直接右键运行Run 'main()'是会报错的,

* What went wrong:
A problem occurred configuring project ':app'.
> Could not create task ':app:RsaUtils.main()'.
   > SourceSet with name 'main' not found.

需要Run  'main' with Coverage

有些文章说需要在gradle.xml里面加上<option name="delegatedBuild" value="false" />,实验了，貌似不加也行的。