处理对话框片段中的外部单击-解网

问：

我希望在点击对话框片段外部时出现一个确认对话框，询问“您确定要退出而不保存吗？当用户按下“是”按钮时，我希望关闭对话框片段。否则，如果他们关闭确认对话框，我希望它关闭，使原始对话框片段保持打开状态。棘手的部分是，在对话框片段外部点击不应关闭片段本身，而应触发确认对话框。我怎样才能做到这一点？这是我的对话片段：

@AndroidEntryPoint
class ConfessAnswerFragment(
    private val onUpdateItem: (position: Int, updatedConfession: Confession) -> Unit,
    private val findItemById: (confessionId: String) -> Int
) : DialogFragment() {

    private lateinit var binding: FragmentConfessAnswerBinding
    private lateinit var navRegister: FragmentNavigation
    private val viewModel: ConfessViewModel by viewModels()
    private var isAnswerButtonEnabled = false
    private var isEditAnswer: Boolean = false
    private var isAnswerFavorited: Boolean = false
    private lateinit var currentUserUid: String
    private lateinit var confessionId: String
    private lateinit var answerDate: String
    private lateinit var dialogHelper: DialogTemplate

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {

        binding = FragmentConfessAnswerBinding.inflate(inflater, container, false)
        navRegister = activity as FragmentNavigation
        setHasOptionsMenu(true)
        confessionId = arguments?.getString("confessionId", "") ?: ""
        currentUserUid = arguments?.getString("currentUserUid", "") ?: ""
        answerDate = arguments?.getString("answerDate", "") ?: ""
        dialogHelper = DialogTemplate(requireContext())

        getConfession(confessionId)

        return binding.root
    }
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        observeGetConfession()
        observeAddAnswer()
        observeFavorite()
        observeDeleteAnswer()
    }
...

android kotlin android-fragments

private fun showConfirmationDialog() {
    // It will listen for all touches.
    // We do not want it to be triggered when clicking the yes or no buttons in the AlertDialog.
    clearOutSideTouchListener()

    val builder = AlertDialog.Builder(requireContext())
    builder.setMessage("Are you sure you want to exit without saving?")
        .setPositiveButton("Yes") { _, _ ->
            dismiss()
        }
        .setNegativeButton("No") { dialog, _ ->
            dialog.dismiss()

            //We have to activate it again.
            setOutsideTouchListener()
        }

    val dialog = builder.create()
    dialog.setCanceledOnTouchOutside(false)

    dialog.show()
}

外部触摸侦听器

private fun setOutsideTouchListener() {
    val outsideTouchListener = View.OnTouchListener { _, _ ->
        showConfirmationDialog()
        true
    }
    dialog?.window?.decorView?.setOnTouchListener(outsideTouchListener)
}

清晰触摸侦听器

private fun clearOutSideTouchListener() {
    dialog?.window?.decorView?.setOnTouchListener(null)
}

处理对话框片段中的外部单击

Handling Outside Clicks in Dialog Fragment

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