Implement TitleColor property in PickerHandlers

src/Controls/samples/Controls.Sample/Pages/MainPage.cs

@@ -130,7 +130,6 @@ void SetupMauiLayout()
 			verticalStack.Add(new Editor { Text = "Lorem ipsum dolor sit amet", FontSize = 10, FontFamily = "dokdo_regular" });
 			verticalStack.Add(new Editor { Text = "ReadOnly Editor", IsReadOnly = true });
 
-
 			var entry = new Entry();
 			entry.TextChanged += (sender, e) =>
 			{
@@ -161,7 +160,6 @@ void SetupMauiLayout()
 			placeholderSearchBar.Placeholder = "Placeholder";
 			verticalStack.Add(placeholderSearchBar);
 
-
 			var monkeyList = new List<string>
 			{
 				"Baboon",
@@ -173,7 +171,7 @@ void SetupMauiLayout()
 				"Japanese Macaque"
 			};
 
-			var picker = new Picker { Title = "Select a monkey", FontFamily = "Dokdo" };
+			var picker = new Picker { Title = "Select a monkey", TitleColor = Color.Red, FontFamily = "Dokdo" };
 
 			picker.ItemsSource = monkeyList;
 			verticalStack.Add(picker);

src/Core/src/Core/IPicker.cs

@@ -13,6 +13,11 @@ public interface IPicker : IView, ITextStyle
 		/// </summary>
 		string Title { get; }
 
+		/// <summary>
+		/// Gets the color for the Picker title.
+		/// </summary>
+		Color TitleColor { get; }
+
 		/// <summary>
 		/// Gets or sets the internal list of items to template and display.
 		/// </summary>

src/Core/src/Handlers/Picker/PickerHandler.Android.cs

@@ -2,7 +2,9 @@
 using System.Collections.Specialized;
 using System.Linq;
 using Android.App;
-using Microsoft.Extensions.DependencyInjection;
+using Android.Content.Res;
+using Android.Text;
+using Android.Text.Style;
 using AResource = Android.Resource;
 
 namespace Microsoft.Maui.Handlers
@@ -11,6 +13,8 @@ public partial class PickerHandler : ViewHandler<IPicker, MauiPicker>
 	{
 		AlertDialog? _dialog;
 
+		static ColorStateList? DefaultTitleColors { get; set; }
+
 		protected override MauiPicker CreateNativeView() =>
 			new MauiPicker(Context);
 
@@ -35,11 +39,24 @@ protected override void DisconnectHandler(MauiPicker nativeView)
 
 			base.DisconnectHandler(nativeView);
 		}
+
+		protected override void SetupDefaults(MauiPicker nativeView)
+		{
+			base.SetupDefaults(nativeView);
+
+			DefaultTitleColors = nativeView.HintTextColors;
+		}
+
 		public static void MapTitle(PickerHandler handler, IPicker picker)
 		{
 			handler.NativeView?.UpdateTitle(picker);
 		}
 
+		public static void MapTitleColor(PickerHandler handler, IPicker picker)
+		{
+			handler.NativeView?.UpdateTitleColor(picker, DefaultTitleColors);
+		}
+
 		public static void MapSelectedIndex(PickerHandler handler, IPicker picker)
 		{
 			handler.NativeView?.UpdateSelectedIndex(picker);
@@ -86,16 +103,25 @@ void OnClick(object? sender, EventArgs e)
 			{
 				using (var builder = new AlertDialog.Builder(Context))
 				{
-					builder.SetTitle(VirtualView.Title ?? string.Empty);
+					if (VirtualView.TitleColor == Color.Default)
+					{
+						builder.SetTitle(VirtualView.Title ?? string.Empty);
+					}
+					else
+					{
+						var title = new SpannableString(VirtualView.Title ?? string.Empty);
+						title.SetSpan(new ForegroundColorSpan(VirtualView.TitleColor.ToNative()), 0, title.Length(), SpanTypes.ExclusiveExclusive);
+						builder.SetTitle(title);
+					}
 
 					string[] items = VirtualView.Items.ToArray();
 
