android - 如何在时间选择器中将文本 “cancel”更改为android kotlin中的另一个文本？

Question

  class DatePickerFragment : DialogFragment(), DatePickerDialog.OnDateSetListener {

        override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
            val c: Calendar = Calendar.getInstance()
            val year: Int = c.get(Calendar.YEAR)
            val month: Int = c.get(Calendar.MONTH)
            val day: Int = c.get(Calendar.DAY_OF_MONTH)
            return DatePickerDialog(getActivity()!!, this, year, month, day)
        }

        override fun onDateSet(view: DatePicker, year: Int, month: Int, day: Int) {
            val tv: TextView = activity!!.findViewById(R.id.txt_date_picker) as TextView
            tv.setText("$day - $month - $year")
        }

        override fun onCancel(dialog: DialogInterface?) {
            Toast.makeText(activity,"date picker Canceled.", Toast.LENGTH_SHORT).show()
            super.onCancel(dialog)

        }
    }

编辑:尝试答案后的所有代码:

class TimePickerFragment: DialogFragment(), TimePickerDialog.OnTimeSetListener{
    private lateinit var calendar:Calendar

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        calendar = Calendar.getInstance()


        val hour = calendar.get(Calendar.HOUR_OF_DAY)
        val minute = calendar.get(Calendar.MINUTE)


        return TimePickerDialog(
            activity, // Context
            android.R.style.Theme_Holo_Light_Dialog_NoActionBar_MinWidth, // Theme
            this, // TimePickerDialog.OnTimeSetListener
            hour, // Hour of day
            minute, // Minute
            false // Is 24 hour view
        )//.apply {
          //  getButton(DialogInterface.BUTTON_NEGATIVE).setText(R.string.myCancelString)
       // }


    }


    override fun onTimeSet(view: TimePicker, hourOfDay: Int, minute: Int) {
        // Do something with the returned time
        val tv:TextView = activity.findViewById(R.id.end) as TextView
      //  tv.text = "${getHourAMPM(hourOfDay)}:$minute ${getAMPM(hourOfDay)}"
        tv.text = "$hourOfDay:$minute "
    }

}

Answer 1

创建对话框后，您可以获取按钮并更改其文本，这发生在onStart()中:

override fun onStart() {
    super.onStart()
    (dialog as? DatePickerDialog)
        ?.getButton(DialogInterface.BUTTON_NEGATIVE)
        ?.setText(R.string.myCancelString)
}