Android Studio freezes on indexing

Question

my project was working well but suddenly when I ran it on my phone, Android Studio freezes and I should stop it from task manager. before this happens I installed "Geny motion" & "Virtual Box", but when the error occurred I uninstalled them. but the problem insisted.

Solutions I've tried

1. I uninstalled it and installed it again
   
2. I unplugged and plugged in my device
   
3. I disabled android indexing from setting
   

None of the above solutions worked.

Answer 1

I had today this exact problem. None of the above helped me until I found simple solution here Just run File -> Invalidate Cache and Restart That simple and it works!!!