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It's really necessary to keep GPS up and running while in Standyby-Mode and send Positions to the App. GPS takes to long to resync after powerup (maybe several minutes). And also it is impossible to log a GPX-Track or calculate the distance of the trip.
Short answer: it's possible, but not directly accessible yet in the NDK APIs. AIR can do it, so it's technically feasible but possibly impractical until they expose it in the NDK.
Maybe it is also fixed with the update for the NDK? I will do a test later.
What are the plans from RIM? Do you want to support it? What will I have to change in my App?
What update is that? I hadn't heard of a recent one. As far as I know, there's never been support yet for background GPS in the NDK, so it's unlikely it's fixed (i.e. added) unless something just came out in the last week or so.
RIM hasn't announced any plans for this yet, but it seems a safe bet that a future version of the NDK will have some API changes to support this. Maybe what we see them release at BB10 Jam next week?
So it doesn't really make sense to support the Playbook until BB10 will be available. So maybe never.
Good to have other systems available for Qt. I will concentrate on Android now and support the development there. Maybe I'll by a Galaxy S3 and have a look at it.
