java - 尝试导入 2 个 jar 文件时，Android Studio 出现 DuplicateFileException

Question

我正在尝试将两个 jar 文件导入到我的 Android Studio 项目中。但是当我尝试运行代码时。我收到以下错误。

Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.
 > com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate
files copied in APK META-INF/ECLIPSE_.RSA

File1: A:\Uni-mora-sem4\IOT\Project\ClientApp\AndroidClientV2\app\libs
\org.eclipse.paho.android.service-1.0.2.jar

File2: A:\Uni-mora-sem4\IOT\Project\ClientApp\AndroidClientV2\app\libs\org.eclipse.paho.client.mqttv3-1.0.2.jar

Gradle文件如下.........

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "iot.dulanga.com.androidclientv2"
        minSdkVersion 13
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}
repositories {
    maven {
        url "https://repo.eclipse.org/content/repositories/paho-releases/"
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.2.1'
    compile 'com.android.support:design:23.2.1'
    compile files('libs/org.eclipse.paho.android.service-1.0.2.jar')
    compile files('libs/org.eclipse.paho.client.mqttv3-1.0.2.jar')

}

我为什么会收到这个错误有什么想法吗？？

Answer 1

这是因为两个 jar 都包含 META-INF/ECLIPSE_.RSA，因此在打包 apk 时，会出现重复.

所以尝试在应用程序的 build.gradle 中添加:

android {
   packagingOptions {
      exclude 'META-INF/ECLIPSE_.RSA'
   }
}