12:40 p.m.
Matthia,
Thanks for this. Are you referring to content-available flag or the
setContentAvailable function?
We already send silent notifications out to our Android and Apple
devices and the devices handle these correctly.
Our logic goes that we send a silent notification to the device via UPS,
the device then connects to the server and pulls some data from the
server. If our app is in the foreground, we set a tiny alert in the top
left of the screen telling the user that something is ready for them, if
our app is in the background we set a notification up in the drawer
using a local-notification plugin, if the app is not started then the
fact the app has not pulled data from the server acts as a flag and we
then send down full notifications to the device. The local-notifications
and the ‘full fat’ notifications all work the same way when the user
clicks on them.
We have all of this is working now without setContentAvailable. Its much
as you outlined below. I have two phones on my desk as we speak, an
Apple and an Android and we are comparing how the notifications look as
we ping different data down to them in different situations. We’re
down to design looks now rather than programming :)
We’re just trying to work out how setContentAvailable fits into all of
this, because we aren’t using it at all! Should we be?
Rob
On 3 Dec 2015, at 18:23, Matthias Wessendorf wrote:
Hi,
it's an iOS feature, that you can use for having the app download
something
(or check state on your backend), before the alert is being made
visible to
the end-user:
https://developer.xamarin.com/guides/ios/application_fundamentals/backgro...
Also (more interesting, I think) you can use it to send a slient
message to
the device. E.g. when the app runs (fore/background) the callback is
invoked. You can use that to check state on your own backend (a 30
second
time window, you have for this), and if needed you could use that to,
for
instance, issue something local e.g. local notifications (those are
better
and more handy for several reasons e.g. better control of the badge
icon):
https://developer.xamarin.com/guides/ios/application_fundamentals/backgro...
HTH,
Matthias
On Thu, Dec 3, 2015 at 7:01 PM, Rob Willett
<rob.aerogear(a)robertwillett.com>
wrote:
> Hi,
>
> We now seem to have something approaching a stable and working UPS
> configuration. (Famous last words!) Thanks to the Aerogear team for
> helping
> resolve the background notifications on Android.
>
> As we are tidying up, we noticed (ahem) that we had commented out a
> few
> lines in our code.
>
> if (event['content-available'])
> {
> // Still not clear what to do with this.
> // push.setContentAvailable(1);
> }
>
> We went back to the Aerogear docs and tried to work out what
> setContentAvailable really does and what should we do with it. The
> docs for
> the function call are a little sparse, so we looked at the source
> code and
> we’re still no wiser.
>
> Is there a better explanation of when we should call
> setContentAvailable
> and with which parameter?
>
> Just to set the ball rolling we *think* it could mean that when you
> receive the content-available = 1 flag on iOS, we do a call to get
> some
> data from the server ourselves, if the the results of *our* server
> call
> indicate that we have received new data, we set the value to
> setContentAvailable to 1, if our function call to the server has no
> data,
> then we set it to zero and if something failed we set it to 2.
>
> So what happens if the value is 0, 1 or 2? if its 2, is a new new
> call
> made to something, if its 0 or 1 what happens?
>
> Apologies if we’ve missed the point of it, but we’re struggling
> to
> understand this.
>
> Thanks,
>
> Rob.
>
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>
>
--
Matthias Wessendorf
blog: http://matthiaswessendorf.wordpress.com/
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