Thanks for the replies. I should clarify some of the points you both
mentioned. This server is not in my control at all, so any kind of push
would be out of the question I suppose. I only want to pull in short
increments if the user is actively using the Activity in question, not if
the phone is locked, or they're in another app, or even in my app but in
another Activity.
I know I could refresh the init method I have which kicks off the thread to
pull new data but given the ProgressDialog it shows, I think it would be
annoying to see that so frequently when the user isn't actively requesting
it. If I use the small loading icon, I suspect since the UI and data pull
are running on different threads it wouldn't lock up the UI on the end user
but I'll need to test that for performance/responsiveness. Maybe I'll give
that a shot and see how it goes.
Long term, I would like to do this in longer intervals (30+ minutes) when
the user is not actively in the app or on this Activity and toss up a
notification if something interesting happens with the new data. While also
retaining the 5-10 second interval when they are actively looking at this
Activity. Long term... :)
--
Chris Stewart
http://chriswstewart.com
On Fri, Mar 4, 2011 at 4:22 AM, Kostya Vasilyev kmans...@gmail.com wrote:
It just depends on what kind of server you're dealing with.
If it's your own, you could implement a simple push scheme by keeping the
TCP/IP connection open after the initial data download, and having the
server send new data over this connection. The client would just check every
few seconds if the socket has readable data, and if so, read it and update
the UI. A variation of this would use two connections, one for
notifications, and one for data.
As far as the UI goes - first, you could display the standard progress
wheel in the activity's title bar, second, you could add a special footer to
your list view that says Loading... and is then pushed out of sight by the
new data item.
-- Kostya
04.03.2011 7:14, Chris Stewart пишет:
I have a service I'm pulling data from and they suggest doing so every
5-10 seconds it's designed to be a near-real-time experience. I'm currently
pulling this information down and displaying it in a ListView. During the
initial load, I toss up a basic ProgressDialog so the user knows information
is being loaded. However, introducing that automatically in such a short
increment of time would be an annoying user experience.
Is there a nice way to approach this problem in Android? I'd like to be
able to run an update on the data I'm pulling from the web without
disrupting the end user's experience. Ideally, not even disrupting them if
they happen to be scrolling the view. The data itself will always be
additions to data that's already been pulled down, so essentially I'm adding
records to my Adapter every 5-10 seconds.
--
Chris Stewart
http://chriswstewart.com
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