[Android] SearchHandler - added focus/unfocus support

src/Controls/src/Core/Compatibility/Handlers/Shell/Android/SearchHandlerAppearanceTracker.cs

@@ -32,6 +32,7 @@ public SearchHandlerAppearanceTracker(IShellSearchView searchView, IShellContext
 			_control = searchView.View;
 			_searchHandler.PropertyChanged += SearchHandlerPropertyChanged;
 			_editText = (_control as ViewGroup).GetChildrenOfType<EditText>().FirstOrDefault();
+			_editText.FocusChange += EditTextFocusChange;
 			UpdateSearchBarColors();
 			UpdateFont();
 			UpdateHorizontalTextAlignment();
@@ -83,6 +84,11 @@ protected virtual void SearchHandlerPropertyChanged(object sender, System.Compon
 			}
 		}
 
+		void EditTextFocusChange(object s, AView.FocusChangeEventArgs args)
+		{
+			_searchHandler.SetIsFocused(_editText.IsFocused);
+		}
+
 		void UpdateSearchBarColors()
 		{
 			UpdateBackgroundColor();
@@ -221,6 +227,7 @@ protected virtual void Dispose(bool disposing)
 				if (_searchHandler != null)
 				{
 					_searchHandler.PropertyChanged -= SearchHandlerPropertyChanged;
+					_editText.FocusChange -= EditTextFocusChange;
 				}
 				_searchHandler = null;
 				_control = null;

src/Controls/tests/TestCases.HostApp/Issues/Issue24670.cs

@@ -0,0 +1,27 @@
+namespace Maui.Controls.Sample.Issues
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	[Issue(IssueTracker.ManualTest, "24670", "SearchHandler.Focused event never fires", PlatformAffected.All)]
+	public partial class Issue24670 : Shell
+	{
+		public Issue24670()
+		{
+			InitializeComponent();
+		}
+
+		private void SearchHandler_Focused(object sender, EventArgs e)
+		{
+			focusedLabel.Text = "Focused: True";
+		}
+
+		private void SearchHandler_Unfocused(object sender, EventArgs e)
+		{
+			unfocusedLabel.Text = "Unfocused: True";
+		}
+
+		private void Button_Clicked(object sender, EventArgs e)
+		{
+			searchHandler.SetIsFocused(!searchHandler.IsFocused);
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue24670.xaml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Shell xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+       x:Class="Maui.Controls.Sample.Issues.Issue24670">
+    <ShellContent
+        Title="Home"
+        Route="MainPage">
+        <ContentPage>
+            <Shell.SearchHandler>
+                <SearchHandler
+                    SearchBoxVisibility="Expanded"
+                    Focused="SearchHandler_Focused"
+                    Unfocused="SearchHandler_Unfocused"
+                    Placeholder="Click to focus.."/>
+            </Shell.SearchHandler>
+
+            <StackLayout>
+                <Button AutomationId="button"
+                        Clicked="Button_Clicked"
+                        Text="Click to focus/unfocus search handler"/>
+                <Label x:Name="focusedLabel"
+                       AutomationId="focusedLabel"
+                       Text="Focused: False"/>
+                <Label x:Name="unfocusedLabel"
+                       AutomationId="unfocusedLabel"
+                       Text="Unfocused: False"/>
+            </StackLayout>
+        </ContentPage>
+    </ShellContent>
+</Shell>

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue24670.cs

@@ -0,0 +1,30 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue24670 : _IssuesUITest
+	{
+		public override string Issue => "SearchHandler.Focused event never fires";
+
+		public Issue24670(TestDevice testDevice) : base(testDevice)
+		{
+		}
+
+		[Test]
+		[Category(UITestCategories.Shell)]
+		[Category(UITestCategories.SearchBar)]
+		public void SearchHandlerFocusAndUnfocusEventsShouldWork()
+		{
+			App.Click("button");
+			App.Click("button");
+
+			var focusedLabelText = App.WaitForElement("focusedLabel").GetText();
+			var unfocusedLabelText = App.WaitForElement("unfocusedLabel").GetText();
+
+			Assert.That(focusedLabelText, Is.EqualTo("Focused: True"));
+			Assert.That(unfocusedLabelText, Is.EqualTo("Unfocused: True"));
+		}
+	}
+}