Kotlin

Question

我正在创建一个高尔夫记分卡应用程序。每个洞的分数都是一个空的 textView，而该 textView 有一个 setOnClickListener 来打开分数选择器对话框。我想从分数选择器对话框中获取分数值。

对话界面如下： https://i.stack.imgur.com/VNVc1.png

每个按钮对应一个分数。

我知道每个按钮都需要一个 setOnClickListener，但我对之后的其他一切了解有限。

所以我的问题是如何 return 该得分值，以便我可以在特定的 textView 中显示它并将其添加到玩家的总分中？任何建议都会很有帮助。

感谢您的宝贵时间。

Answer 1

您可以实现自定义监听器，您需要的监听器以下代码用于演示，在 dialogfragment

中实现

//score for current hole dialog
class SomeDialog:DialogFragment() {
    private var dl: CustomListener? = null

    // interface to detect dialog close event
    interface CustomListener {
        fun closeEvent(id: String, valueToPass: Int)
    }

    fun customListerTrig(l: CustomListener) {
        dl = l
    }


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


        button1.setOnClickListener {
            dl?.closeEvent("golfDiag", 1)
            this.dismiss()
        }
        button2.setOnClickListener {
            dl?.closeEvent("golfDiag", 2)
            this.dismiss()

        }
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_some_dialog, container, false)
    }

}

我如何调用和检索按钮点击事件

 val common = SomeDialog()
     common.customListerTrig(object : CommonInfoDialog.CustomListener {
            override fun closeEvent(id: String, buttonValueFromDialog: Int) {
                // todo usebuttonValueFromDialog
            }
      })
      //use fragment according where this dialog will be called.
      common.show(this.childFragmentManager, "golfDiag")

Answer 2

可能这段代码对您来说很简单。使用 Android 对话框 API 让您的工作更轻松。

   /**
     * e.g.
    showPickScoreDialog(requireContext()) { score ->
        Toast.makeText(context, "score[$score]", Toast.LENGTH_LONG).show()
    }
     */
    fun showPickScoreDialog(context: Context, callback: (Int) -> Unit) {
        val defaultCheckedScore = -1
        val scoreList = getScoreList()
        MaterialAlertDialogBuilder(context)
            .setTitle("Score For Current Hole:")
            .setSingleChoiceItems(scoreList, defaultCheckedScore) { dialog: DialogInterface?, which: Int ->
                val score = scoreList[which].toInt()
                callback(score)
                dialog?.dismiss()
            }
            .setNegativeButton("Cancel", null)
            .show()
    }

    private fun getScoreList(): Array<String> {
        val list = mutableListOf<String>()
        for (i in 1..12) {
            list.add(i.toString())
        }
        return list.toTypedArray()
    }

Answer 3

So my question is how to return that score value so I can display it in that specific the textView and add it to the player's total? Any suggestions would be very helpful.

https://developer.android.com/guide/topics/ui/dialogs#PassingEvents

Kotlin - 如何从对话框中的按钮选择中获取价值？

Kotlin - How to get value from button choice in Dialog?

android

dialog