> You could either cache the results locally and return them when asked,
I was doing that earlier but since i switched to a content provider, i
decided to store data in
a SQlite database rather than a file. I also have to check for the
validity of the data on the device as it needs to be replaced
after a certain time interval.
> or better you could document that using your provider takes
> significant time and that users should do the calls asynchronously. In
> general it's good for applications to do content provider call
> asynchronously, since even local database operations could become
> pretty expensive. See the AsyncQueryHandler class, which handles much
> of the thread for you when trying to do async queries, or you could
> also use the wonderful UserTask class in the calling app to do the
> query asynchronously.
I had a look at the AsyncQueryHandler class. Since it's an abstract
class,
would i have to extend it to make it work? I tried looking for
examples on
Google on how to use this class but couldn't find anything. I found
what it does but didn't find anything on How to use it.
Also, i still have a doubt after your response.
In my initial approach, when i was not using a Content Provider, i was
using the UserTask class to make my network requests (So that my UI
didn't make a blocking call and the data was received in a separate
thread).
In my new approach with a Content Provider, if the caller app is using
the AsyncQueryHandler or the UserTask class, (which i think starts
another thread) , does that mean the Content Provider doesn't need to
use the UserTask class to make a network request or does it still need
to make the request in a separate thread.?
A clarification would be greatly appreciated.
> Also, note that CursorAdapter has the
> changeCursor() method, which helps with doing async things.
I am not currently using a Adapter. It wasn't as simple as connecting
a ListView with a Adapter
and that's why, i decided to update the Views myself by extracting the
info from the cursor.
- Kavik
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