java-构建签名APK失败-找不到[android / content / Context]的通用超类

这是Android项目.使用normal Build成功,但是使用签名的Key我得到了这个错误：

Execution Failed for task ':transformClassesAndResourcesWithProguardForFlavorRelease'.
> java.io.IOException: java.lang.IllegalArgumentException: Can't find common super class of [android/content/Context] (with 2 kNown super classes) and [com/onesignal/ADMMessageHandler] (with 1 kNown super classes)

任何想法 ？
提前致谢…

解决方法:

我认为Proguard会导致此问题.

将此行添加到您的Proguard文件中.

-保持类com.onesignal.** {*； }

您应该阅读此问题.
它可能会帮助您.
https://github.com/OneSignal/OneSignal-Android-SDK/issues/154