//fragment

public class TimePickerFragment : DialogFragment,

TimePickerDialog.IOnTimeSetListener

{

// TAG can be any string of your choice.

public static readonly string TAG = "X:" + typeof(TimePickerFragment).Name.ToUpper();

// Initialize this value to prevent NullReferenceExceptions.

Action<string> _dateSelectedHandler = delegate { };

public static TimePickerFragment NewInstance(Action<string> OnTimeSet)

{

TimePickerFragment frag = new TimePickerFragment();

frag._dateSelectedHandler = OnTimeSet;

return frag;

}

public override Dialog OnCreateDialog(Bundle savedInstanceState)

{

DateTime currently = DateTime.Now;

TimePickerDialog dialog = new TimePickerDialog(Activity,this,

currently.Hour,

currently.Minute,

false);

return dialog;

}

public void OnTimeSet(TimePicker view, int hourOfDay, int minute)

{

// DateTime selectedDate = new DateTime(year, monthOfYear + 1, dayOfMonth);

// Log.Debug(TAG, selectedDate.ToLongDateString());

string time = string.Format("{0}:{1}", hourOfDay, minute.ToString().PadLeft(2, '0'));

_dateSelectedHandler(time);

}

}

//Call Fragment

TimePickerFragment frag = TimePickerFragment.NewInstance(delegate (string time)

{

button.Text = time ;

});

frag.Show(FragmentManager, TimePickerFragment.TAG);