My Project hat einwandfrei funktioniert. Als ich Facebook SDK in mein Projekt aufgenommen habe, ist ein Fehler wie dieser aufgetreten. Ich habe so viele Möglichkeiten ausprobiert, diesen Fehler zu beheben, aber das habe ich nicht getan. Was soll ich machen

  Error:Execution failed for task ':app:packageAllDebugClassesForMultiDex'.
> java.util.zip.ZipException: duplicate entry: bolts/AggregateException.class

Mein App-Gradle ist unter

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion '21.1.2'

    defaultConfig {
        applicationId "com.example.myproject"
        minSdkVersion 9
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
        multiDexEnabled = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'

    compile project(':facebook')
}

Und hier ist das Facebook build.gradle

apply plugin: 'com.android.library'

repositories {
  mavenCentral()
}

project.group = 'com.facebook.android'

dependencies {
    compile 'com.android.support:support-v4:[21,22)'
    compile 'com.parse.bolts:bolts-android:1.1.4'
}

android {
    compileSdkVersion 21
    buildToolsVersion '21.1.2'

    defaultConfig {
        minSdkVersion 9
        targetSdkVersion 21
    }

    lintOptions {
        abortOnError false
    }

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            res.srcDirs = ['res']
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
}

apply plugin: 'maven'
apply plugin: 'signing'

def isSnapshot = version.endsWith('-SNAPSHOT')
def ossrhUsername = hasProperty('NEXUS_USERNAME') ? NEXUS_USERNAME : ""
def ossrhPassword = hasProperty('NEXUS_PASSWORD') ? NEXUS_PASSWORD : ""

task setVersion {
    // The version will be derived from source
    project.version = null
    def sdkVersionFile = file('src/com/facebook/FacebookSdkVersion.java')
    sdkVersionFile.eachLine{
        def matcher = (it =~ /(?:.*BUILD = \")(.*)(?:\".*)/)
        if (matcher.matches()) {
          project.version = matcher[0][1]
          return
        }
    }
    if (project.version.is('unspecified')) {
      throw new GradleScriptException('Version could not be found.', null)
    }
}

uploadArchives {
    repositories.mavenDeployer {
        beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }

        repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
            authentication(userName: ossrhUsername, password: ossrhPassword)
        }

        snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
            authentication(userName: ossrhUsername, password: ossrhPassword)
        }

        pom.project {
            name 'Facebook-Android-SDK'
            artifactId = 'facebook-android-sdk'
            packaging 'aar'
            description 'Facebook Android SDK'
            url 'https://github.com/facebook/facebook-android-sdk'

            scm {
                connection 'scm:[email protected]:facebook/facebook-android-sdk.git'
                developerConnection 'scm:[email protected]:facebook/facebook-android-sdk.git'
                url 'https://github.com/facebook/facebook-android-sdk'
            }

            licenses {
                license {
                    name 'The Apache Software License, Version 2.0'
                    url 'https://github.com/facebook/facebook-android-sdk/blob/master/LICENSE.txt'
                    distribution 'repo'
                }
            }

            developers {
                developer {
                    id 'facebook'
                    name 'Facebook'
                }
            }
        }
    }
}

uploadArchives.dependsOn(setVersion)

signing {
    required { !isSnapshot && gradle.taskGraph.hasTask("uploadArchives") }
    sign configurations.archives
}

task androidJavadocs(type: Javadoc) {
    source = android.sourceSets.main.java.srcDirs
    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
}

task androidJavadocsJar(type: Jar, dependsOn: androidJavadocs) {
    classifier = 'javadoc'
    from androidJavadocs.destinationDir
}

task androidSourcesJar(type: Jar) {
    classifier = 'sources'
    from android.sourceSets.main.java.sourceFiles
}

artifacts {
    archives androidSourcesJar
    archives androidJavadocsJar
}

afterEvaluate {
    androidJavadocs.classpath += project.android.libraryVariants.toList().first().javaCompile.classpath
}