android – Flutter google_sign_in错误：无法合并dex

亲爱的Flutter社区,

我正在敲打一个看似简单的任务.
我想在我的应用中添加firebase身份验证.它适用于iOS,但当我尝试为Android实现它时,我系统地得到错误：

Launching lib/main.dart on Android SDK built for x86 in debug mode…
Initializing gradle… Resolving dependencies… Running ‘gradlew
assembleDebug’… Configuration ‘compile’ in project ‘:app’ is
deprecated. Use ‘implementation’ instead. registerResGeneratingTask is
deprecated, use registerGeneratedFolders(FileCollection)
registerResGeneratingTask is deprecated, use
registerGeneratedFolders(FileCollection) registerResGeneratingTask is
deprecated, use registerGeneratedFolders(FileCollection) Configuration
‘compile’ in project ‘:google_sign_in’ is deprecated. Use
‘implementation’ instead.

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ‘:app:transformDexArchiveWithExternalLibsDexMergerForDebug’.

  java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge
  dex

    >尝试：使用–stacktrace选项运行以获取堆栈跟踪.使用–info或–debug选项运行以获取更多日志输出.
    >在https://help.gradle.org获得更多帮助
    
    
    在34s内失败完成错误：Gradle构建失败：1

  我使用’flutter create’重现了错误,然后在codelab之后添加了Firebase功能
  https://codelabs.developers.google.com/codelabs/flutter-firebase/#4

  这是pubspec.yaml的唯一修改

  dependencies:
    flutter:
      sdk: flutter
    google_sign_in: 0.3.1 # ONLY MODIFICATION
    # The following adds the Cupertino Icons font to your application.
    # Use with the CupertinoIcons class for iOS style icons.
    cupertino_icons: ^0.1.0
  

  一般build.gradle：

  buildscript {
      repositories {
          google()
          jcenter()
      }
  
      dependencies {
          classpath 'com.android.tools.build:gradle:3.0.1'
          classpath 'com.google.gms:google-services:3.1.0' #ONLY MODIF
      }
  
  }
  
  allprojects {
      repositories {
          google()
          jcenter()
      }
  }
  
  rootProject.buildDir = '../build'
  subprojects {
      project.buildDir = "${rootProject.buildDir}/${project.name}"
  }
  subprojects {
      project.evaluationDependsOn(':app')
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  

  App build.gradle：

  def localProperties = new Properties()
  def localPropertiesFile = rootProject.file('local.properties')
  if (localPropertiesFile.exists()) {
      localPropertiesFile.withInputStream { stream ->
          localProperties.load(stream)
      }
  }
  
  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.")
  }
  
  apply plugin: 'com.android.application'
  apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
  
  android {
      compileSdkVersion 26
      buildToolsVersion '26.0.3'
  
      lintOptions {
          disable 'InvalidPackage'
      }
  
      defaultConfig {
          // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
          applicationId "com.mycompany.test"
          minSdkVersion 16
          targetSdkVersion 26
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
  
      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 {
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.1'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
  
  }
  
  apply plugin: 'com.google.gms.google-services'
  

  这是颤动的医生输出：

  [✓] Flutter (on Mac OS X 10.13.2 17C88, locale fr-BE, channel master)
  • Flutter at /Users/sergebesnard/flutter
  • Framework revision 4d2c2aaaa1 (6 days ago), 2017-12-27 07:30:31 -0800
  • Engine revision 7c126001d8
  • Tools Dart version 1.25.0-dev.11.0
  • Engine Dart version 2.0.0-edge.9e8a3e2d31621c1bdf6139d068e7898a2ac2ab5a

  [✓] Android toolchain – develop for Android devices (Android SDK
  27.0.2)
  • Android SDK at /Users/sergebesnard/Library/Android/sdk
  • Android NDK location not configured (optional; useful for native profiling support)
  • Platform android-27, build-tools 27.0.2
  • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
  • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08)

  [✓] iOS toolchain – develop for iOS devices (Xcode 9.2)
  • Xcode at /Applications/Xcode.app/Contents/Developer
  • Xcode 9.2, Build version 9C40b
  • ios-deploy 1.9.2
  • CocoaPods version 1.3.1

  [✓] Android Studio (version 3.0)
  • Android Studio at /Applications/Android Studio.app/Contents
  • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08)

  [✓] IntelliJ IDEA Community Edition (version 2017.2.5)
  • Flutter plugin version 18.0
  • Dart plugin version 172.4155.35

  [✓] Connected devices
  • Android SDK built for x86 • emulator-5554 • android-x86 • Android 8.0.0 (API 26) (emulator)

  我显然是Android开发的新手,并且不希望成为专家来使教程工作.我发现的每个解决方案都需要修改.gradle文件,并且仅适用于react-native.

  谢谢您的帮助 ！

解决方法:

此错误表示您的某些依赖项使用不同版本的Google Play服务.

您必须降级/升级插件才能统一使用的版本