[Android] Fix for the FontImageSource color is not applied properly to the Bottom Tab Icon

src/Controls/src/Core/Platform/Android/TabbedPageManager.cs

@@ -438,6 +438,7 @@ void OnPagePropertyChanged(object sender, PropertyChangedEventArgs e)
 						{
 							menuItem.SetIcon(result.Value);
 						});
+					SetupBottomNavigationViewIconColor(page, menuItem, index);
 				}
 				else
 				{
@@ -652,8 +653,13 @@ int GetItemTextColor(Color customColor, ColorStateList originalColors)
 			return customColor?.ToPlatform().ToArgb() ?? originalColors?.DefaultColor ?? 0;
 		}
 
-		protected virtual ColorStateList GetItemIconTintColorState()
+		protected virtual ColorStateList GetItemIconTintColorState(Page page)
 		{
+			if (page.IconImageSource is FontImageSource fontImageSource && fontImageSource.Color is not null)
+			{
+				return null;
+			}
+
 			if (_orignalTabIconColors is null)
 			{
 				_orignalTabIconColors = IsBottomTabPlacement ? _bottomNavigationView.ItemIconTintList : _tabLayout.TabIconTint;
@@ -773,7 +779,14 @@ void UpdateItemIconColor()
 			_newTabIconColors = null;
 
 			if (IsBottomTabPlacement)
-				_bottomNavigationView.ItemIconTintList = GetItemIconTintColorState() ?? _orignalTabIconColors;
+			{
+				for (int i = 0; i < _bottomNavigationView.Menu.Size(); i++)
+				{
+					var menuItem = _bottomNavigationView.Menu.GetItem(i);
+					var page = Element.Children[i];
+					SetupBottomNavigationViewIconColor(page, menuItem, i);
+				}
+			}
 			else
 			{
 				for (int i = 0; i < _tabLayout.TabCount; i++)
@@ -785,6 +798,28 @@ void UpdateItemIconColor()
 			}
 		}
 
+		void SetupBottomNavigationViewIconColor(Page page, IMenuItem menuItem, int i)
+		{
+			// Updating the icon color of each BottomNavigationView item individually works correctly.
+			// This is necessary because `ItemIconTintList` applies the color globally to all items,
+			// which doesn't allow for per-item customization.
+			// Currently, there is no modern API that provides the desired behavior.
+			// Therefore, the obsolete `BottomNavigationItemView` approach is used.
+#pragma warning disable XAOBS001 // Type or member is obsolete
+			if (_bottomNavigationView.GetChildAt(0) is BottomNavigationMenuView menuView)
+			{
+				var itemView = menuView.GetChildAt(i) as BottomNavigationItemView;
+
+				if (itemView != null && itemView.Id == menuItem.ItemId)
+				{
+					ColorStateList colors = GetItemIconTintColorState(page);
+
+					itemView.SetIconTintList(colors);
+				}
+			}
+#pragma warning restore XAOBS001 // Type or member is obsolete
+		}
+
 		internal void UpdateTabItemStyle()
 		{
 			Color barItemColor = BarItemColor;
@@ -830,7 +865,7 @@ void SetIconColorFilter(Page page, TabLayout.Tab tab, bool selected)
 			if (icon == null)
 				return;
 
-			ColorStateList colors = (page.IconImageSource is FontImageSource fontImageSource && fontImageSource.Color is not null) ? null : GetItemIconTintColorState();
+			ColorStateList colors = GetItemIconTintColorState(page);
 			if (colors == null)
 				ADrawableCompat.SetTintList(icon, null);
 			else

