Gradle build failure when trying to use Facebook S

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'.

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

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']
        }
    }
}

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
    }
}

Am I doing something wrong?

回答1:

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.

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

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

and everything should work.

回答2:

In android studio, this is how I include a support library and facebook SDK. I'm supporting API 15+.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'fr.avianey:facebook-android-api:+@aar'
    compile 'com.android.support:support-v13:20.0.0'
    ...
}

回答3:

I had a similiar issue and it was just plain oversight on my part. I had conflicting versions of com.android.tools.build:gradle:1.1.2 and 1.1.1 inside two different gradle.build files.

app/gradle.build

dependencies {
    ...
    compile 'com.android.tools.build:gradle:1.1.2'
    ...
}

top-level gradle.build

dependencies {
        classpath 'com.android.tools.build:gradle:1.1.0'
    }

I commented out the line in my project's gradle.build file, ran gradlew clean from the command line, restarted Android Studio and then order was restored in the universe.