在升级到android studio 3.6.1后，对于特定项目，我也遇到了类似的问题.我尝试了几件事，但是对我有用的是删除以下行***构建文件

I also got a similar problem for a specific project after upgrading to android studio 3.6.1. I tried a couple of things but what worked for me was removing the following line top-level build file

classpath 'com.android.tools:r8:1.5.70'