src/Controls/tests/TestCases.HostApp/Issues/Issue29109.cs

@@ -0,0 +1,122 @@
+using Microsoft.Maui.Controls.PlatformConfiguration.AndroidSpecific;
+using Button = Microsoft.Maui.Controls.Button;
+
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 29109, "[Android] Unable to set unselected iconImageSource color when toolbar placement is set to bottom", PlatformAffected.Android)]
+public class Issue29109 : TestTabbedPage
+{
+	protected override void Init()
+	{
+		// Set the toolbar placement to bottom (android specific)
+		On<Microsoft.Maui.Controls.PlatformConfiguration.Android>().SetToolbarPlacement(Microsoft.Maui.Controls.PlatformConfiguration.AndroidSpecific.ToolbarPlacement.Bottom);
+		// Set tab colors
+		this.SelectedTabColor = Colors.Red;
+		this.UnselectedTabColor = Colors.Gray;
+
+		// Add tabs
+		this.Children.Add(new Issue29109Tab1());
+		this.Children.Add(new Issue29109Tab2());
+		this.Children.Add(new Issue29109Tab3());
+	}
+}
+
+public class Issue29109Tab1 : ContentPage
+{
+	public Issue29109Tab1()
+	{
+		//If no FontImageSource color is given, tab icon should be applied based on the SelectedTabColor and UnselectedTabColor.
+		IconImageSource = new FontImageSource
+		{
+			FontFamily = "Ion",
+			Glyph = "\uf47e",
+			Size = 15
+		};
+		Button button = new Button
+		{
+			Text = "Change Tab Icon Color",
+			BackgroundColor = Colors.Green,
+			TextColor = Colors.White
+		};
+		button.AutomationId = "Button";
+		button.Clicked += (s, e) =>
+		{
+			//If the FontImageSource color is given, the tab icon color should be applied solely based on the specified color, regardless of the SelectedTabColor or UnselectedTabColor.
+			(this.IconImageSource as FontImageSource).Color = Colors.Orange;
+		};
+		Title = "Tab 1";
+		var verticalStackLayout = new VerticalStackLayout
+		{
+			VerticalOptions = LayoutOptions.Center,
+			Children = {
+					new Label
+						{
+							HorizontalOptions = LayoutOptions.Center,
+							Text = "Tab 1"
+						},
+						button
+					}
+
+		};
+		Content = verticalStackLayout;
+	}
+}
+
+public class Issue29109Tab2 : ContentPage
+{
+	public Issue29109Tab2()
+	{
+		//The FontImageSource color is given. So, the tab icon color should be applied based solely on the given color, regardless of the selected tab or unselected tab color.
+		IconImageSource = new FontImageSource
+		{
+			FontFamily = "Ion",
+			Glyph = "\uf47e",
+			Color = Colors.DodgerBlue,
+			Size = 15
+		};
+
+		Title = "Tab 2";
+		var verticalStackLayout = new VerticalStackLayout
+		{
+			VerticalOptions = LayoutOptions.Center,
+			Children =
+					{
+						new Label
+							{
+								HorizontalOptions = LayoutOptions.Center,
+								Text = "Tab 2"
+							},
+					}
+		};
+		Content = verticalStackLayout;
+	}
+}
+public class Issue29109Tab3 : ContentPage
+{
+	public Issue29109Tab3()
+	{
+		//The FontImageSource color is given. So, the icon color should be applied based solely on the given color, regardless of the selected tab or unselected tab color.
+		IconImageSource = new FontImageSource
+		{
+			FontFamily = "Ion",
+			Glyph = "\uf47e",
+			Color = Colors.Green,
+			Size = 15
+		};
+
+		Title = "Tab 3";
+		var verticalStackLayout = new VerticalStackLayout
+		{
+			VerticalOptions = LayoutOptions.Center,
+			Children =
+					{
+						new Label
+							{
+								HorizontalOptions = LayoutOptions.Center,
+								Text = "Tab 3"
+							},
+					}
+		};
+		Content = verticalStackLayout;
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue29109.cs

@@ -0,0 +1,33 @@
+#if ANDROID
+//Since bottom tab placement is specific to Android, I enabled it only for Android: https://learn.microsoft.com/en-us/dotnet/maui/android/platform-specifics/tabbedpage-toolbar-placement?view=net-maui-9.0
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue29109 : _IssuesUITest
+	{
+		public Issue29109(TestDevice device) : base(device) { }
+
+		public override string Issue => "[Android] Unable to set unselected iconImageSource color when toolbar placement is set to bottom";
+
+		[Test, Order(1)]
+		[Category(UITestCategories.TabbedPage)]
+		public void FontImageSourceColorShouldApplyOnBottomTabIconOnAndroid()
+		{
+			App.WaitForElement("Button");
+			VerifyScreenshot();
+		}
+
+		[Test, Order(2)]
+		[Category(UITestCategories.TabbedPage)]
+		public void DynamicFontImageSourceColorShouldApplyOnBottomTabIconOnAndroid()
+		{
+			App.WaitForElement("Button");
+			App.Tap("Button");
+			VerifyScreenshot();
+		}
+	}
+}
+#endif