DiffUtil areContentsTheSame() always returns true, after the contents are updated of the List in RecycleViewAdapter - android-recyclerview

Question

This is my RecyclerView Adapter Class. Clicking an item from the list UI should change of the particular item like background black to white. After clicking an item I am changing the status of the item 0 to 1 from the UI class, based on that status UI should change of the item. But inside diffUtil areContentTheSame() retures true.
class TimeSlotsAdapter(val adapterItemOnClick: (TimeSlots) -> Unit):RecyclerView.Adapter<TimeSlotsAdapter.TimeSlotsViewHolder>() {
private lateinit var binding: RvTimeSlotsBinding
private var timeSlots: List<TimeSlots> = ArrayList<TimeSlots>()
inner class TimeSlotsViewHolder : RecyclerView.ViewHolder {
constructor(rvBinding: RvTimeSlotsBinding) : super(rvBinding.root) {
}
fun setItem(timeSlots: TimeSlots) {
binding.timeSlotView.setOnClickListener { adapterItemOnClick(timeSlots) }
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TimeSlotsViewHolder {
binding =
RvTimeSlotsBinding.inflate(LayoutInflater.from(parent.context), parent, false)
return TimeSlotsViewHolder(binding)
}
override fun onBindViewHolder(holder: TimeSlotsViewHolder, position: Int) {
timeSlots[position]?.let { currentSlot ->
with(holder) {
if (currentSlot.status == "1") {
binding.timeSlotView.background =
ContextCompat.getDrawable(
binding.timeSlotView.context,
R.drawable.time_slot_item_bg
)
binding.timeSlotTv.setTextColor(
ContextCompat
.getColor(binding.timeSlotTv.context, R.color.black)
)
binding.timeSlotTv.text = "1 " + currentSlot.time
Timber.e("${currentSlot.time} ${currentSlot.status}")
} else {
binding.timeSlotView.background =
ContextCompat.getDrawable(
binding.timeSlotView.context,
R.drawable.black_bg
)
binding.timeSlotTv.setTextColor(
ContextCompat
.getColor(binding.timeSlotTv.context, R.color.white)
)
binding.timeSlotTv.text = "0 " + currentSlot.time
Timber.e("${currentSlot.time} ${currentSlot.status}")
}
setItem(currentSlot)
}
}
}
override fun getItemCount(): Int = timeSlots.size
fun submitSlots(timeSlotList: List<TimeSlots>) {
val oldList = timeSlots
val diffResult: DiffUtil.DiffResult = DiffUtil.calculateDiff(
TimeSlotsDiffCallBack(
oldList,
timeSlotList
)
)
timeSlots = timeSlotList
diffResult.dispatchUpdatesTo(this)
}
class TimeSlotsDiffCallBack(
var oldTimeSlotsList: List<TimeSlots>,
var newTimeSlotsList: List<TimeSlots>
) : DiffUtil.Callback() {
override fun getOldListSize(): Int = oldTimeSlotsList.size
override fun getNewListSize(): Int = newTimeSlotsList.size
override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
return (oldTimeSlotsList[oldItemPosition].time
== newTimeSlotsList[newItemPosition].time)
}
override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
val oldTimeSlots = oldTimeSlotsList[oldItemPosition].status
val newTimeSlots = newTimeSlotsList[newItemPosition].status
Timber.e("old: $oldTimeSlots new: $newTimeSlots")
return oldTimeSlots == newTimeSlots
}
}
}
This is the UI class for submitting adapter list. Below the doClickTimeSlot() I am updating the status of the items.
class TimeSlotBottomSheetFragment : BottomSheetDialogFragment(){
private val obj: List<TimeSlots> = mutableListOf<TimeSlots>(
TimeSlots("09:30", "0"),
TimeSlots("10:30", "0"),
TimeSlots("11:30", "0"),
TimeSlots("12:30", "0"),
TimeSlots("14:30", "0"),
TimeSlots("15:30", "0"),
TimeSlots("16:30", "0"),
TimeSlots("17:30", "0"),
TimeSlots("18:30", "0"),
TimeSlots("19:30", "0"),
TimeSlots("20:30", "0"),
TimeSlots("21:30", "0")
)
private fun doClickTimeSlot(timeSlots: TimeSlots) {
val newList: ArrayList<TimeSlots> = ArrayList<TimeSlots>()
newList.addAll(obj)
for (i in newList.indices) {
if (newList[i].time == timeSlots.time) {
newList[i].status = "1"
Timber.e("" + newList[i].time + " " + newList[i].status)
} else {
newList[i].status = "0"
Timber.e("" + newList[i].time + " " + newList[i].status)
}
}
adapter.submitSlots(newList)
}
}