Add date & time helper classes

app/src/main/java/net/pokeranalytics/android/util/DatePickerFragment.kt

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+package net.pokeranalytics.android.util
+
+import android.app.DatePickerDialog
+import android.app.Dialog
+import android.os.Bundle
+import android.widget.DatePicker
+import androidx.fragment.app.DialogFragment
+import java.util.*
+
+class DatePickerFragment : DialogFragment(), DatePickerDialog.OnDateSetListener {
+
+	override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+		// Use the current date as the default date in the picker
+		val c = Calendar.getInstance()
+		val year = c.get(Calendar.YEAR)
+		val month = c.get(Calendar.MONTH)
+		val day = c.get(Calendar.DAY_OF_MONTH)
+
+		// Create a new instance of DatePickerDialog and return it
+		return DatePickerDialog(activity, this, year, month, day)
+	}
+
+	override fun onDateSet(view: DatePicker, year: Int, month: Int, day: Int) {
+		// Do something with the date chosen by the user
+	}
+}

app/src/main/java/net/pokeranalytics/android/util/TimePickerFragment.kt

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+package net.pokeranalytics.android.util
+
+import android.app.Dialog
+import android.app.TimePickerDialog
+import android.os.Bundle
+import android.text.format.DateFormat
+import android.widget.TimePicker
+import androidx.fragment.app.DialogFragment
+import java.util.*
+
+class TimePickerFragment : DialogFragment(), TimePickerDialog.OnTimeSetListener {
+
+	override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+		// Use the current time as the default values for the picker
+		val c = Calendar.getInstance()
+		val hour = c.get(Calendar.HOUR_OF_DAY)
+		val minute = c.get(Calendar.MINUTE)
+
+		// Create a new instance of TimePickerDialog and return it
+		return TimePickerDialog(activity, this, hour, minute, DateFormat.is24HourFormat(activity))
+	}
+
+	override fun onTimeSet(view: TimePicker, hourOfDay: Int, minute: Int) {
+		// Do something with the time chosen by the user
+	}
+}