I just installed android studio 3.1 and updated gradle to 4.4 and now some dependencies like volley and materialmenu are linted red with error "can not resolve symbol" but project compiles and runs! Any ideas? Downloading dependency from git and putting it in a module works but i can't do it for all libraries one by one
Edit I could fixed error on volley by changing volley verson from 1.0.0 to 1.1.0 but some other libraries still have the problem.
Solved
Updating to gradle 4.6 solved the problem.
Update: if upgrading gradle to 4.6 didn't work try deleting .idea/libraries folder and invalidate catch/restart android studio