the apk for your currently selected variant(app-release-unsigned.apk)is not signed.

原文地址：https://blog.csdn.net/charles_dai001/article/details/79623158 今天用 android studio3.0 来编译 release 配置的项目时报了以下错误： the apk for your currently selected variant(app-release-unsigned.apk)is not signed. 

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