android studio 开发 Execution failed for task

Android 请求服务器一般需要使用commons-logging  httpclient  httpcore这三个jar包，导入后编译会出现问题Error:Execution failed for task 然后显示这三个jar包地址，问题主要是引用的jar包中出现了重复的文件，而gradle遇到这个问题就会停止build导致工程起不来，这时候只要找到build.gradle(Module:app)文件加入以下文字。然后重新编译即可

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'    exclude 'META-INF/LGPL2.1'}