[Shared Preferences] Kotlin version error in latest shared_preferences_android version (2.4.1)

[istornz]

Steps to reproduce

• Create a new project including Android platform.
• Install shared preferences plugin
• Be sure the latest version of the plugin "shared_preferences_android' is set to "2.4.1" (check on the pubspec.lock file)
• Launch an integration test.

Expected results

Launch will be successful

Actual results

Error in console and app won't launch at all:

Running Gradle task 'assembleDebug'...                          
C:\Users\dimit\AppData\Local\Pub\Cache\hosted\pub.dev\shared_preferences_android-2.4.1\android\src\main\java\io\flutter\plugins\sharedpreferences\LegacySharedPreferencesPlugin.java:200: error: cannot find symbol
            new StringListObjectInputStream(new ByteArrayInputStream(Base64.decode(listString, 0)));
                ^
  symbol:   class StringListObjectInputStream
  location: class ListEncoder
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':shared_preferences_android:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
> Run with --info option to get more log output.
> Run with --scan to get full insights.

BUILD FAILED in 2m 24s

Code sample

Just launch a very simple integration test.

Screenshots or Video

Screenshots / Video demonstration

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Logs

Logs

[Paste your logs here]

Flutter Doctor output

Doctor output

[✓] Flutter (Channel stable, 3.27.2, on Microsoft Windows [version 10.0.26100.2605], locale fr-FR)
    • Flutter version 3.27.2 on channel stable at C:\Users\dimit\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 68415ad1d9 (4 days ago), 2025-01-13 10:22:03 -0800
    • Engine revision e672b006cb
    • Dart version 3.6.1
    • DevTools version 2.40.2

[✓] Windows Version (Installed version of Windows is version 10 or higher)

[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
    • Android SDK at C:\Users\dimit\AppData\Local\Android\sdk
    • Platform android-35, build-tools 35.0.0
    • Java binary at: C:\Program Files\Java\jdk-19\bin\java
    • Java version Java(TM) SE Runtime Environment (build 19.0.2+7-44)
    • All Android licenses accepted.

[✗] Chrome - develop for the web (Cannot find Chrome executable at .\Google\Chrome\Application\chrome.exe)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.

[✗] Visual Studio - develop Windows apps
    ✗ Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components

[✓] Android Studio (version 2024.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.3+-12282718-b509.11)

[✓] VS Code (version 1.96.4)
    • VS Code at C:\Users\dimit\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.102.0

[✓] Connected device (3 available)
    • SM G950F (mobile) • ce051715db73da0601 • android-arm64  • Android 9 (API 28)
    • Windows (desktop) • windows            • windows-x64    • Microsoft Windows [version 10.0.26100.2605]
    • Edge (web)        • edge               • web-javascript • Microsoft Edge 131.0.2903.112

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 2 categories.

Temp workaround

Downgrade the android plugin to 2.4.0.

Add in your pubspec.yaml file:

dependency_overrides:
  shared_preferences_android: '2.4.0'

[YoussefLasheen]

Upgrading kotlin fixes the issue

[maheshj01]

Hello @istornz, Can you try using the latest version shared_preferences_android: ^2.4.2

Screen.Recording.2025-01-17.at.19.42.34.mov

code sample

import 'package:flutter/material.dart';
import 'package:shared_preferences_android/shared_preferences_android.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  Future<void> _incrementCounter() async {
    setState(() {
      _counter++;
    });
    final status = await sharedPreferencesAndroid.setValue(
        'Int', 'flutter.counter', _counter);
    print("Status: $status");
  }

  late SharedPreferencesAndroid sharedPreferencesAndroid;

  Future<void> init() async {
    sharedPreferencesAndroid = SharedPreferencesAndroid();
    final pairs = await sharedPreferencesAndroid.getAll();
    for (final pair in pairs.entries) {
      if (pair.key == 'flutter.counter') {
        setState(() {
          _counter = pair.value as int;
        });
        print("Counter: $_counter");
        break;
      }
    }
  }

  @override
  void initState() {
    WidgetsBinding.instance!.addPostFrameCallback((_) {
      if (mounted) {
        init();
      }
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.displayMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        key: const ValueKey('increment'),
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }
}

Integration test

// root/integration_test/app_test.dart
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:platform_stack_test/main.dart';
import 'package:shared_preferences_android/shared_preferences_android.dart';

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  SharedPreferencesAndroid().clear();
  group('end-to-end test', () {
    testWidgets('tap on the floating action button, verify counter',
        (tester) async {
      // Load app widget.
      await tester.pumpWidget(const MyApp());

      // Verify the counter starts at 0.
      expect(find.text('0'), findsOneWidget);

      // Finds the floating action button to tap on.
      final fab = find.byKey(const ValueKey('increment'));

      // Emulate a tap on the floating action button.
      await tester.tap(fab);

      // Trigger a frame.
      await tester.pumpAndSettle();

      // Verify the counter increments by 1.
      expect(find.text('1'), findsOneWidget);
    });
  });

  group('shared_preferences test', () {
    testWidgets('verify shared_preferences sets initial value', (tester) async {
      // Load app widget.
      await tester.pumpWidget(const MyApp());

      expect(find.text('0'), findsOneWidget);
    });

    testWidgets('verify shared_preferences increments value', (tester) async {
      // Load app widget.
      await tester.pumpWidget(const MyApp());

      // Verify the counter starts at 0.
      expect(find.text('0'), findsOneWidget);

      // Finds the floating action button to tap on.
      final fab = find.byKey(const ValueKey('increment'));

      // Emulate a tap on the floating action button.
      await tester.tap(fab);

      // Trigger a frame.
      await tester.pumpAndSettle();

