如何将数据从主机片段传递到 kotlin 中的对话框片段？

Question

我有一个 RecylcerView，单击该视图应该将用户带到一个对话框片段，用户将能够在其中编辑视图的内容。 因此，我需要将数据作为数据 class DressMeasurementModel 从主机片段传递到对话片段。

我怎样才能做到这一点？

    // This property is only valid between onCreateView and onDestroyView.
    private val binding get() = _binding!!
    private lateinit var addMeasurementFab: FloatingActionButton
    private lateinit var display:TextView
    private lateinit var myAdapter: AddMeasurementAdapter
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        _binding = MeasurementsFragmentBinding.inflate(inflater, container, false)
        return binding.root
    }

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


        val recyclerView = binding.measurementsFragmentRecyclerView
        myAdapter = AddMeasurementAdapter(currentList,this@MeasurementsFragment, this@MeasurementsFragment)
        recyclerView.adapter = myAdapter
        recyclerView.layoutManager = StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL)
    }

    override fun onItemClicked1(dressMeasurementModel: DressMeasurementModel) {
        val data = DressMeasurementModel(dressMeasurementModel.measurementName, dressMeasurementModel.measurement)
        val bundle = bundleOf("editData" to data)
        setFragmentResult("editData_key", bundle)
        EditMeasurementDialogFragment().show(childFragmentManager, "Dialog tag")
    }
}

Answer 1

add this into your dialog fragment

    companion object {

    private const val ITEMS = "data"

    fun newInstance(data : DressMeasurementModel): EditMeasurementDialogFragment= EditMeasurementDialogFragment().apply {
        arguments = Bundle().apply {
            putString(ITEMS, Gson().toJson(data))
        }
    }
}

并从您的片段中调用此片段对话框

     val dialog = EditMeasurementDialogFragment.newInstance(items)
     dialog.show(childFragmentManager, "dialog")

// 在开始或创建时将参数放入对话框片段

  val data = argument?.getString(ITEMS)
  val model = Gson().fromJson(data,DressMeasurementModel::class.java)

// 或者您可以简单地将 model 或数据传递到主要结构中，例如

     class EditMeasurementDialogFragment(data: DressMeasurementModel)

Answer 2

让您的 Dialog class 带有您想要数据的构造函数：

class EditMeasurementDialogFragment(data: DressMeasurementModel)

您可以在构造函数中传递它，如下所示：

 val data = DressMeasurementModel(dressMeasurementModel.measurementName, dressMeasurementModel.measurement)
EditMeasurementDialogFragment(data).show(childFragmentManager, "Dialog tag")