当试图使用Facebook SDK时，Gradle构建失败

问题描述

我正试图在Android Studio的项目中使用Facebook SDK。我正在遵循教程。当我尝试运行应用程序时，我得到一个Gradle：执行失败的任务：FacebookApp：dexDebug。错误。以下是输出，如果错误

I am trying to use the Facebook SDK in a project in Android Studio. I am following step 3 of this tutorial. When I try to Run the app, I get a "Gradle: Execution failed for task ':FacebookApp:dexDebug'." error. Below is the output if the error

Gradle: Execution failed for task ':FacebookApp:dexDebug'.

这是Facebook模块的build.gradle：

Here is the build.gradle for the facebook module:

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']
        }
    }
}

而build.gra该项目为：

And the build.gradle for the project:

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？

推荐答案

您正在添加两次Android支持库，导致dex合并冲突。您的主要项目是指具有'com.android.support:support-v4:13.0。+'的maven库，您的Facebook项目是以文件（ '库/机器人支撑-v4.jar'）。 Gradle无法解决本地jar文件之间的冲突，因此您必须通过maven引用它们。

You're adding the android support library twice, resulting in a dex merge conflict. Your main project refers to the maven library with 'com.android.support:support-v4:13.0.+' and your Facebook project refers to it with files('libs/android-support-v4.jar'). Gradle cannot resolve conflicts between local jar files, so you must refer to them through maven.

修改依赖项部分的Facebook build.gradle到：

Modify the dependencies section of your Facebook build.gradle to:

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

，一切都应该可以工作。

and everything should work.

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