Developer's DescriptionBy Jane ProjectThis app is Haptic Feedback Checker.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