title: Getting Classes in red color with out syntactical errors in Android studio
body: <p>I was trying to rename project packages by ctrl+shift+r command to new name. Observed the classes red color as indicate in the screenshot and after that when I tried to install App in real device it is not getting installed.</p>
  
  <p>Does anybody had issue like this? </p>
  
  <p><a href="https://i.stack.imgur.com/CvX3R.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CvX3R.png" alt="enter image description here"></a></p>