Problem on debugging Lollipop Source Code with Android Studio

[Leung Tim]

I have downloaded Latest AOSP source code 5.1.1 and going to debug through Android Studio. I downloaded full source code, complied successfully and made android.ipr for Android Studio project. Unfortunately, I found many error on every codes. I see many red underline on many source code.

I followed the steps according to document at: https://shuhaowu.com/blog/setting_up_intellij_with_aosp_development.html

It is appreciated if all of you guys can help me to solve the problem.

Thank you for your assistance.