Android Studio Doesn’t Recognize Gradle Libraries

Question

I took a project that has several external dependencies, like facebook lib, even some of the android support itself. The design compiles normally and runs perfectly on the device. The problem is that all these references when used in the code are not found by the IDE, example in the screenshot below

Answer 1

If it runs normally even being like this, go to your Android Studio:

• Click on "File"
• Then under "Invalidate caches/ Restart"
• And finally confirm in "Invalidate and Restart"