Error when I'm trying to build an android app using flutter

Question

The error is the following:

e: /Users/Houssame/.gradle/aches/transforms-3/e5c5aa35234c44d5264fd87af440dbf9/transformed/fragment-1.7.1-api.jar!/META-INF/fragment_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.8.0, expected version is 1.6.0.

[!] Your project requires a newer version of the Kotlin Gradle plugin.
Find the latest version on https://kotlinlang.org/docs/releases.html#release-details, then update the │ version number of the plugin with id "org.jetbrains.kotlin.android" in the plugins block of
/Users/Houssame/Desktop/demo 3/android/settings.gradle.
Alternatively (if your project was created before Flutter 3.19), update
/Users/Houssame/Desktop/demo 3/android/build.gradle
ext.kotlin_version = ''

I did upgrade all the version for Gradle but I have the same error, the app is ruining normally in emulator Android Studio.

Android/build.gradle

buildscript { ext.kotlin_version = '2.0.20' repositories { google() mavenCentral() }

dependencies { classpath 'com.android.tools.build:gradle:7.4.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" classpath 'com.google.gms:google-services:4.4.2' } }

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

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

tasks.register("clean", Delete) { delete rootProject.buildDir }

Android/app/build.gradle

plugins { id "com.android.application" id 'com.google.gms.google-services' id 'kotlin-android' id "dev.flutter.flutter-gradle-plugin" }

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

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

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

android { namespace = "com.Inventory.App" compileSdk = 34 ndkVersion = flutter.ndkVersion

compileOptions { sourceCompatibility = JavaVersion.VERSION_1_8 targetCompatibility = JavaVersion.VERSION_1_8 }

kotlinOptions { jvmTarget = '1.8' }

defaultConfig { applicationId = "com.Inventory.App" minSdk = 21 targetSdk = 34 versionCode = flutterVersionCode.toInteger() versionName = flutterVersionName }

buildTypes { release { signingConfig = signingConfigs.debug } } }

flutter { source = "../.." }

dependencies { implementation 'androidx.core:core:1.10.0' implementation 'androidx.appcompat:appcompat:1.6.1' implementation 'com.google.android.material:material:1.11.0' }

Android/settings.gradle

pluginManagement { def flutterSdkPath = { def properties = new Properties() file("local.properties").withInputStream { properties.load(it) } def flutterSdkPath = properties.getProperty("flutter.sdk") assert flutterSdkPath != null, "flutter.sdk not set in local.properties" return flutterSdkPath }()

includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")

repositories { google() mavenCentral() gradlePluginPortal() } }

plugins { id "dev.flutter.flutter-plugin-loader" version "1.0.0" id "com.android.application" version "7.3.0" apply false id "com.google.gms.google-services" version "4.3.15" apply false id "org.jetbrains.kotlin.android" version "2.0.20" apply false }

include ":app"

Thank you!

Answer 1

Copy these as they are: edit your aplicationId and namespace to match your applicationId

**android/app/build.gradle**

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

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

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

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

android {
    namespace = "xxxxx"
    compileSdk = 34
    ndkVersion = "26.1.10909125"

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

    defaultConfig {
        applicationId "xxxxxxxx"
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion 34
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies { 
    implementation 'androidx.core:core:1.10.0' 
    implementation 'androidx.appcompat:appcompat:1.6.1' 
    implementation 'com.google.android.material:material:1.11.0' 
}

**android/build.gradle**
buildscript { 
    ext.kotlin_version = '1.9.20' 
    repositories { 
        google() 
        mavenCentral() 
        }

dependencies { 
    classpath 'com.android.tools.build:gradle:7.4.2'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" 
   
    }
}

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

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

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

**android/setting.gradle**
pluginManagement {
    def flutterSdkPath = {
        def properties = new Properties()
        file("local.properties").withInputStream { properties.load(it) }
        def flutterSdkPath = properties.getProperty("flutter.sdk")
        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
        return flutterSdkPath
    }()

    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")

    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
    }
}

plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "8.5.0" apply false
    id "org.jetbrains.kotlin.android" version "1.9.20" apply false
}


include ":app"


**your gladle-wrapper.properties**
distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-all.zip

Answer 2

try flutter clean delete folder inside android/gradle And try to build again. if didn't worked try downgrading kotlin version to 1.7.10 or 1.8.0