Better way to show splash screen while application loads assets?
AFAIK, android doesn’t have such a mechanism to show default.png.
Unless you write something like LogoScene.cpp for this feature.
I have black screen before LogoScene appears, nearly 2 seconds 
Show a simple LogoScene, then load your huge textures/musics in MenuScene or GameScene.
It won’t take too long to load a fullscreen background in LogoScene init.