Copy-Paste Context Menu Not Displaying on Long Press for Entry Added to Window at Runtime on Android in .NET MAUI

Question

When long-pressing an Entry on Android, the copy/paste context menu should appear by default. It works when the Entry is placed directly on the page. However, if the Entry is added to the window on a button click, the copy/paste context menu does not display, and the native Entry's ContextMenuCreated event is not triggered.

Sample Link

<VerticalStackLayout>
    <Button  Text="Add entry to window" Clicked="OpenInWindow" HorizontalOptions="Fill" />
</VerticalStackLayout>

        private void OpenInWindow(object sender, EventArgs e)
        {
            Grid grid = new Grid();
            grid.BackgroundColor = Colors.LightGray;
            grid.HeightRequest = 100;
            grid.Padding = 100;
            Entry entry = new Entry() { BackgroundColor = Colors.Yellow, Text = "Entry", HeightRequest = 100 };
            grid.Children.Add(entry);
            entry.Loaded += Entry_Loaded;

#if ANDROID
            
            IWindowManager windowManager = WindowOverlayHelper.GetPlatformWindow()!.WindowManager!;
            this.GetWindowManagerLayoutParams();

            if (windowManager != null && WindowManagerLayoutParams != null)
            {

                IMauiContext? context = grid.Handler?.MauiContext ?? WindowOverlayHelper.window?.Handler?.MauiContext;
                PlatformView childView = grid.ToPlatform(context);
                windowManager!.AddView(childView, WindowManagerLayoutParams);
            }
#endif
        }

        private void Entry_Loaded(object? sender, EventArgs e)
        {
#if ANDROID
            ((sender as Entry).Handler.PlatformView as AndroidX.AppCompat.Widget.AppCompatEditText).ContextMenuCreated += MainPage_ContextMenuCreated;
#endif
        }

#if ANDROID
        private void MainPage_ContextMenuCreated(object? sender, PlatformView.CreateContextMenuEventArgs e)
        {
            System.Diagnostics.Debug.WriteLine("Context menu shown");
        }

        public WindowManagerLayoutParams? WindowManagerLayoutParams;

        internal WindowManagerLayoutParams GetWindowManagerLayoutParams()
        {
            if (this.WindowManagerLayoutParams == null)
            {
                this.WindowManagerLayoutParams = new WindowManagerLayoutParams();
                var decorViewContent = WindowOverlayHelper.decorViewContent;
                if (decorViewContent != null)
                {
                    this.WindowManagerLayoutParams.Width = decorViewContent.Width;
                    this.WindowManagerLayoutParams.Height = decorViewContent.Height;
                }
                this.WindowManagerLayoutParams.Format = Format.Translucent;
            }

            return this.WindowManagerLayoutParams;
        }
#endif

    public class WindowOverlayHelper
        {
            #region Fields

            /// <summary>
            /// Gets the application window.
            /// </summary>
            internal static IWindow? window => GetActiveWindow();


#if ANDROID
            public static PlatformView? decorViewContent => GetPlatformWindow()?.DecorView;
#endif
            #endregion

            #region Private methods

            /// <summary>
            /// Helps to get the current active window.
            /// </summary>
            /// <returns> Current active window.</returns>
            private static IWindow? GetActiveWindow()
            {
                var windowCollection = (IPlatformApplication.Current?.Application as Microsoft.Maui.Controls.Application)?.Windows;
                if (windowCollection != null)
                {
                    foreach (var window in windowCollection)
                    {
                        if (window != null)
                        {
                            var propertyInfo = window.GetType().GetProperty("IsActivated", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
                            if (propertyInfo != null)
                            {
                                var isActivated = (bool)(propertyInfo?.GetValue(window))!;
                                if (isActivated)
                                {
                                    return window;
                                }
                            }
                        }
                    }
                }

                return (IPlatformApplication.Current?.Application as Microsoft.Maui.Controls.Application)?.MainPage?.Window;
            }

            

#if ANDROID

            /// <summary>
            /// Gets the activity window for Android.
            /// </summary>
            /// <returns>Returns the window of the platform view.</returns>
            public static Window? GetPlatformWindow()
            {
                if (window != null && window.Handler is WindowHandler windowHandler && windowHandler.PlatformView is Activity platformActivity)
                {
                    if (platformActivity == null || platformActivity.WindowManager == null
                        || platformActivity.WindowManager.DefaultDisplay == null)
                    {
                        return null;
                    }

                    return platformActivity.Window;
                }

                return null;
            }

           
#endif
            #endregion
        }
    

I checked if the context menu is created by verifying whether the ContextMenuCreated event is triggered using:

((Entry.Handler.PlatformView as AndroidX.AppCompat.Widget.AppCompatEditText).ContextMenuCreated += MainPage_ContextMenuCreated;

However, the event is not being triggered.

I verified that both the LongClick and Touch events are triggered for the Entry's native view.

Checked with .net maui Entry and Editor issue occurs in both.

Answer 1

I cloned your project and reproduced your problem. And then I find the simialr issue in the native android:Android default cut/copy/paste not showing in EditText.

So I created a native android project with the Android Studio and added the EditText with the windowManager.AddView(). The same problem appeared.

After that, I found the issue in the Android Help Community: Copy-Paste option not appering on long press on Edit Text inside popup windows.

So this is an issue in the native android not the .net maui. You can report this in the Android Help Community. And for a workaround, you can try to add your own copy paste option to the entry or just give up the windowManager.AddView().