Flutter Android build fails with Workmanager plugin - kotlin version conflict

Question

I'm developing a Flutter app that uses the workmanager plugin for background tasks. The app works fine on iOS, but I'm encountering build issues on Android. Here's my setup:

Flutter Workmanager Build Issue on Android

Environment:

Flutter Version: 3.x
Workmanager Plugin: ^0.5.0
Kotlin Version: 1.9.22
Java Version: 17
Target SDK: 34
Min SDK: 26

Issue:

When building the Android app, the build process fails with the following error:

Error: Gradle build failed to produce an .apk file.

Steps Tried:

Updated Kotlin version: Updated android/build.gradle and android/app/build.gradle to use Kotlin 1.9.22.
```
buildscript {
    ext.kotlin_version = "1.9.22"
}
```

Set explicit JVM targets in Gradle files:

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }
    kotlinOptions {
        jvmTarget = '17'
        apiVersion = '1.9'
        languageVersion = '1.9'
    }
}

Forced specific androidx.work dependencies:

configurations.all {
    resolutionStrategy {
        force 'androidx.work:work-runtime:2.8.1'
        force 'androidx.work:work-runtime-ktx:2.8.1'
        force 'androidx.concurrent:concurrent-futures:1.1.0'
    }
}

Tried different versions of the workmanager plugin: Tested with versions 0.5.0, 0.5.1, and 0.5.2, but the issue persists.

Relevant Code:

Initialization in `main.dart`

void main() async {
    WidgetsFlutterBinding.ensureInitialized();
    await Workmanager().initialize(
        callbackDispatcher,
        isInDebugMode: true,
    );
    // ... rest of initialization
}

@pragma('vm:entry-point')
void callbackDispatcher() async {
    Workmanager().executeTask((task, inputData) async {
        switch (task) {
            case WidgetService.WIDGET_UPDATE_TASK:
                print('Processing widget update task');
                return true;
            default:
                return false;
        }
    });
}

Question:

How can I resolve this build issue while keeping the workmanager functionality? The widget updates are crucial for my app's functionality on both platforms.

Any help or suggestions would be greatly appreciated!

Natzely · Accepted Answer · 2025-02-24 14:43:53Z

2

I can't say this will fix your issue, but because your question appeared when I was searching an answer for my own build issue with with workmanager, I'll post what I found.

There's currently an issue with the workmanager pub with the newer versions of flutter. People posted a workaround that relies on the repo directly that got my project building for now. We'll see when they update the pub. Hope this helps!

Credit to zhushenwudi on the github issue post.

workmanager:
    git:
      url: https://github.com/fluttercommunity/flutter_workmanager.git
      path: workmanager
      ref: main

answered Feb 24 at 14:43

Natzely

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Flutter Android build fails with Workmanager plugin - kotlin version conflict

Flutter Workmanager Build Issue on Android

Environment:

Issue:

Steps Tried:

Relevant Code:

Initialization in `main.dart`

Question:

1 Answer 1

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Collectives™ on Stack Overflow

Flutter Workmanager Build Issue on Android

Environment:

Issue:

Steps Tried:

Relevant Code:

Initialization in main.dart

Question:

1 Answer 1

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Initialization in `main.dart`