Tried to build it, but there seems to be a missing file.

[rjs0429]

I tried to build that code, but I checked that there were missing files as shown in the picture. Is it correct that these files are missing? Or is there anything else I missed?

Thank you!

我试图构建那个代码，但是确认了照片上显示的文件丢失了. 这些文件不见了，对吗？ 或者还有什么我遗漏的吗？

谢谢！