-					builder.SetItems(items, (EventHandler<Android.Content.DialogClickEventArgs>)((s, e) =>
+					builder.SetItems(items, (s, e) =>
 					{
 						var selectedIndex = e.Which;
 						VirtualView.SelectedIndex = selectedIndex;
 						base.NativeView?.UpdatePicker(VirtualView);
-					}));
+					});
 
 					builder.SetNegativeButton(AResource.String.Cancel, (o, args) => { });
 

src/Core/src/Handlers/Picker/PickerHandler.Standard.cs

@@ -7,6 +7,7 @@ public partial class PickerHandler : ViewHandler<IPicker, object>
 		protected override object CreateNativeView() => throw new NotImplementedException();
 
 		public static void MapTitle(PickerHandler handler, IPicker view) { }
+		public static void MapTitleColor(PickerHandler handler, IPicker view) { }
 		public static void MapSelectedIndex(PickerHandler handler, IPicker view) { }
 		public static void MapCharacterSpacing(PickerHandler handler, IPicker view) { }
 		public static void MapFont(PickerHandler handler, IPicker view) { }

src/Core/src/Handlers/Picker/PickerHandler.Windows.cs

@@ -10,6 +10,9 @@ public partial class PickerHandler : ViewHandler<IPicker, ComboBox>
 		[MissingMapper]
 		public static void MapTitle(PickerHandler handler, IPicker view) { }
 
+		[MissingMapper]
+		public static void MapTitleColor(PickerHandler handler, IPicker view) { }
+
 		[MissingMapper]
 		public static void MapSelectedIndex(PickerHandler handler, IPicker view) { }
 

src/Core/src/Handlers/Picker/PickerHandler.cs

@@ -9,6 +9,7 @@ public partial class PickerHandler
 			[nameof(IPicker.SelectedIndex)] = MapSelectedIndex,
 			[nameof(IPicker.TextColor)] = MapTextColor,
 			[nameof(IPicker.Title)] = MapTitle,
+			[nameof(IPicker.TitleColor)] = MapTitleColor
 		};
 
 		public PickerHandler() : base(PickerMapper)

src/Core/src/Handlers/Picker/PickerHandler.iOS.cs

@@ -97,6 +97,11 @@ public static void MapTitle(PickerHandler handler, IPicker picker)
 			handler.NativeView?.UpdateTitle(picker);
 		}
 
+		public static void MapTitleColor(PickerHandler handler, IPicker picker)
+		{
+			handler.NativeView?.UpdateTitleColor(picker);
+		}
+
 		public static void MapSelectedIndex(PickerHandler handler, IPicker picker)
 		{
 			handler.NativeView?.UpdateSelectedIndex(picker);

src/Core/src/Platform/Android/PickerExtensions.cs

@@ -1,10 +1,38 @@
-namespace Microsoft.Maui
+using Android.Content.Res;
+
+namespace Microsoft.Maui
 {
 	public static class PickerExtensions
 	{
+		static readonly int[][] ColorStates =
+		{
+ 			new[] { Android.Resource.Attribute.StateEnabled },
+ 			new[] { -Android.Resource.Attribute.StateEnabled }
+ 		};
+
 		public static void UpdateTitle(this MauiPicker nativePicker, IPicker picker) =>
 			UpdatePicker(nativePicker, picker);
 
