ActionScript 3.0 :: Kill App Button For Exporting To Air For Android?

I just started playing around with exporting some of my older Flash projects as android apps.  I have one in particular that is a music player.  It works great but the back button on my android device just backrounds the app.  This is actually what i want since its a music player but would still like to be able to kill the app completely with a button on the stage.  I dont know if anyone has seen the siriusXM app.  When you hit the back button it asks if you want to exit the app (kill it) or just minimize.  I sorta want to do the same thing but simpler by just having a kill app button the stage.  I cant seem to find how to do this.  I created a button called exit_app.  Im assuming I need to make an event listener of some sort and create a function that runs when the button is pushed.  I found this snippet that refers to the back button killing the app.  Id like to modify it to perform the same action when I press my kill app button. 
 
function handleKeys(event:KeyboardEvent):void{if(event.keyCode == Keyboard.BACK)
NativeApplication.nativeApplication.exit();