App requires Multidex support in flutter?

user_17639277 0
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I'm getting this error while building my app in Flutter. it seems the problem that the multidex is not enabled even though I did everything needed to enable it. this the error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeProjectDexDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:
     Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.
     Type androidx.activity.R$attr is defined multiple times: C:\Users\Abdul rehman\OneDrive\Desktop\CSC451\Capstone Project\harfanah\build\app\intermediates\project_dex_archive\debug\out\4b5c628c7fbb96e2839e63f71f8803802c039de25c33dd9c9475187dc45e6e1a_1.jar:classes.dex, C:\Users\Abdul rehman\OneDrive\Desktop\CSC451\Capstone Project\harfanah\build\app\intermediates\project_dex_archive\debug\out\9bd7ed05083b8d3edbf142363966d832d9f0694faefda4d175e3ad8ad18fc06d_1.jar:classes.dex

* 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 30s
[!] App requires Multidex support
    Flutter multidex handling is disabled. If you wish to let the tool configure multidex, use the --mutidex flag.
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

I have already checked all of the solutions. enabled Multidex support and used the latest version:

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.harfanahApplication.harfanah"
        minSdkVersion 21
        targetSdkVersion 32
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled true
    }
.
.
.

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation("androidx.multidex:multidex:2.0.1")
}

I also added these to gradle.properies

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

Still it is not working. any suggestions?

android-multidex flutter gradle
3 Answers

Have you tried "flutter clean" and then rebuild? You can let the Flutter CLI tool do it for you with "flutter build --multidex".

user_129037020

use flutter clean and flutter pub get

then you will get a notification on whether you need to install it or not. type y (yes) to it .then use flutter run

user_173554470

I had the same issue on a Mac M1(2021). To debug on an android device, I extended @AntEdode's solution a bit:

flutter build apk --multidex --debug

During build, the same error will pop up, however the SDK will now ask whether or not you want to install multidex:

[!] App requires Multidex support
    Multidex support is required for your android app to build since the number of methods has exceeded 64k. You may pass the --no-multidex
    flag to skip Flutter's multidex support to use a manual solution.

    Flutter tool can add multidex support. The following file will be added by flutter:

        android/app/src/main/java/io/flutter/app/FlutterMultiDexApplication.java

Do you want to continue with adding multidex support for Android? [y|n]:

After confirmation - voila:

āœ“  Built build/app/outputs/flutter-apk/app-debug.apk.

To run on your emulator:

flutter run --multidex
user_40493370
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