MainActivity 代码:
public class MainActivity : Activity
{
TextView _dateDisplay;
Button _dateSelectButton;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
_dateDisplay = FindViewById<TextView>(Resource.Id.date_display);
_dateSelectButton = FindViewById<Button>(Resource.Id.date_select_button);
_dateSelectButton.Click += DateSelect_OnClick;
}
void DateSelect_OnClick(object sender, EventArgs eventArgs)
{
DatePickerFragment frag = DatePickerFragment.NewInstance(delegate (DateTime time)
{
_dateDisplay.Text = time.ToLongDateString();
});
frag.Show(FragmentManager, DatePickerFragment.TAG);
}
}
DatePickerFragment.cs 代码:
public class DatePickerFragment : DialogFragment, DatePickerDialog.IOnDateSetListener
{
// TAG can be any string of your choice.
public static readonly string TAG = "X:" + typeof(DatePickerFragment).Name.ToUpper();
// Initialize this value to prevent NullReferenceExceptions.
Action<DateTime> _dateSelectedHandler = delegate { };
public static DatePickerFragment NewInstance(Action<DateTime> onDateSelected)
{
DatePickerFragment frag = new DatePickerFragment();
frag._dateSelectedHandler = onDateSelected;
return frag;
}
public override Dialog OnCreateDialog(Bundle savedInstanceState)
{
DateTime currently = DateTime.Now;
DatePickerDialog dialog = new DatePickerDialog(Activity,
this,
currently.Year,
currently.Month - 1,
currently.Day);
return dialog;
}
public void OnDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth)
{
// Note: monthOfYear is a value between 0 and 11, not 1 and 12!
DateTime selectedDate = new DateTime(year, monthOfYear + 1, dayOfMonth);
Log.Debug(TAG, selectedDate.ToLongDateString());
_dateSelectedHandler(selectedDate);
}
}
Main.axml 代码:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="@dimen/top_padding">
<TextView
android:id="@+id/date_display"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:paddingTop="@dimen/top_padding"
android:text="@string/selected_date_text"
style="@android:style/TextAppearance.Large" />
<Button
android:id="@+id/date_select_button"
android:paddingLeft="@dimen/left_padding"
android:paddingRight="@dimen/right_padding"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/pick_date_text"
android:layout_below="@id/date_display" />
</RelativeLayout>
实现结果:
参考文献:
https://docs.microsoft.com/zh-cn/xamarin/android/user-interface/controls/pickers/date-picker