android - 尝试使用 Facebook SDK 时 Gradle 构建失败

Question

我正在尝试在 Android Studio 的项目中使用 Facebook SDK。我正在执行 this 的第 3 步教程。当我尝试运行该应用程序时，我收到“Gradle:任务 ':FacebookApp:dexDebug' 执行失败。”错误。下面是错误的输出

Gradle: Execution failed for task ':FacebookApp:dexDebug'.
> Failed to run command:
C:\android-sdk\build-tools\18.0.0\dx.bat --dex --output C:\Users\Brandon\AndroidStudioProjects\FacebookAppProject\FacebookApp\build\libs\FacebookApp-debug.dex C:\Users\Brandon\AndroidStudioProjects\FacebookAppProject\FacebookApp\build\classes\debug C:\Users\Brandon\AndroidStudioProjects\FacebookAppProject\FacebookApp\build\dependency-cache\debug C:\Users\Brandon\AndroidStudioProjects\FacebookAppProject\FacebookApp\build\exploded-bundles\FacebookAppProjectLibrariesFacebookUnspecified.aar\classes.jar C:\Users\Brandon\AndroidStudioProjects\FacebookAppProject\FacebookApp\build\exploded-bundles\FacebookAppProjectLibrariesFacebookUnspecified.aar\libs\android-support-v4.jar C:\android-sdk\extras\android\m2repository\com\android\support\support-v4\13.0.0\support-v4-13.0.0.jar
    Error Code:
        1
    Output:
        UNEXPECTED TOP-LEVEL EXCEPTION:
        java.lang.IllegalArgumentException: already added: Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat$AccessibilityServiceInfoIcsImpl;
            at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)
            at com.android.dx.dex.file.DexFile.add(DexFile.java:163)
            at com.android.dx.command.dexer.Main.processClass(Main.java:490)
            at com.android.dx.command.dexer.Main.processFileBytes(Main.java:459)
            at com.android.dx.command.dexer.Main.access$400(Main.java:67)
            at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:398)
            at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245)
            at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:131)
            at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:109)
            at com.android.dx.command.dexer.Main.processOne(Main.java:422)
            at com.android.dx.command.dexer.Main.processAllFiles(Main.java:333)
            at com.android.dx.command.dexer.Main.run(Main.java:209)
            at com.android.dx.command.dexer.Main.main(Main.java:174)
            at com.android.dx.command.Main.main(Main.java:91)
        1 error; aborting

这是 facebook 模块的 build.gradle:

buildscript {
    repositories {
        maven { url 'http://repo1.maven.org/maven2' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.5.+'
    }
}

apply plugin: 'android-library'

dependencies {
    compile files('libs/android-support-v4.jar')
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.0.0"

    defaultConfig {
        minSdkVersion 7
        targetSdkVersion 16
    }

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            res.srcDirs = ['res']
        }
    }
}

以及项目的 build.gradle:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.5.+'
    }
}
apply plugin: 'android'

repositories {
    mavenCentral()
}

dependencies {
    compile 'com.android.support:support-v4:13.0.+'
    compile project(':libraries:facebook')
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.0.0"

    defaultConfig {
        minSdkVersion 7
        targetSdkVersion 16
    }
}

我做错了什么吗？

Answer 1

您添加了两次 android 支持库，导致 dex 合并冲突。您的主项目使用 'com.android.support:support-v4:13.0.+' 引用 Maven 库，您的 Facebook 项目使用 files('libs/android-support -v4.jar')。 Gradle无法解决本地jar文件之间的冲突，必须通过maven引用。

将 Facebook build.gradle 的 dependencies 部分修改为:

dependencies {
    compile 'com.android.support:support-v4:13.0.+'
}

一切都应该正常。