An implementation of androidx.recyclerview.widget.ListAdapter<T, VH> that provides haptic feedback on scrolling.

HapticScrollListAdapter.kt

//package com.example.app.util

import android.view.HapticFeedbackConstants
import androidx.annotation.CallSuper
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView

abstract class HapticScrollListAdapter<T, VH : RecyclerView.ViewHolder>(diffCallback: DiffUtil.ItemCallback<T>) : ListAdapter<T, VH>(diffCallback) {
	protected var isScrolling: Boolean = false

	/**
	 * The haptic feedback constant to use when the RecyclerView is scrolling and the ItemView is attached to the window.
	 * Defaults to [HapticFeedbackConstants.TEXT_HANDLE_MOVE].
	 */
	open val hapticFeedbackConstant: Int = HapticFeedbackConstants.TEXT_HANDLE_MOVE

	@CallSuper
	override fun onViewAttachedToWindow(holder: VH) {
		super.onViewAttachedToWindow(holder)
		if(isScrolling) {
			holder.itemView.performHapticFeedback(hapticFeedbackConstant)
		}
	}

	@CallSuper
	override fun onAttachedToRecyclerView(recyclerView: RecyclerView) {
		super.onAttachedToRecyclerView(recyclerView)
		recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
			override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
				super.onScrollStateChanged(recyclerView, newState)
				when (newState) {
					RecyclerView.SCROLL_STATE_DRAGGING,
					RecyclerView.SCROLL_STATE_SETTLING -> {
						isScrolling = true
					}
					RecyclerView.SCROLL_STATE_IDLE -> {
						isScrolling = false
					}
				}
			}
		})
	}
}