Cannot find a child SupportMapFragment from an AndroidX Fragment

I think this is a known issue on the Google side, but I’m not sure if it has been sorted yet or is going to propagate to Xamarin soon:

Stack overflow issue

I have a SupportMapFragment, which inherits Support.V4.App.Fragment. Before I migrated to AndroidX I had this line:

_mapFragment = (SupportMapFragment)ChildFragmentManager.FindFragmentById(Resource.Id.map);

Now I get a casting error because the AndroidX fragment’s child fragment manager doesn’t return a support fragment.

[Redth]

What if you use:

_mapFragment = ChildFragmentManager.FindFragmentById(Resource.Id.mapZone).JavaCast<SupportMapFragment>();

[ToddThomson]

@Ryan-Palmer Thank-you for all your help! Sorry for the confusion - I had previously used an xml layout with a SupportMapFragment with the V4 support libs. I have now gone back to that code. Given your help with the JavaCast<SupportMapFragment>() the nested fragment is now working fine.

I am not sure when or why I changed my code, but having an xml layout for a UI fragment seems correct even if it is only has a SupportMapFragment based fragment contained within it.

Thanks again Ryan!