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I noticed that creation of a MapView object takes a long time. It is about one sec, so if I have a mapview in my layout I always see black screen during setContentView execution (if mapview is defined in xml layout). I tried also to create this MapView manually but still MapView constructor is a slow one.
Is it possible to show some other window during map initialization to omit this black screen?
Display a message/Image/whatever you want in your layout at the mapView location and use another thread to construct the mapView.
By the way, do you insert overlays to your mapView at startup ? If it is the case, try to delay them.
Other idea : if your application do not show the map at startup, load the mapview in the background.