When you first start your application by clicking on its icon or via another process, the previously active application moves to the background. Your application launches and comes to the foreground to occupy the home screen. Navigating between native applications or between a native application and an AIR-developed application is identical.
Android does not currently provide the option of a startup screen. You may experience a black screen while the application is setting up. Test your application and rework your initialization process if setup takes too long. As a workaround, make your root application a simple movie with a loading indicator graphic. Once it is loaded and
rendered (listen for the ADDED_TO_STAGE event), load your main application in it using the Loader class. The main application .swf file must be in the list of Included Files so that it lives in the application directory.
By default, your application occupies the screen underneath the 38-pixel-tall status bar that displays information such as network signal, battery life, time, and notifications. If you wish to hide this bar and go full screen, in Flash Professional select Full Screen under File→AIR Android settings→General. In Flash Builder, add the following node as a child of the <initialWindow> node in the application descriptor:
<fullScreen>true</fullScreen>