If by “shadow” you mean brown coloring, that means that directory is marked as “excluded” in project structure. The code will run, but code inspection and insight won’t work for excluded folders, so please remove “excluded” flag from Project Structure settings.
点击设置：项目；项目结构；点击Add Content Root；将根目录选中即可
版权声明：本文为weixin_45798949原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。