+		public static void UpdateTitleColor(this MauiPicker nativePicker, IPicker picker, ColorStateList? defaultColor)
+		{
+			var titleColor = picker.TitleColor;
+
+			if (titleColor.IsDefault)
+			{
+				nativePicker.SetHintTextColor(defaultColor);
+			}
+			else
+			{
+				var androidColor = titleColor.ToNative();
+
+				if (!nativePicker.TextColors.IsOneColor(ColorStates, androidColor))
+				{
+					var acolor = androidColor.ToArgb();
+					nativePicker.SetHintTextColor(new ColorStateList(ColorStates, new[] { acolor, acolor }));
+				}
+			}
+		}
+
 		public static void UpdateSelectedIndex(this MauiPicker nativePicker, IPicker picker) =>
 			UpdatePicker(nativePicker, picker);
 

src/Core/src/Platform/iOS/PickerExtensions.cs

@@ -1,4 +1,5 @@
 using System;
+using Foundation;
 using Microsoft.Maui.Handlers;
 
 namespace Microsoft.Maui
@@ -8,9 +9,29 @@ public static class PickerExtensions
 		public static void UpdateTitle(this MauiPicker nativePicker, IPicker picker) =>
 			nativePicker.UpdatePicker(picker);
 
+		public static void UpdateTitleColor(this MauiPicker nativePicker, IPicker picker) =>
+ 			nativePicker.SetTitleColor(picker);
+
 		public static void UpdateSelectedIndex(this MauiPicker nativePicker, IPicker picker) =>
 			nativePicker.SetSelectedIndex(picker, picker.SelectedIndex);
 
+		internal static void SetTitleColor(this MauiPicker nativePicker, IPicker picker)
+		{
+			var title = picker.Title;
+
+			if (string.IsNullOrEmpty(title))
+				return;
+
+			var titleColor = picker.TitleColor;
+
+			nativePicker.UpdateAttributedPlaceholder(new NSAttributedString(title, null, titleColor.ToNative()));
+		}
+
+		internal static void UpdateAttributedPlaceholder(this MauiPicker nativePicker, NSAttributedString nsAttributedString)
+		{
+			nativePicker.AttributedPlaceholder = nsAttributedString;
+		}
+
 		internal static void UpdatePicker(this MauiPicker nativePicker, IPicker picker)
 		{
 			var selectedIndex = picker.SelectedIndex;

src/Core/tests/DeviceTests/AssertionExtensions.iOS.cs

@@ -2,7 +2,6 @@
 using System.Threading.Tasks;
 using CoreGraphics;
 using Foundation;
-using Microsoft.Maui.Essentials;
 using UIKit;
 using Xunit;
 using Xunit.Sdk;
@@ -224,5 +223,23 @@ public static void AssertHasUnderline(this NSAttributedString attributedString)
 				throw new XunitException("Label does not have the UnderlineStyle attribute");
 			}
 		}
+
+		public static UIColor GetForegroundColor(this NSAttributedString text)
+		{
+			if (text == null)
+				return UIColor.Clear;
+
+			var value = text.GetAttribute(UIStringAttributeKey.ForegroundColor, 0, out var range);
+
+			if (value == null)
+				return UIColor.Clear;
+
+			Assert.Equal(0, range.Location);
+			Assert.Equal(text.Length, range.Length);
+
+			var kerning = Assert.IsType<UIColor>(value);
+
+			return kerning;
+		}
 	}
 }

src/Core/tests/DeviceTests/Handlers/Picker/PickerHandlerTests.Android.cs

@@ -3,6 +3,7 @@
 using Microsoft.Maui.DeviceTests.Stubs;
 using Microsoft.Maui.Handlers;
 using Xunit;
+using AColor = Android.Graphics.Color;
 
 namespace Microsoft.Maui.DeviceTests
 {
@@ -19,6 +20,18 @@ public async Task TitleInitializesCorrectly()
 			await ValidatePropertyInitValue(picker, () => picker.Title, GetNativeTitle, picker.Title);
 		}
 
