DuplicateFileException: Duplicate files copied in APK

问题： DuplicateFileException: Duplicate files copied in APK META-INF/LICENSE
原因：重复的META-INF/LICENSE导入

解决方法： 一般情况下只需要exclude ‘META-INF/LICENSE’ 就可以了。
其他的：

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'
}