Slow loading app on android - black screen

Ive developed a game with flash builder 4.5 as an actionscript mobile project (not a flex mobile project). The game runs fine on various devices (samsung galaxy/ htc desire etc) but is very slow to load initially. Loading takes up to 18 seconds during which time a black screen is displayed. Obviously this isnt ideal because it looks like the app has crashed.
So my questions are -
Is this a normal loading time for a pure action script app?
Can this be disguised by a loading or splash screen?
How can i speed up loading or disguise it?
Ive tried embedding the game swf in an as3 container, the container shows a loading screen but only when all assets are loaded so not much use.
Thanks in advance

ive since made a few observations....
1) Install app onto mobile using adb install myapp.apk . Launching initially on android the app takes 18 seconds ish to load. App plays fine. Now kill/ close the app. Relaunch the app. The app now launches in 2 seconds...
2) Relaunch the app several times and it loads in 2 seconds each time.
3) Turn off the mobile device for a few minutes. Switch back on. Launch app, app loads in 2 seconds.
4) Delete/ remove app from mobile device. Reinstall using adb install myapp.apk. Launching takes 18 seconds. Kill the app. Relaunching takes 2 seconds...
Like i say, no answers here but just a few observations...all i can assume from this is that as3 apps are very slow to run on initially, typically 18 seconds, but run fine ever after....??
Why is the app so slow to launch initially? If anyone has any thoughts on any of the above id be very interested to hear them.
Thanks in advance

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