Splitted and added UWP project

GUT.Schedule/GUTSchedule.Droid/Fragments/DatePickerFragment.cs

@@ -0,0 +1,50 @@
+using System;
+using Android.OS;
+using Android.Widget;
+using Android.App;
+using System.Threading.Tasks;
+using Android.Content;
+
+namespace GUTSchedule.Droid.Fragments
+{
+	/// <summary>
+	/// Date picker
+	/// </summary>
+	public class DatePickerFragment : Android.Support.V4.App.DialogFragment, DatePickerDialog.IOnDateSetListener
+	{
+		DateTime _date;
+		bool dismissed = false;
+		public override Dialog OnCreateDialog(Bundle savedInstanceState) =>
+			new DatePickerDialog(Activity, this, _date.Year, _date.Month - 1, _date.Day);
+
+		// Occures when user selected a date
+		public void OnDateSet(DatePicker view, int year, int month, int dayOfMonth)
+		{
+			_date = view.DateTime;
+			dismissed = true;
+		}
+
+		public override void OnCancel(IDialogInterface dialog)
+		{
+			base.OnCancel(dialog);
+			dismissed = true;
+		}
+
+		/// <summary>
+		/// Shows date picker and waits for user input
+		/// </summary>
+		/// <param name="manager">Fragment manager of the current activity (In most common cases it is <c>this.FragmentManager</c>)</param>
+		/// <param name="date">Date which is to be selected by default</param>
+		/// <returns><see cref="DateTime"/> picked by user</returns>
+		public async Task<DateTime> GetDate(Android.Support.V4.App.FragmentManager manager, DateTime date)
+		{
+			_date = date;
+			Show(manager, "datePicker");
+
+			while (!dismissed)
+				await Task.Delay(100);
+
+			return _date;
+		}
+	}
+}