Unity Facebook 打包Android

Android Studio 里报错 :

　　duplicate class android.support.v4.app.INotificationSideChannel found in modules Classes-Androidx.jar (Classes-Androidx.jar) and classes.jar (:com.android.support.support-compat-25.3.1:) ..

Unity Version : 2019.2.4f1

Facebook Unity SDK version : 7.16.1

原因是 Classes-Androidx.jar 与 com.android.support.support-compat-25.3.1 中都包含了Android/Support/V4/app 与Android/Support/V4/app/os 代码

删除掉Classes-Androidx.jar 中重复的代码 重新打包 

报错消失，登录可以正常使用