chore: native timepicker- set -initial time

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_TimePicker.cs

@@ -12,6 +12,7 @@
 using MUXControlsTestApp.Utilities;
 using Private.Infrastructure;
 using SamplesApp.UITests;
+using Uno.UI.Extensions;
 using Uno.UI.RuntimeTests.Helpers;
 using Uno.UI.RuntimeTests.MUX.Helpers;
 
@@ -288,10 +289,86 @@ private async Task When_Native_Flyout_Theme(UIKit.UIUserInterfaceStyle expectedS
 			Assert.AreEqual(expectedStyle, nativeTimePicker.OverrideUserInterfaceStyle);
 		}
 #endif
-	}
+#if __IOS__ || __ANDROID__
+		[TestMethod]
+		public async Task When_Time_Uninitialized_Should_Display_Current_Time()
+		{
+			var timePicker = new Microsoft.UI.Xaml.Controls.TimePicker();
+			timePicker.Time = new TimeSpan(TimePicker.DEFAULT_TIME_TICKS);
 
-	class MyContext
-	{
-		public object StartTime => null;
+			var expectedCurrentTime = GetCurrentTime();
+
+			TestServices.WindowHelper.WindowContent = timePicker;
+			await TestServices.WindowHelper.WaitForLoaded(timePicker);
+
+			await DateTimePickerHelper.OpenDateTimePicker(timePicker);
+
+			var openFlyouts = FlyoutBase.OpenFlyouts;
+			var associatedFlyout = openFlyouts[0];
+			Assert.IsInstanceOfType(associatedFlyout, typeof(NativeTimePickerFlyout));
+
+#if __ANDROID__
+			var nativeFlyout = (NativeTimePickerFlyout)associatedFlyout;
+
+			var dialog = nativeFlyout.GetNativeDialog();
+
+			var decorView = dialog.Window?.DecorView;
+			var timePickerView = FindTimePicker(decorView);
+
+			var displayedHour = timePickerView.GetHourCompat();
+			var displayedMinute = timePickerView.GetMinuteCompat();
+
+			Assert.AreEqual(expectedCurrentTime.Hours, displayedHour, "Hours should match the current time.");
+			Assert.AreEqual(expectedCurrentTime.Minutes, displayedMinute, "Minutes should match the current time.");
+#elif __IOS__
+			var nativeFlyout = (NativeTimePickerFlyout)associatedFlyout;
+
+			var timeSelector = nativeFlyout.GetTimeSelector();
+			var displayedTime = timeSelector.Time;
+
+			Assert.AreEqual(expectedCurrentTime.Hours, displayedTime.Hours, "Hours should match the current time.");
+			Assert.AreEqual(expectedCurrentTime.Minutes, displayedTime.Minutes, "Minutes should match the current time.");
+#endif
+		}
+
+		private TimeSpan GetCurrentTime()
+		{
+			var calendar = new global::Windows.Globalization.Calendar();
+			calendar.SetToNow();
+			var now = calendar.GetDateTime();
+			return new TimeSpan(now.Hour, now.Minute, now.Second);
+		}
+#if __ANDROID__
+		private Android.Widget.TimePicker FindTimePicker(Android.Views.View root)
+		{
+			if (root is Android.Widget.TimePicker picker)
+			{
+				return picker;
+			}
+
+			if (root is not Android.Views.ViewGroup viewGroup)
+			{
+				return null;
+			}
+
+			for (var i = 0; i < viewGroup.ChildCount; i++)
+			{
+				var child = viewGroup.GetChildAt(i);
+				var result = FindTimePicker(child);
+				if (result != null)
+				{
+					return result;
+				}
+			}
+
+			return null;
+		}
+#endif
+#endif
+
+		class MyContext
+		{
+			public object StartTime => null;
+		}
 	}
 }

src/Uno.UI/UI/Xaml/Controls/TimePicker/NativeTimePickerFlyout.Android.cs

@@ -16,9 +16,16 @@ partial class NativeTimePickerFlyout
 	private TimeSpan _initialTime;
 
 	internal bool IsNativeDialogOpen => _dialog?.IsShowing ?? false;
+	internal UnoTimePickerDialog GetNativeDialog() => _dialog;
+
 
 	internal protected override void Open()
 	{
+		if (Time.Ticks == TimePicker.DEFAULT_TIME_TICKS)
+		{
+			Time = GetCurrentTime();
+		}
+
 		SaveInitialTime();
 
 		ShowTimePicker();
@@ -28,6 +35,7 @@ internal protected override void Open()
 
 	private void SaveInitialTime() => _initialTime = Time;
 
+
 	private void SaveTime(TimeSpan time)
 	{
 		if (Time != time)
@@ -58,7 +66,7 @@ private void AdjustAndSaveTime(int hourOfDay, int minutes)
 
 	private void ShowTimePicker()
 	{
-		var time = Time.RoundToNextMinuteInterval(MinuteIncrement);
+		var time = _initialTime.RoundToNextMinuteInterval(MinuteIncrement);
 		var listener = new OnSetTimeListener((view, hourOfDay, minute) => AdjustAndSaveTime(hourOfDay, minute));
 
 		var themeResourceId = CoreApplication.RequestedTheme == Uno.Helpers.Theming.SystemTheme.Light ?

src/Uno.UI/UI/Xaml/Controls/TimePicker/NativeTimePickerFlyout.cs

@@ -1,7 +1,16 @@
-using Microsoft.UI.Xaml.Controls.Primitives;
+using System;
+using Windows.Globalization;
+using Microsoft.UI.Xaml.Controls.Primitives;
 
 namespace Microsoft.UI.Xaml.Controls;
 
 internal partial class NativeTimePickerFlyout : TimePickerFlyout
 {
+	protected TimeSpan GetCurrentTime()
+	{
+		var calendar = new Calendar();
+		calendar.SetToNow();
+		var currentDateTime = calendar.GetDateTime();
+		return new TimeSpan(currentDateTime.Hour, currentDateTime.Minute, currentDateTime.Second);
+	}
 }

src/Uno.UI/UI/Xaml/Controls/TimePicker/NativeTimePickerFlyout.iOS.cs

@@ -21,6 +21,8 @@ partial class NativeTimePickerFlyout
 	private FlyoutPresenter? _timePickerPresenter;
 	private bool _isInitialized;
 
+	internal TimePickerSelector? GetTimeSelector() => _timeSelector;
+
 	protected override void InitializePopupPanel()
 	{
 		_popup.PopupPanel = new PickerFlyoutPopupPanel(this)
@@ -144,6 +146,11 @@ void onUnload(object sender, RoutedEventArgs e)
 
 	protected internal override void Open()
 	{
+		if (Time.Ticks == TimePicker.DEFAULT_TIME_TICKS)
+		{
+			Time = GetCurrentTime();
+		}
+
 		InitializeContent();
 
 		_timeSelector?.Initialize();

src/Uno.UI/UI/Xaml/Controls/TimePicker/TimePicker.native.cs

@@ -12,6 +12,7 @@ namespace Microsoft.UI.Xaml.Controls;
 
 partial class TimePicker
 {
+	internal const long DEFAULT_TIME_TICKS = -1;
 	#region FlyoutPlacement DependencyProperty
 
 	[UnoOnly]