SupportMapFragment and OnMapReadyCallback

[kjkrum]

SupportMapFragment only retains a reference to a single OnMapReadyCallback, which it passes to its MapView in onStart(). It does not test this reference for null. Nor does it clear this reference, so the callback will be called again every time onStart() runs. Compare this to the behavior of MapView, which retains a collection of callbacks and removes them as they are called.

Is there a reason SupportMapFragment#getMapAsync(...) doesn't simply call through to MapView#getMapAsync(...)?

[kjkrum]

Forwarding the fragment's getMapAsync(...) directly to MapView#getMapAsync(...) seems to work fine. The only problem is that Fragment#onCreate(...) is called before Fragment#onCreateView(...), so the fragment still has to store and forward callbacks before onCreateView(...).