Android (TimePicker)

Question

我在Kotlin用安卓显示DialogFragment时遇到了问题。到目前为止，我得到的是：

The 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fragmentManager替换this@AddTimer.fragmentManager，但这似乎不是解决方案。

我现在很无知，因为Android说我必须使用FragmentManager!作为第一个参数，但我使用的是一个参数，对吗？

Answer 1

Aliaksandr Kavalenka想出了一个很好的解决办法，这是为一个日期选择者而设计的。我用时间选择器格式化了他的想法：

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()
    }
}

Answer 2

也许这对你有帮助

我有一个函数getDate()

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

        val cal = Calendar.getInstance()

        val dateSetListener = DatePickerDialog.OnDateSetListener { view, year, monthOfYear, dayOfMonth ->
            cal.set(Calendar.YEAR, year)
            cal.set(Calendar.MONTH, monthOfYear)
            cal.set(Calendar.DAY_OF_MONTH, dayOfMonth)

            textView.text = SimpleDateFormat("dd.MM.yyyy").format(cal.time)

        }

        textView.setOnClickListener {
            DatePickerDialog(context, dateSetListener,
                    cal.get(Calendar.YEAR),
                    cal.get(Calendar.MONTH),
                    cal.get(Calendar.DAY_OF_MONTH)).show()
        }
    }

如果一个活动需要调用DatePickerDialog -我只是使用我的函数

presenter.getDate(textViewTime, this)

演示者-它是对象，我的函数getDate在哪里？

Answer 3

看起来您将常规的DialogFragment和支持的Lib片段混合在一起。您应该扩展"android.support.v4.app.DialogFragment“而不是”导入android.app.DialogFragment“。

Support使用支持库版本FragmentManager，而不是常规片段管理器。

希望这能有所帮助。