+		[Fact(DisplayName = "Title Color Initializes Correctly")]
+		public async Task TitleColorInitializesCorrectly()
+		{
+			var picker = new PickerStub
+			{
+				Title = "Select an Item",
+				TitleColor = Color.CadetBlue
+			};
+
+			await ValidatePropertyInitValue(picker, () => picker.TitleColor, GetNativeTitleColor, picker.TitleColor);
+		}
+
 		[Fact(DisplayName = "CharacterSpacing Initializes Correctly")]
 		public async Task CharacterSpacingInitializesCorrectly()
 		{
@@ -56,7 +69,7 @@ public async Task CharacterSpacingInitializesCorrectly()
 		}
 
 		MauiPicker GetNativePicker(PickerHandler pickerHandler) =>
-			(MauiPicker)pickerHandler.NativeView;
+			pickerHandler.NativeView;
 
 		string GetNativeTitle(PickerHandler pickerHandler) =>
 			GetNativePicker(pickerHandler).Hint;
@@ -84,5 +97,12 @@ bool GetNativeIsBold(PickerHandler pickerHandler) =>
 
 		bool GetNativeIsItalic(PickerHandler pickerHandler) =>
 			GetNativePicker(pickerHandler).Typeface.IsItalic;
+
+		Color GetNativeTitleColor(PickerHandler pickerHandler)
+		{
+			var currentTextColorInt = GetNativePicker(pickerHandler).CurrentTextColor;
+			var currentTextColor = new AColor(currentTextColorInt);
+			return currentTextColor.ToColor();
+		}
 	}
 }

src/Core/tests/DeviceTests/Handlers/Picker/PickerHandlerTests.iOS.cs

@@ -1,4 +1,5 @@
 using System.Threading.Tasks;
+using Microsoft.Maui.DeviceTests.Stubs;
 using Microsoft.Maui.Handlers;
 using UIKit;
 using Xunit;
@@ -7,8 +8,34 @@ namespace Microsoft.Maui.DeviceTests
 {
 	public partial class PickerHandlerTests
 	{
+		[Fact(DisplayName = "Title Color Initializes Correctly")]
+		public async Task TitleColorInitializesCorrectly()
+		{
+			var xplatTitleColor = Color.CadetBlue;
+
+			var picker = new PickerStub
+			{
+				Title = "Select an Item",
+				TitleColor = xplatTitleColor
+			};
+
+			var expectedValue = xplatTitleColor.ToNative();
+
+			var values = await GetValueAsync(picker, (handler) =>
+			{
+				return new
+				{
+					ViewValue = picker.TitleColor,
+					NativeViewValue = GetNativeTitleColor(handler)
+				};
+			});
+
+			Assert.Equal(xplatTitleColor, values.ViewValue);
+			Assert.Equal(expectedValue, values.NativeViewValue);
+		}
+
 		MauiPicker GetNativePicker(PickerHandler pickerHandler) =>
-			(MauiPicker)pickerHandler.NativeView;
+			pickerHandler.NativeView;
 
 		string GetNativeTitle(PickerHandler pickerHandler) =>
 			GetNativePicker(pickerHandler).Text;
@@ -46,5 +73,11 @@ bool GetNativeIsBold(PickerHandler pickerHandler) =>
 
 		bool GetNativeIsItalic(PickerHandler pickerHandler) =>
 			GetNativePicker(pickerHandler).Font.FontDescriptor.SymbolicTraits.HasFlag(UIFontDescriptorSymbolicTraits.Italic);
+
+		UIColor GetNativeTitleColor(PickerHandler pickerHandler)
+		{
+			var mauiPicker = GetNativePicker(pickerHandler);
+			return mauiPicker.AttributedPlaceholder.GetForegroundColor();
+		}
 	}
 }

src/Core/tests/DeviceTests/Stubs/PickerStub.cs

@@ -7,6 +7,8 @@ public partial class PickerStub : StubBase, IPicker
 	{
 		public string Title { get; set; }
 
+		public Color TitleColor { get; set; }
+
 		public IList<string> Items { get; set; } = new List<string>();
 
 		public IList ItemsSource { get; set; }