BottomSheetDialog

class ExampleBottomSheetDialog : BottomSheetDialogFragment() {
     lateinit var mListener:BottomSheetListener

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        val binding = FragmentSelectedItemListDialogItemBinding.inflate(inflater,container,false)
        Log.d(TAG,"onCreateView")
        Toast.makeText(requireContext(),"OnCreateView",Toast.LENGTH_SHORT).show()

        binding.button1.setOnClickListener {
            mListener.onButtonClicked("Button 1 Clicked")
            dismiss()
        }
        binding.button2.setOnClickListener {
            mListener.onButtonClicked("Button 2 Clicked")
            dismiss()
        }

        return binding.root
    }


    override fun onAttachFragment(childFragment: Fragment) {
        super.onAttachFragment(childFragment)
        Log.d(TAG,"onAttachFragment")
        Toast.makeText(requireContext(),"onAttachFragment",Toast.LENGTH_SHORT).show()
        try{
            mListener = childFragment as BottomSheetListener
        }catch (e:ClassCastException){
            throw ClassCastException("$childFragment must implement BottomSheetListener")
        }
    }

    interface BottomSheetListener{
        fun onButtonClicked(text:String)
    }
    companion object{
        const val TAG = "ExampleBottomSheetDialo"
    }
}


#The Fragment that calls the BottomSheet


class SelectedItemFragment : BottomSheetDialogFragment(),ExampleBottomSheetDialog.BottomSheetListener {
    private lateinit var binding:FragmentSelectedItemListDialogBinding

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View {
         binding = FragmentSelectedItemListDialogBinding.inflate(inflater,container,false)

        binding.buttonOpenBottomSheet.setOnClickListener {
            val bottomSheet = ExampleBottomSheetDialog()
            bottomSheet.show(parentFragmentManager,"ExampleBottomSheet")
        }

        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {

    }


    companion object {

        // TODO: Customize parameters
        fun newInstance(itemCount: Int): SelectedItemFragment =
                SelectedItemFragment().apply {
                    arguments = Bundle().apply {
                        putInt(ARG_ITEM_COUNT, itemCount)
                    }
                }

    }

    override fun onButtonClicked(text: String) {
        binding.textViewButtonClicked.text = text
    }
}