Android Kotlin DialogFragment (TimePicker)

Question

我在使用 Kotlin 中的 Android 显示 DialogFragment 时遇到问题。这是我到目前为止得到的:

TimePickerFragment.kt

package de.flokol120.UniversalSleepTimer

import android.app.Dialog
import android.app.DialogFragment
import android.widget.TimePicker
import android.app.TimePickerDialog
import android.os.Bundle
import android.text.format.DateFormat
import java.util.*


/**
 * @author flokol120
 * TimePicker Fragment to get the time
 */
class TimePickerFragment : DialogFragment(), TimePickerDialog.OnTimeSetListener {

    override fun onCreateDialog(savedInstanceState: Bundle): Dialog {
        val c = Calendar.getInstance()
        val hour = c.get(Calendar.HOUR_OF_DAY)
        val minute = c.get(Calendar.MINUTE)

        return TimePickerDialog(getActivity(), this, hour, minute,
                DateFormat.is24HourFormat(getActivity()))
    }

    override fun onTimeSet(view: TimePicker, hourOfDay: Int, minute: Int) {
        //TODO add this
    }
}

和AddTimer.kt

package de.flokol120.UniversalSleepTimer

import android.os.Bundle
import android.support.v4.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button


/**
 * @author flokol120
 * the fragment which adds a simple kill Timer
 */
class AddTimer : Fragment() {

    lateinit var timePicker : Button

    override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        val v = inflater!!.inflate(R.layout.fragment_add_timer, container, false)

        timePicker = v.findViewById(R.id.timePicker)

        timePicker.setOnClickListener {
            val newFragment = TimePickerFragment()
            newFragment.show(fragmentManager, "timePicker")
        }

        return v
    }

}

我也尝试用 this@AddTimer.fragmentManager 替换 fragmentManager 但这似乎不是解决方案。

我现在很无能，因为 Android Studio 说我必须使用 FragmentManager! 作为第一个参数，但我正在使用一个，对吗？

Answer 1

Aliaksandr Kavalenka想出了一个巧妙的解决方法，用于日期选择器。我将他的想法格式化为与时间选择器一起工作:

fun getTime(textView: TextView, context: Context){

    val cal = Calendar.getInstance()

    val timeSetListener = TimePickerDialog.OnTimeSetListener { timePicker, hour, minute ->
        cal.set(Calendar.HOUR_OF_DAY, hour)
        cal.set(Calendar.MINUTE, minute)

        textView.text = SimpleDateFormat("HH:mm").format(cal.time)
    }

    textView.setOnClickListener {
        TimePickerDialog(context, timeSetListener, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), true).show()
    }
}