Flutter-Build schlägt fehl: Plugin [id: 'org.gradle.kotlin.kotlin-dsl', Version: '5.1.2'] nicht gefunden ⇐ Android

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Anonymous
 Flutter-Build schlägt fehl: Plugin [id: 'org.gradle.kotlin.kotlin-dsl', Version: '5.1.2'] nicht gefunden

Post by Anonymous »

Ich erhalte einen Gradle-Build-Fehler, während ich versuche, mein Flutter-Projekt unter Windows zu erstellen:

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FAILURE: Build failed with an exception.

* Where:
Build file 'C:\Users\\develop\flutter\packages\flutter_tools\gradle\build.gradle.kts' line: 7

* What went wrong:
Plugin [id: 'org.gradle.kotlin.kotlin-dsl', version: '5.1.2'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Included Builds (No included builds contain this plugin)
- Plugin Repositories (could not resolve plugin artifact 'org.gradle.kotlin.kotlin-dsl:org.gradle.kotlin.kotlin-dsl.gradle.plugin:5.1.2')
Searched in the following repositories:
Gradle Central Plugin Repository

* 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 22s
Error: Gradle task assembleDebug failed with exit code 1
Was ich versucht habe:
  • ein neues Flatterprojekt erstellen

  • Code: Select all

    flutter clean
    und gelöschte .gradle- und build-Ordner
  • Gradle und Android SDK neu installiert
  • Flutter neu installiert
  • Internetverbindung überprüft und Firewall
  • Ich habe versucht, auf Google zu suchen, aber alles deutet darauf hin, dass entweder saubere Build .gradle-Dateien oder andere Build-Dateien gelöscht werden, aber immer noch kein Erfolg
Der Fehler tritt immer noch auf, wenn Folgendes ausgeführt wird:

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flutter build apk
Umgebung:

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Flutter 3.35.6 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 9f455d2486 (2025-10-08)
Engine • hash a5f2c36e367c13f868cfe98db5806f562c52c35e
Tools • Dart 3.9.2 • DevTools 2.48.0
Gradle version: 8.12
Minimal reproduzierbares Beispiel:

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my_app/
├─ android/
│   ├─ build.gradle.kts
│   └─ gradle/wrapper/gradle-wrapper.properties
├─ lib/
│   └─ main.dart
└─ pubspec.yaml

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android/build.gradle.kts
:

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plugins {
id("org.gradle.kotlin.kotlin-dsl") version "5.1.2"
}

repositories {
google()
mavenCentral()
}

tasks.register("hello") {
doLast {
println("Hello from Gradle")
}
}

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android/gradle/wrapper/gradle-wrapper.properties
:

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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lib/main.dart
:

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import 'package:flutter/material.dart';
import 'features/auth/login_page.dart';

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

class Milog extends StatelessWidget {
const Milog({super.key});

@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const LoginPage(),
);
}
}
Anmeldeseite

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

// --- Style Variables ---
const kPrimaryGradient = LinearGradient(
colors: [Color(0xFF667eea), Color(0xFF764ba2)],
);
const kBackgroundGradient = LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [Color(0xFF667eea), Color(0xFF764ba2), Color(0xFFf093fb)],
);
const kButtonTextColor = Colors.white;
const kButtonShadowColor = Color(0xFF667eea);
const kButtonBorderRadius = 16.0;
const kForgotPasswordColor = Color(0xFF667eea);
const kErrorTextColor = Color(0xFFB00020);
const kInputIconColor = Color(0xFF667eea);
const kInputFillColor = Color(0xFFF7F8FA);
const kInputBorderColor = Color(0xFFE0E0E0);
const kInputBorderRadius = 16.0;

class LoginPage extends StatefulWidget {
const LoginPage({super.key});

