[Android] Fix issue using RefreshView with CollectionView and empty GroupHeader

[jsuarezruiz]

Description of Change

Fix RefreshView issue with CollectionView using a single "zero height" element in GroupHeader.

Issues Resolved

• fixes [Bug] [Android] RefreshView is broken when CollectionView contains single/"zero height" element in GroupHeader #12056

API Changes

None

Platforms Affected

• Android

Behavioral/Visual Changes

None

Before/After Screenshots

Testing Procedure

Launch Core Gallery and navigate to the issue 12056. If can do Pull to Refresh, the test has passed.

PR Checklist

• Targets the correct branch
• Tests are passing (or failures are unrelated)

[bondarenkod]

Excellent job @jsuarezruiz, I've been using this fix in my 'XF issues patched edition' since you published it.

It would be great to have this merged into 5*!
Up!

[Stef-Halmans]

Can this fix be merged? I really need this bug fixed without having to add an item with some height to the header.

[jfversluis]

Now that we're so close to the sunsetting of Xamarin.Forms unfortunately we won't be able to take this in anymore, we're really sorry about that. Nevertheless, thank you so much for your time and effort that you have put into this PR.

Please have a look at the evolution of Xamarin.Forms, .NET MAUI. A lot of development has been going on there. Hopefully this issue was already fixed in that codebase. If not, feel free to port this over to there.

Again, thank you so much for being a contributor and Xamarin.Forms user!