SplashScreen The SplashScreen class is the default preloader for Mobile Flex applications.
 SplashScreenImage AIR-only Use the SplashScreenImage class to specify different splash screen images based on characteristics of a mobile device.
 SplashScreenImageSource AIR-only Use the SplashScreenImageSource class to specify a Class (typically an embedded image) to be displayed as splash screen at a particular device configuration such as DPI, orientation and resolution.