swipeToDelete works but can't get icon to show up - kotlin

Question

I wanted my listitems to be swipeabel in order to delete them and I found this code through a video and it works for me if i comment out some stuff and dont't pass a context to the abstract class. now the thing is that I can't get the delete icon to work and the problem seems to be that by the time i call this abstract class i don't yet have usable context i can pass on.
abstract class SwipeToDeleteCallback(context: Context) : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
private val deleteIcon = ContextCompat.getDrawable(context, R.drawable.ic_delete)
private val intrinsicWidth = deleteIcon!!.intrinsicHeight
private val intrinsicHeight = deleteIcon!!.intrinsicHeight
private val background = ColorDrawable()
private val backgroundColor = Color.parseColor("#f44336")
private val clearPaint = Paint().apply { xfermode = PorterDuffXfermode(PorterDuff.Mode.CLEAR) }
override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
return false
}
override fun onChildDraw(
c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder,
dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean
) {
val itemView = viewHolder.itemView
val itemHeight = itemView.bottom - itemView.top
val isCanceled = dX == 0f && !isCurrentlyActive
if (isCanceled) {
clearCanvas(c, itemView.right + dX, itemView.top.toFloat(), itemView.right.toFloat(), itemView.bottom.toFloat())
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
return
}
// Draw the red delete background
background.color = backgroundColor
background.setBounds(itemView.right + dX.toInt(), itemView.top, itemView.right, itemView.bottom)
background.draw(c)
// Calculate position of delete icon
val deleteIconTop = itemView.top + (itemHeight - intrinsicHeight) / 2
val deleteIconMargin = (itemHeight - intrinsicHeight) / 2
val deleteIconLeft = itemView.right - deleteIconMargin - intrinsicWidth
val deleteIconRight = itemView.right - deleteIconMargin
val deleteIconBottom = deleteIconTop + intrinsicHeight
// Draw the delete icon
deleteIcon!!.setBounds(deleteIconLeft, deleteIconTop, deleteIconRight, deleteIconBottom)
deleteIcon.draw(c)
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
}
private fun clearCanvas(c: Canvas?, left: Float, top: Float, right: Float, bottom: Float) {
c?.drawRect(left, top, right, bottom, clearPaint)
}
}
This is the fragment i use that class in (i didn't put all the code in here because most of it has nothing to do with the question):
class HomeFragment : Fragment() {
private lateinit var adapter: ListAdapter
private lateinit var recyclerView: RecyclerView
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
_binding = FragmentHomeBinding.inflate(inflater, container, false)
adapter = ListAdapter()
recyclerView = binding.recyclerView
recyclerView.adapter = adapter
recyclerView.layoutManager = LinearLayoutManager(requireActivity())
recyclerView.apply {
ItemTouchHelper(deleteSwipeHandler).attachToRecyclerView(this)
}
mItemViewModel = ViewModelProvider(this)[ItemViewModel::class.java]
mItemViewModel.fetchAllItems.observe(viewLifecycleOwner) { item ->
adapter.setData(item)
binding.tvHelp.isInvisible = adapter.itemCount > 0
}
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
binding.fab.setOnClickListener {
if (ContextCompat.checkSelfPermission(
requireActivity(),
Manifest.permission.CAMERA
) == PERMISSION_GRANTED
) {
intentAndFileProvider()
} else {
requestPermissions(arrayOf(Manifest.permission.CAMERA), CAMERA_PERMISSION_CODE)
}
}
}
private val deleteSwipeHandler = object : SwipeToDeleteCallback(context) {
override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
val pos = viewHolder.layoutPosition
val item = adapter.itemList[pos]
mItemViewModel.deleteItem(item)
Snackbar.make(requireView(), "Successfully deleted!", Snackbar.LENGTH_LONG).apply {
setAction("Undo") {
mItemViewModel.addItem(item)
}
}.show()
}
}
}
Pls help me out here! I appreciate every answer & comment!