@override
State createState() => _LoginPageState();
}

class _LoginPageState extends State  with TickerProviderStateMixin {
late AnimationController _fadeController;
late AnimationController _slideController;
late Animation _fadeAnimation;
late Animation _slideAnimation;

final TextEditingController _emailController = TextEditingController();
final TextEditingController _passwordController = TextEditingController();
final TextEditingController _registerNameController = TextEditingController();
final TextEditingController _registerEmailController =
TextEditingController();
final TextEditingController _registerPasswordController =
TextEditingController();
final TextEditingController _registerConfirmController =
TextEditingController();

bool _isLoading = false;
bool _isRegisterLoading = false;
bool _obscurePassword = true;
bool _obscureConfirmPassword = true;
bool _isLoginMode = true;
String _error = '';

final _authService = _DummyAuthService();

@override
void initState() {
super.initState();
_fadeController = AnimationController(
duration: const Duration(milliseconds: 800),
vsync: this,
);
_slideController = AnimationController(
duration: const Duration(milliseconds: 600),
vsync: this,
);

_fadeAnimation = CurvedAnimation(
parent: _fadeController,
curve: Curves.easeIn,
);
_slideAnimation =
Tween(begin: const Offset(0, 0.3), end: Offset.zero).animate(
CurvedAnimation(parent: _slideController, curve: Curves.easeOutCubic),
);

_fadeController.forward();
_slideController.forward();
}

@override
void dispose() {
_fadeController.dispose();
_slideController.dispose();
_emailController.dispose();
_passwordController.dispose();
_registerNameController.dispose();
_registerEmailController.dispose();
_registerPasswordController.dispose();
_registerConfirmController.dispose();
super.dispose();
}

void _toggleMode() {
setState(() {
_isLoginMode = !_isLoginMode;
_error = '';
});
}

Future _login() async {
setState(() {
_isLoading = true;
_error = '';
});

if (_emailController.text.isEmpty || _passwordController.text.isEmpty) {
setState(() {
_error = 'Please enter both email and password';
_isLoading = false;
});
return;
}

final success = await _authService.login(
_emailController.text.trim(),
_passwordController.text.trim(),
);

setState(() => _isLoading = false);

if (!success) {
setState(() => _error = 'Invalid credentials.  Please try again.');
} else {
if (mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: const Row(
children: [
Icon(Icons.check_circle, color: Colors.white),
SizedBox(width: 12),
Text('Login successful! Welcome back.'),
],
),
backgroundColor: Colors.green,
behavior: SnackBarBehavior.floating,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
),
);
}
}
}

Future _register() async {
setState(() {
_isRegisterLoading = true;
_error = '';
});

if (_registerNameController.text.isEmpty ||
_registerEmailController.text.isEmpty ||
_registerPasswordController.text.isEmpty ||
_registerConfirmController.text.isEmpty) {
setState(() {
_error = 'Please fill in all fields';
_isRegisterLoading = false;
});
return;
}

if (_registerPasswordController.text != _registerConfirmController.text) {
setState(() {
_error = 'Passwords do not match';
_isRegisterLoading = false;
});
return;
}

if (_registerPasswordController.text.length < 6) {
setState(() {
_error = 'Password must be at least 6 characters';
_isRegisterLoading = false;
});
return;
}

final success = await _authService.register(
_registerEmailController.text.trim(),
_registerPasswordController.text.trim(),
);

setState(() => _isRegisterLoading = false);

if (!success) {
setState(() => _error = 'Registration failed.  Please try again.');
} else {
if (mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: const Row(
children: [
Icon(Icons.check_circle, color: Colors.white),
SizedBox(width: 12),
Text('Registration successful! You can now log in.'),
],
),
backgroundColor: Colors.green,
behavior: SnackBarBehavior.floating,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
),
);
setState(() => _isLoginMode = true);
}
}
}

@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
decoration: const BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [Color(0xFF667eea), Color(0xFF764ba2), Color(0xFFf093fb)],
),
),
child: SafeArea(
child: Center(
child: SingleChildScrollView(
padding: const EdgeInsets.all(24.0),
child: FadeTransition(
opacity: _fadeAnimation,
child: SlideTransition(
position: _slideAnimation,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
// Logo removed
_buildAuthCard(),
],
),
),
),
),
),
),
),
);
}

