AS新建项目，代码报错，但可以正常运行

Question

error pic

when I create a new project in Android Studio Arctic Fox | 2020.3.1 Patch 4,I create MainActivity by kotlin,code reports some error (introduced red), but it can run normally.

---

I' ve looked around and apparently I've got the choice between these solutions:

1. I try to Click File -> Invalidate Caches/Restar.Open the project again,not work.
2. I tyr to Build -> Clean project,Rebuild project.Not work,code reports some error
3. I try to Close my project, and in my project folder delete project/.idea and project/.gradle.Open the project again,not work.

It can run normally,but Look uncomfortable,I am searching for a long time on net. But no use. Please help or try to give some ideas how to achieve this.Thanks in advance.

Answer 1

Try using the latest and appropriate version for your Gradle and using the correct version of the initial in the Gradle. You can also invalidate your caches to ensure using the latest new data. In some cases, upgrading your SDK is a way to fix the problem.

If not works, please share your error here to follow up.