添加firebase_core依赖后Flutter应用无法运行，请求协助

未添加firebase_core时应用运行正常，使用flutter pub add命令添加firebase_core或firebase_auth后，构建出现错误：Gradle任务:firebase_core:extractDebugAnnotations执行失败，无法加载groovy-json的模块元数据。

相关配置文件 #

android/app/build.gradle #

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

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

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

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

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.myapp"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
        // minSdkVersion flutter.minSdkVersion
        minSdkVersion 21
        targetSdkVersion flutter.targetSdkVersion
        // targetSdkVersion 31
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

main.dart #

import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:myapp/firebase_options.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @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;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @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.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

构建错误日志 #

Launching lib\main.dart on Redmi Note 7 Pro in debug mode...

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':firebase_core:extractDebugAnnotations'.
> Could not resolve all dependencies for configuration ':firebase_core:detachedConfiguration2'.
   > Could not load module metadata from C:\Users\Sagar\.gradle\caches\modules-2\metadata-2.97\descriptors\org.codehaus.groovy\groovy-json\3.0.8\a8be1fe3b3911d3d3425fe720cf42835\descriptor.bin

* 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 9m 31s
Running Gradle task 'assembleDebug'...                            583.5s
Exception: Gradle task assembleDebug failed with exit code 1

这类问题大多由Gradle缓存损坏或依赖兼容性问题导致，按以下步骤处理：

1. 清理缓存

   • 删除本地Gradle缓存目录：C:\Users\你的用户名\.gradle\caches
   • 回到项目根目录，执行命令清理Flutter缓存并重新获取依赖：

     flutter clean
     flutter pub get
     

2. 更新Gradle版本

   • 打开项目根目录下的android/build.gradle，升级Gradle插件和Kotlin版本到稳定版，示例：

     buildscript {
         ext.kotlin_version = '1.8.0'
         repositories {
             google()
             mavenCentral()
         }
     
         dependencies {
             classpath 'com.android.tools.build:gradle:7.4.2'
             classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
             classpath 'com.google.gms:google-services:4.3.15'
         }
     }
     

   • 修改android/gradle/wrapper/gradle-wrapper.properties中的Gradle分发地址：

     distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
     

3. 固定Firebase依赖版本

   • 在pubspec.yaml中指定与当前Flutter SDK兼容的Firebase依赖版本，示例：

     dependencies:
       flutter:
         sdk: flutter
       firebase_core: ^2.15.0
       firebase_auth: ^4.10.0
     

4. 重新构建

   • 执行flutter run重新构建项目；若仍报错，在Android Studio中选择File -> Invalidate Caches... -> 勾选Invalidate and Restart重启IDE。

内容的提问来源于stack exchange，提问作者Sameer P