Android Studio not showing any errors?
Sounds like you may be in power save mode. Check it on the File menu, just above Exit. While in power save, code inspection is disabled.
To get code inspection running again, you can either: 1) exit power saver mode, or 2) run inspection manually with Inspect Code... on the Analyze menu.
On the right side, click on the smiling face and pull the progress bar at the right:
I fix this problem by reset setting: File > Manage IDE Settings > Restore Default Settings.
After reinstall plugins, I realized that butter knife plugin was the problem
