How to create Flash screen in AIR for android app ?

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http://stackoverflow.com – I am developing one application in AIR for android, when the app stars it shows blank screen for few seconds (10 sec ), instead if that have to show flash screen to the user when background process is going on. Searched a lot for creating flash screen in AIR did't get any proper solution for that. i know how to make it in android, but not able to solve in AIR using android extension also. (HowTos)