Optimized API 31 (Android 12)
Bug Fix
This app is Haptic Feedback Checker.
Please check "Implements" in menu, how to implement Haptic Feedback.
I don't understand how vibrate my device when I'm developing Android app using HapticFeedbackConstants.
And I searched Haptic Feedback Checker on Google Play, but I can't find it.
So, I made this app.
Recommend:
up to Android 8.0
