Error:Execution failed for task ':asynctask:packageDebug'

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#apache #asynctask #jar #android

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本文介绍了解决Android项目中因httpclient-cache和httpcore库导致的Duplicate files错误的方法。通过在build.gradle文件中添加排除特定文件的配置，可以有效避免打包APK时出现的重复文件问题。

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出错情形：

在项目里面导入apache官方下载的jar包：

httpclient-4.5.1.jar

httpcore-4.4.3.jar

httpclient-cache-4.5.1.jar

我的build.gradle文件：

<pre name="code" class="plain">apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "com.example.lake.asynctask"
        minSdkVersion 11
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile files('libs/httpcore-4.4.3.jar')
    compile files('libs/httpclient-cache-4.5.1.jar')
}

在代码通过编译运行正确的情况下，报出如下错误：

Information:Gradle tasks [:asynctask:assembleDebug]
:asynctask:preBuild UP-TO-DATE
:asynctask:preDebugBuild UP-TO-DATE
:asynctask:checkDebugManifest
:asynctask:preReleaseBuild UP-TO-DATE
:asynctask:prepareComAndroidSupportAppcompatV72301Library UP-TO-DATE
:asynctask:prepareComAndroidSupportSupportV42301Library UP-TO-DATE
:asynctask:prepareDebugDependencies
:asynctask:compileDebugAidl UP-TO-DATE
:asynctask:compileDebugRenderscript UP-TO-DATE
:asynctask:generateDebugBuildConfig UP-TO-DATE
:asynctask:generateDebugAssets UP-TO-DATE
:asynctask:mergeDebugAssets UP-TO-DATE
:asynctask:generateDebugResValues UP-TO-DATE
:asynctask:generateDebugResources UP-TO-DATE
:asynctask:mergeDebugResources UP-TO-DATE
:asynctask:processDebugManifest UP-TO-DATE
:asynctask:processDebugResources UP-TO-DATE
:asynctask:generateDebugSources UP-TO-DATE
:asynctask:processDebugJavaRes UP-TO-DATE
:asynctask:compileDebugJavaWithJavac UP-TO-DATE
:asynctask:compileDebugNdk UP-TO-DATE
:asynctask:compileDebugSources UP-TO-DATE
:asynctask:preDexDebug UP-TO-DATE
:asynctask:dexDebug UP-TO-DATE
:asynctask:validateDebugSigning
:asynctask:packageDebug
Error:duplicate files during packaging of APK /home/lake/android_workspace/Thread_Handler_AsyncTask/asynctask/build/outputs/apk/asynctask-debug-unaligned.apk
Path in archive: META-INF/DEPENDENCIES
Origin 1: /home/lake/android_workspace/Thread_Handler_AsyncTask/asynctask/libs/httpclient-cache-4.5.1.jar
Origin 2: /home/lake/android_workspace/Thread_Handler_AsyncTask/asynctask/libs/httpcore-4.4.3.jar
You can ignore those files in your build.gradle:
android {
packagingOptions {
exclude 'META-INF/DEPENDENCIES'
}
}
Error:Execution failed for task ':asynctask:packageDebug'.
> Duplicate files copied in APK META-INF/DEPENDENCIES
File 1: /home/lake/android_workspace/Thread_Handler_AsyncTask/asynctask/libs/httpclient-cache-4.5.1.jar
File 2: /home/lake/android_workspace/Thread_Handler_AsyncTask/asynctask/libs/httpcore-4.4.3.jar
Information:BUILD FAILED
Information:Total time: 2.135 secs
Information:2 errors
Information:0 warnings
Information:See complete output in console

解决方法：

在build.gradle中添加内容如下：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "com.example.lake.asynctask"
        minSdkVersion 11
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/dependencies.txt'
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile files('libs/httpcore-4.4.3.jar')
    compile files('libs/httpclient-cache-4.5.1.jar')
}

这个不仅可以解决"Duplicate files" 错误，还可以忽略 apache's libs 和dependency error 。