Keyboard overlaps WebView in MAUI

[paulguz-datapa]

Description

I've created this bug to essentially reopen #14197, as it appears it was closed without actually being fixed.

In the comments of the above bug, a user posted a workaround, which seems to work for most. It does not work for me - it actually seems to break the sizing of the WebView so that it expands beyond the boundaries of the screen.

Regardless of the above workaround, the bug was added to the MAUI SDK Ongoing queue, but then removed as it appears a bot mistook the workaround for an actual fix, and closed the issue.

I can confirm the issue remains in .Net 9.

As the workaround does not work for me, please reconsider fixing this properly.

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

9.0.50 SR5

Is this a regression from previous behavior?

No, this is something new, Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[similar-issues-ai]

We've found some similar issues:

• MAUI Blazor 9 has broken keyboard overlap on Android #27314 , similarity score: 85%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

Note: You can give me feedback by 👍 or 👎 this comment.

[Yu-Core]

The method I am currently using (.NET 9)
It can work, but there may be issues

using Android.Widget;
using static Android.Resource;
using Activity = Android.App.Activity;
using Rect = Android.Graphics.Rect;
using View = Android.Views.View;
using Android.App;
using AndroidX.Core.View;

namespace MauiBlazor
{
#nullable disable
    public class SoftKeyboardAdjustResize
    {
        Activity _activity;
        bool _edgeToEdge;
        FrameLayout.LayoutParams frameLayoutParams;
        int usableHeightPrevious = 0;
        Rect rect = new();
        View mChildOfContent;

        public SoftKeyboardAdjustResize(Activity activity, bool edgeToEdge = true)
        {
            _activity = activity;
            _edgeToEdge = edgeToEdge;
            mChildOfContent = _activity.FindViewById<FrameLayout>(Id.Content).GetChildAt(0);
            mChildOfContent.ViewTreeObserver.GlobalLayout += (s, e) => PossiblyResizeChildOfContent();
            frameLayoutParams = (FrameLayout.LayoutParams)mChildOfContent?.LayoutParameters;
            SetBackgroundColor(Android.Graphics.Color.White);
        }

        public void OnStop()
        {
            mChildOfContent.RequestLayout();
        }

        void PossiblyResizeChildOfContent()
        {
            _activity.FindViewById<FrameLayout>(Id.Content).GetWindowVisibleDisplayFrame(rect);
            var usableHeightNow = rect.Height();
            if (usableHeightNow != usableHeightPrevious)
            {
                int usableHeightSansKeyboard = mChildOfContent.RootView.Height;
                int heightDifference = usableHeightSansKeyboard - usableHeightNow;
                if (_edgeToEdge)
                {
                    frameLayoutParams.Height = usableHeightNow + _activity.GetStatusBarInsets().Top + _activity.GetNavigationBarInsets().Bottom;
                    if (heightDifference > usableHeightSansKeyboard / 4)
                    {
                        //Resolve anomalies during screen rotation
                        mChildOfContent.RootView.Top = -_activity.GetStatusBarInsets().Top;
                        mChildOfContent.Layout(rect.Left, rect.Top, rect.Right, rect.Bottom);
                    }
                }
                else
                {
                    frameLayoutParams.Height = usableHeightNow;
                }

                mChildOfContent.RequestLayout();
                usableHeightPrevious = usableHeightNow;
            }
        }

        void SetBackgroundColor(Android.Graphics.Color color)
        {
            mChildOfContent.RootView.SetBackgroundColor(color);
        }
    }

    public static class ActivityExtensions
    {
        private static readonly AndroidX.Core.Graphics.Insets emptyInsets = AndroidX.Core.Graphics.Insets.Of(0, 0, 0, 0);

        public static AndroidX.Core.Graphics.Insets GetStatusBarInsets(this Activity activity)
        {
            Android.Views.View decorView = activity.FindViewById(Id.Content);
            WindowInsetsCompat windowInsets = ViewCompat.GetRootWindowInsets(decorView);
            if (windowInsets is null)
            {
                return emptyInsets;
            }

            return windowInsets.GetInsets(WindowInsetsCompat.Type.StatusBars());
        }

        public static AndroidX.Core.Graphics.Insets GetNavigationBarInsets(this Activity activity)
        {
            Android.Views.View decorView = activity.FindViewById(Id.Content);
            WindowInsetsCompat windowInsets = ViewCompat.GetRootWindowInsets(decorView);
            if (windowInsets is null)
            {
                return emptyInsets;
            }

            return windowInsets.GetInsets(WindowInsetsCompat.Type.NavigationBars());
        }
    }
}

Platforms/Android/MainActivity.cs

private SoftKeyboardAdjustResize softKeyboardAdjustResize;

protected override void OnCreate(Bundle savedInstanceState)
{
    base.OnCreate(savedInstanceState);
    softKeyboardAdjustResize = new SoftKeyboardAdjustResize(this);
}

protected override void OnStop()
{
    base.OnStop();

    softKeyboardAdjustResize.OnStop();
}

If you not use EdgeToEdge

softKeyboardAdjustResize = new SoftKeyboardAdjustResize(this,false);