微调器使用 onItemSelectedListener 崩溃

Question

美好的一天我有一个自定义微调器，它可以毫无问题地显示字符串数组。但是当我添加 onItemSelectedListener 时，我的应用程序会在加载片段时崩溃。

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
  auth = Firebase.auth
  // show back button
  val activity = activity as? MainActivity
  activity?.supportActionBar?.setDisplayHomeAsUpEnabled(true)

  val result = inflater.inflate(R.layout.fragment_new_key, container, false)

  val spinner: Spinner = result.findViewById(R.id.spinner_Category)
  ArrayAdapter.createFromResource(
     requireContext(), R.array.keyCategory, R.layout.spinner_item
                                 ).also { adapter ->
     spinner.adapter = adapter
  }
  // without adding the below, the application will work smoothly
  spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
     override fun onNothingSelected(parent: AdapterView<*>?) {
        TODO("Not yet implemented")
     }

     override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
        TODO("Not yet implemented")
     }

  }
  return result

}

能否请您帮忙，是否存在与推动应用程序崩溃的微调器冲突的问题？

谢谢。

Answer 1

删除这些行

TODO("Not yet implemented")

TODO 抛出 NotImplementedError

微调器使用 onItemSelectedListener 崩溃

spinner crashing using onItemSelectedListener

android

spinner

kotlin