      // Verify the counter increments by 1.
      expect(find.text('1'), findsOneWidget);

      // Verify the shared_preferences value is 1.
      final sharedPreferences = SharedPreferencesAndroid();
      final pairs = await sharedPreferences.getAll();
      for (final pair in pairs.entries) {
        if (pair.key == 'flutter.counter') {
          expect(pair.value, 1);
          break;
        }
      }
    });
  });
}

flutter doctor -v

[✓] Flutter (Channel stable, 3.27.2, on macOS 15.1.1 24B2091 darwin-arm64, locale
    en-US)
    • Flutter version 3.27.2 on channel stable at /Users/mahesh/Development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 68415ad1d9 (4 days ago), 2025-01-13 10:22:03 -0800
    • Engine revision e672b006cb
    • Dart version 3.6.1
    • DevTools version 2.40.2
    • If those were intentional, you can disregard the above warnings; however it is
      recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/mahesh/Library/Android/sdk
    • Platform android-35, build-tools 34.0.0
    • ANDROID_HOME = /Users/mahesh/Library/Android/sdk
    • Java binary at: /Applications/Android
      Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build
      17.0.11+0-17.0.11b1207.24-11852314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.0)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16A242d
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build
      17.0.11+0-17.0.11b1207.24-11852314)

[✓] IntelliJ IDEA Community Edition (version 2021.2.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 61.2.4
    • Dart plugin version 212.5080.8

[✓] VS Code (version 1.96.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.102.0

[✓] Connected device (4 available)
    • sdk gphone16k arm64 (mobile)    • emulator-5554         • android-arm64  •
      Android 15 (API 35) (emulator)
    • macOS (desktop)                 • macos                 • darwin-arm64   •
      macOS 15.1.1 24B2091 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin         •
      macOS 15.1.1 24B2091 darwin-arm64
    • Chrome (web)                    • chrome                • web-javascript •
      Google Chrome 131.0.6778.265

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

[ibrahimkelly]

I got this error in the latest 2.4.2
`
src\main\java\io\flutter\plugins\GeneratedPluginRegistrant.java:99: error: cannot find symbol
flutterEngine.getPlugins().add(new io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin());
^
symbol: class SharedPreferencesPlugin
location: package io.flutter.plugins.sharedpreferences
1 error

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:compileReleaseJavaWithJavac'.

Compilation failed; see the compiler error output for details.

• Try:

Run with --info option to get more log output.
Run with --scan to get full insights.

BUILD FAILED in 1m 35s
Running Gradle task 'assembleRelease'... 96.5s
Gradle task assembleRelease failed with exit code 1
`

[centy]

@maheshj01
In my case this helps also:

However I am getting a lot errors like this:

Suppressed: java.lang.Exception: Could not close incremental caches in D:\SourceCode\Flutter\apf\build\webview_flutter_android\kotlin\compileDebugKotlin\cacheable\caches-jvm\inputs: source-to-output.tab
... 25 more
Suppressed: java.lang.IllegalArgumentException: this and base files have different roots: C:\Users\jacek\AppData\Local\Pub\Cache\hosted\pub.dev\webview_flutter_android-4.2.0\android\src\main\java\io\flutter\plugins\webviewflutter\AndroidWebkitLibrary.g.kt and D:\SourceCode\Flutter\app\android.
at kotlin.io.FilesKt__UtilsKt.toRelativeString(Utils.kt:117)
at kotlin.io.FilesKt__UtilsKt.relativeTo(Utils.kt:128)

[ibrahimkelly]

@maheshj01
In my case this helps also:

However I am getting a lot errors like this:

Suppressed: java.lang.Exception: Could not close incremental caches in D:\SourceCode\Flutter\apf\build\webview_flutter_android\kotlin\compileDebugKotlin\cacheable\caches-jvm\inputs: source-to-output.tab
... 25 more
Suppressed: java.lang.IllegalArgumentException: this and base files have different roots: C:\Users\jacek\AppData\Local\Pub\Cache\hosted\pub.dev\webview_flutter_android-4.2.0\android\src\main\java\io\flutter\plugins\webviewflutter\AndroidWebkitLibrary.g.kt and D:\SourceCode\Flutter\app\android.
at kotlin.io.FilesKt__UtilsKt.toRelativeString(Utils.kt:117)
at kotlin.io.FilesKt__UtilsKt.relativeTo(Utils.kt:128)

Thanks Bro, the mine is built.

[VivienStreit]

@maheshj01 In my case this helps also:

However I am getting a lot errors like this:

Suppressed: java.lang.Exception: Could not close incremental caches in D:\SourceCode\Flutter\apf\build\webview_flutter_android\kotlin\compileDebugKotlin\cacheable\caches-jvm\inputs: source-to-output.tab ... 25 more Suppressed: java.lang.IllegalArgumentException: this and base files have different roots: C:\Users\jacek\AppData\Local\Pub\Cache\hosted\pub.dev\webview_flutter_android-4.2.0\android\src\main\java\io\flutter\plugins\webviewflutter\AndroidWebkitLibrary.g.kt and D:\SourceCode\Flutter\app\android. at kotlin.io.FilesKt__UtilsKt.toRelativeString(Utils.kt:117) at kotlin.io.FilesKt__UtilsKt.relativeTo(Utils.kt:128)

Thank you!

If this can help anyone, in my case, version 1.9.0 for "org.jetbrains.kotlin.android" seems enough.

[github-actions]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now.
If you find this problem please file a new issue with the same description, what happens, logs and the output of 'flutter doctor -v'. All system setups can be slightly different so it's always better to open new issues and reference the related ones.
Thanks for your contribution.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.