黑色屏幕之前的Android Splash Screen

I would like to display a splash screen while everything is initializing in the onCreate() method, yet components that I need to draw things to the screen are also initializing, therefore there's a black screen when I start the app and after the onCreate() method has completed then only is the first screen drawn. Instead of having the black screen I'd like a splash screen.I would like to display a splash screen while e