Widget _buildAuthCard() {
return Container(
constraints: const BoxConstraints(maxWidth: 450),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(24),
boxShadow: [
BoxShadow(
color: Colors.black.withAlpha((0.2 * 255).toInt()),
blurRadius: 30,
offset: const Offset(0, 15),
),
],
),
child: ClipRRect(
borderRadius: BorderRadius.circular(24),
child: AnimatedSize(
duration: const Duration(milliseconds: 300),
curve: Curves.easeInOut,
child: _isLoginMode ? _buildLoginForm() : _buildRegisterForm(),
),
),
);
}

Widget _buildLoginForm() {
return Padding(
padding: const EdgeInsets.all(32.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
const Text(
'Welcome Back',
style: TextStyle(
fontSize: 28,
fontWeight: FontWeight.bold,
color: Color(0xFF2d3436),
),
textAlign: TextAlign.center,
),
const SizedBox(height: 8),
Text(
'Log in to continue',
style: TextStyle(fontSize: 14, color: Colors.grey[600]),
textAlign: TextAlign.center,
),
const SizedBox(height: 32),
_buildTextField(
controller: _emailController,
label: 'Email',
icon: Icons.email_outlined,
keyboardType: TextInputType.emailAddress,
),
const SizedBox(height: 16),
_buildTextField(
controller: _passwordController,
label: 'Password',
icon: Icons.lock_outline,
obscureText: _obscurePassword,
suffixIcon: IconButton(
icon: Icon(
_obscurePassword ? Icons.visibility_off : Icons.visibility,
color: Colors.grey,
),
onPressed: () =>
setState(() => _obscurePassword = !_obscurePassword),
),
),
const SizedBox(height: 8),
Align(
alignment: Alignment.centerLeft,
child: TextButton(
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(
builder: (context) =>  const ForgotPasswordPage(),
),
);
},
child: const Text(
'Forgot Password?',
style: TextStyle(
color: kForgotPasswordColor,
fontWeight: FontWeight.bold,
),
),
),
),
if (_error.isNotEmpty) ...[
const SizedBox(height: 16),
Container(
padding: const EdgeInsets.all(12),
decoration: BoxDecoration(
color: Colors.red.shade50,
borderRadius: BorderRadius.circular(12),
border: Border.all(color: Colors.red.shade200),
),
child: Row(
children: [
Icon(
Icons.error_outline,
color: Colors.red.shade700,
size: 20,
),
const SizedBox(width: 12),
Expanded(
child: Text(
_error,
style: TextStyle(
color: Colors.red.shade700,
fontSize: 14,
),
),
),
],
),
),
],
const SizedBox(height: 24),
_buildGradientButton(
onPressed: _isLoading ? null : _login,
isLoading: _isLoading,
text: 'Login',
),
const SizedBox(height: 24),
_buildToggleButton(),
],
),
);
}

Widget _buildToggleButton() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
_isLoginMode
? "Don't have an account? "
: "Already have an account? ",
style: TextStyle(color: Colors.grey[600]),
),
TextButton(
onPressed: _toggleMode,
child: Text(
_isLoginMode ? 'Sign Up' : 'Log In',
style: const TextStyle(
color: Color(0xFF667eea),
fontWeight: FontWeight.bold,
),
),
),
],
);
}

