The mapView is treated as Nullable throughout MapMeAdapter but when attaching, only a NonNull View is accepted. Even as SupportMapFragment is inflated in a parent's onCreateView, upon configuration changes onMapReady might be called before onCreateView of the parent so if the attaching is done in onMapReady the only possible valid View to pass is the one fetched by requireView() but that View has yet not been created and an IllegalException will be thrown.
Instead if getView() that is Nullable would be allowed, things would work out.
The
mapViewis treated asNullablethroughoutMapMeAdapterbut when attaching, only aNonNull Viewis accepted. Even asSupportMapFragmentis inflated in a parent'sonCreateView, upon configuration changesonMapReadymight be called beforeonCreateViewof the parent so if the attaching is done inonMapReadythe only possible validViewto pass is the one fetched byrequireView()but thatViewhas yet not been created and anIllegalExceptionwill be thrown.Instead if
getView()that isNullablewould be allowed, things would work out.