出现：Duplicate files copied in APK META-INF/DEPENDENCIES
在app目录下的build.gradle中添加如下设置
android {
......
packagingOptions {
exclude'META-INF/DEPENDENCIES'
exclude'META-INF/LICENSE'
exclude'META-INF/NOTICE'
exclude'META-INF/LICENSE.txt'
exclude'META-INF/NOTICE.txt'
}
..........
}
