Fixed picker allows user input if the keyboard is visible (#26382)

* Fixed The picker allows you to write text if the keyboard is visible

* Modified test case and image

Some times the text is entered in entry instead of picker

* Fixed test case failure with diff approach

* updated code changes

* modified code changes

* Fixed The picker allows you to write text if the keyboard is visible

* Modified test case and image

Some times the text is entered in entry instead of picker

* Fixed test case failure with diff approach

* updated code changes

* modified code changes

Author: NirmalKumarYuvaraj

src/Controls/tests/TestCases.Android.Tests/snapshots/android/PickerShouldNotAllowUserInputThroughKeyboard.png

@@ -0,0 +1,29 @@
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 24930, "The picker allows you to write text if the keyboard is visible", PlatformAffected.Android)]
+	public partial class Issue24930 : ContentPage
+	{
+		const string FirstPickerItem = "Baboon";
+		const string PickerId = "picker";
+		public Issue24930()
+		{
+			Picker picker = new Picker
+			{
+				AutomationId = PickerId,
+				Title = "Select a monkey"
+			};
+
+
+			picker.ItemsSource = new List<string>
+			{
+				FirstPickerItem,
+				"Capuchin Monkey"
+			};
+
+			Content = new StackLayout()
+			{
+				Children = { picker }
+			};
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue24930.cs

@@ -0,0 +1,40 @@
+#if ANDROID // This test is only for Android, Since the edit text is base view for Picker in Android
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue24930 : _IssuesUITest
+	{
+		const string FirstPickerItem = "Baboon";
+		const string PickerId = "picker";
+
+		public Issue24930(TestDevice device) : base(device) { }
+
+		public override string Issue => "The picker allows you to write text if the keyboard is visible";
+
+		// Key codes for "abcd"
+		int[] keyCodes = new int[]
+		{
+			29,30,31,32
+		};
+
+		[Test]
+		[Category(UITestCategories.Picker)]
+		public void PickerShouldNotAllowUserInputThroughKeyboard()
+		{
+			App.WaitForElement(PickerId);
+			App.Tap(PickerId);
+			App.WaitForElement(FirstPickerItem);
+			App.Back();
+			foreach (var keyCode in keyCodes)
+			{
+				App.SendKeys(keyCode);
+			}
+
+			VerifyScreenshot();
+		}
+
+	}
+}
+#endif

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue24930.cs

@@ -40,12 +40,12 @@ public static void OnFocusChanged(bool gainFocus, EditText sender)
 
 		static void OnKeyPress(object? sender, AView.KeyEventArgs e)
 		{
+			//To prevent user from entering text when focus is received
+			e.Handled = true;
 			if (!AvailableKeys.Contains(e.KeyCode))
 			{
-				e.Handled = false;
 				return;
 			}
-			e.Handled = true;
 			(sender as AView)?.CallOnClick();
 		}