotlin_version = '1.5.30' // this compatible
 dependencies {
    classpath 'com.android.tools.build:gradle:4.1.1'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 }

answered Jul 12, 2022 at 17:45

ibrahim saputra

4176 silver badges12 bronze badges

Comments

Amir Aghajani · Accepted Answer · 2022-07-16 04:54:36Z

0

In my case, path_provider package need gradle 3 and I was getting this error.

Could not resolve all artifacts for configuration ':path_provider_android:classpath'
Could not find gradle-3.3.0.jar (com.android.tools.build:gradle:3.3.0)

These changes solved my problem.

1- In android\build.gradle I changed gradle version from 4.1.0 to 3.6.4

classpath 'com.android.tools.build:gradle:3.6.4'

2- In android\gradle\wrapper\gradle-wrapper.properties I changed distribution url from gradle-6.7-all.zip to gradle-6.1.1-all.zip

distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip

answered Jul 16, 2022 at 4:54

Amir Aghajani

3872 silver badges5 bronze badges

Comments

Shiju Shaji · Accepted Answer · 2023-03-25 08:10:41Z

0

I had an issue of same sort i got the answer from this post solution it happens by the lint package blocking app release build from building hope it helps

answered Mar 25, 2023 at 8:10

Shiju Shaji

795 bronze badges

Comments

Sanjaya jena · Accepted Answer · 2023-11-06 15:01:34Z

0

Upgrade your gradle version to 11

answered Nov 6, 2023 at 15:01

Sanjaya jena

213 bronze badges

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