title: Not Resolving/Importing Any Class Android Studio
body: <p>Okay its weird error though, but I will explain it, actually I did remove "emulator" folder from my android SDK folder because it's causing android studio to slows down on ita knees, and when I did it, it throws a Gradle related error like "Can not read from some file", well for that i did reinstall Gradle 4.1 and error gone, but the weirdest problem occurred, now <strong>i can not import any class except appcompatactivity and constraint layout which I implemented in build.gradle</strong> , for those who wonder what I have messed up with the Android SDK folder, I want to tell you guys I just downloaded everything from scratch except having JDK 1.8.0_171. I mean I can not even import core java classes or anything, studio is pointing out for "please specify android SDK" or something, but hey I have already fresh SDK, what will be the issue, help me guys, and I swear I will never mess with SDK, am running out of time, already wasted too much time with this, Thank You !</p>