On 12 September 2015 at 16:03, Krzysztof Tataradziński <[email protected]> wrote:
> > So if I good understand, that Gmail is asking Ubuntu OS and sending some > data to Google and get some other back, even when primary app is closed? > Yes? > So, the gmail, facebook, and twitter notifications are notionally separate from the pre-installed web apps at the moment. The account-polld process just checks for relevant accounts registered on the system, and then periodically calls those services' APIs and then injects notifications locally. As I said before, account-polld is not extensible by apps. So they are encouraged to instead use the push notifcation service. With this, your app would contact a server you're running and ask for notifications to be sent. When there are notifications for the user, your server would then make the appropriate requests to Canonical's push notification server. That server would then contact the user's phone, which will in turn call your app's push notification helper. At that point you can inject a notification message, or whatever else. > I'm thinking about Activity Tracker - is there a possibility to do similar > thing with GPS data? I mean that app will ask Ubuntu OS for location, even > when screen is off (and app is not in foreground) - is that possible for > now or does Canonical working on it? > The push notification API isn't going to help with GPS, since you want to be woken based on a local event rather than something coming over the network. I don't think such an API is available for location yet. I rememeber seeing some talk about the possibility of a "geofence" style API (where a helper could be invoked if the user moves more than a certain distance), but I don't know if it has gotten beyond the idea stage. James.
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