Widget _buildRegisterForm() {
return Padding(
padding: const EdgeInsets.all(32.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
const Text(
'Create Account',
style: TextStyle(
fontSize: 28,
fontWeight: FontWeight.bold,
color: Color(0xFF2d3436),
),
textAlign: TextAlign.center,
),
const SizedBox(height: 8),
Text(
'Sign up to start your adventure',
style: TextStyle(fontSize: 14, color: Colors.grey[600]),
textAlign: TextAlign.center,
),
const SizedBox(height: 32),
_buildTextField(
controller: _registerNameController,
label: 'Full Name',
icon: Icons.person_outline,
),
const SizedBox(height: 16),
_buildTextField(
controller: _registerEmailController,
label: 'Email',
icon: Icons.email_outlined,
keyboardType: TextInputType.emailAddress,
),
const SizedBox(height: 16),
_buildTextField(
controller: _registerPasswordController,
label: 'Password',
icon: Icons.lock_outline,
obscureText: _obscurePassword,
suffixIcon: IconButton(
icon: Icon(
_obscurePassword ? Icons.visibility_off : Icons.visibility,
color: Colors.grey,
),
onPressed: () =>
setState(() =>  _obscurePassword = !_obscurePassword),
),
),
const SizedBox(height: 16),
_buildTextField(
controller: _registerConfirmController,
label: 'Confirm Password',
icon: Icons.lock_outline,
obscureText: _obscureConfirmPassword,
suffixIcon: IconButton(
icon: Icon(
_obscureConfirmPassword
? Icons.visibility_off
: Icons.visibility,
color: Colors.grey,
),
onPressed: () => setState(
() => _obscureConfirmPassword = !_obscureConfirmPassword,
),
),
),
if (_error.isNotEmpty) ...[
const SizedBox(height: 16),
Container(
padding: const EdgeInsets.all(12),
decoration: BoxDecoration(
color: Colors.red.shade50,
borderRadius: BorderRadius.circular(12),
border: Border.all(color: Colors.red.shade200),
),
child: Row(
children: [
Icon(
Icons.error_outline,
color: Colors.red.shade700,
size: 20,
),
const SizedBox(width: 12),
Expanded(
child: Text(
_error,
style: TextStyle(
color: Colors.red.shade700,
fontSize: 14,
),
),
),
],
),
),
],
const SizedBox(height: 24),
_buildGradientButton(
onPressed: _isRegisterLoading ? null : _register,
isLoading: _isRegisterLoading,
text: 'Create Account',
),
const SizedBox(height: 24),
_buildToggleButton(),
],
),
);
}

Widget _buildTextField({
required TextEditingController controller,
required String label,
required IconData icon,
bool obscureText = false,
Widget? suffixIcon,
TextInputType? keyboardType,
}) {
return Container(
decoration: BoxDecoration(
color: Colors.grey[50],
borderRadius: BorderRadius.circular(16),
border: Border.all(color: Colors.grey[200]!),
),
child: TextField(
controller: controller,
obscureText: obscureText,
keyboardType: keyboardType,
decoration: InputDecoration(
prefixIcon: Icon(icon, color: const Color(0xFF667eea)),
suffixIcon: suffixIcon,
border: InputBorder.none,
contentPadding: const EdgeInsets.symmetric(
horizontal: 20,
vertical: 16,
),
),
),
);
}

Widget _buildGradientButton({
required VoidCallback? onPressed,
required bool isLoading,
required String text,
}) {
return Container(
height: 56,
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [Color(0xFF667eea), Color(0xFF764ba2)],
),
borderRadius: BorderRadius.circular(16),
boxShadow: [
BoxShadow(
color: Color(0xFF667eea).withAlpha((0.4 * 255).toInt()),
blurRadius: 15,
offset: Offset(0, 8),
),
],
),
child: ElevatedButton(
onPressed: onPressed,
style: ElevatedButton.styleFrom(
backgroundColor: Colors.transparent,
shadowColor: Colors.transparent,
shape: RoundedRectangleBorder(),
),
child: isLoading
? SizedBox(
height: 24,
width: 24,
child: CircularProgressIndicator(
color: Colors.white,
strokeWidth: 2.5,
),
)
: Text(
text,
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
color: Colors.white,
),
),
),
);
}
}

class _DummyAuthService {
Future  login(String email, String password) async {
await Future.delayed(const Duration(seconds: 1));
return email == '[email protected]' && password == 'password123';
}

Future register(String email, String password) async {
await Future.delayed(const Duration(seconds: 1));
return email.isNotEmpty && password.length >= 6;
}
}
Befehl zum Reproduzieren:

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flutter build apk
Erwartetes Verhalten: erfolgreich erstellt oder ein klarerer Plugin-Auflösungsfehler ausgegeben.

Tatsächliches Verhalten:

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Plugin [id: 'org.gradle.kotlin.kotlin-dsl', version: '5.1.2'] was not found in any of the following sources
Passiert sowohl in VS Code als auch in Android Studio (Narwhal).
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