Error:duplicate files during packaging of APK app\build\outputs\apk\app-debug-unali
这个错误的解决方法是：在app的build.gradle文件中增加以下内容：
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‘
}
Error:duplicate files during packaging of APK app\
原文：http://my.oschina.net/896698/blog/501054