android – Flutter google_sign_in错误：无法合并dex - Flutter

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

android – Flutter google_sign_in错误：无法合并dex

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