libs导入包会有冲突，解决方法（Error:Execution failed for task ':app:transformResourcesWithMe）...

libs 下面添加相似的包会报错。

例如添加

httpclient-4.5.2

httpcore-4.4.4-208.jar

会报错：

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/LICENSE
File1: E:\Workspace_Studio\FirstDemo\app\libs\httpclient-4.5.2.jar
File2: E:\Workspace_Studio\FirstDemo\app\libs\httpcore-4.4.4-208.jar

解决方法：

Gradle Scripts下面

build.gradle(Module:app)文件里面添加：

packagingOptions {
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/NOTICE'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/ASL2.0'
exclude 'META-INF/notice.txt’

修改后的文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.hh.firstdemo"
        minSdkVersion 16
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/ASL2.0'
        exclude 'META-INF/notice.txt'
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.1.0'
    testCompile 'junit:junit:4.12'
    compile 'com.google.android.gms:play-services-appindexing:8.4.0'
    compile files('libs/httpclient-4.5.2.jar')
    compile files('libs/httpcore-4.4.4-208.jar')
}