I report the result by using onPostExecute. Android guarantees that during a configuration change, no message will be posted to 'the' activity inbetween an onDestroy and an onCreate (i remember a post by Dianna about this).
This means that the result from the onPostExecute either arrives before the activity is destroyed or after it is created (during a configuration change). I give the requests unique IDs and save these IDs within the 'last- configuration-change' object. When the onCreate is called, i get the 'last-configuration-change' object and restore these IDs in the new activity instance. When the onPostExecute finishes, it queries which activity of the expected class is on top of the activity stack of my app. If it finds one, the result is sent to this activity and handled by it. If it can't find one, the activity has been paused (hidden) or permanently destroyed and the user is no longer interested in the result. On Jun 8, 7:45 pm, Andrew Brampton <[email protected]> wrote: > On 9 June 2010 00:02, Streets Of Boston <[email protected]> wrote: > > > "However, that approach can still lose responses or duplicate network > > usage if the Activity is destroyed/created while the AsyncTask is > > doing its job" > > > Is that an issue with the Droid-fu or with AsyncTask? > > I don't have that issue. When configuration changes take place, no new > > requests are duplicated and existing ones just keep going, as long as > > you put the AsyncTasks in a static context (not an (activity) instance > > context). > > Maybe I'm making an assumption about how you are using AsyncTask, but > what happens in the gap between the old Activity being destroyed and > before the new one has been created. What happens to the result in > that gap as you have no valid Activity to display the result? Either > you are losing your response, or you have to re-request it (hence > duplicate network usage). Or I guess you could be storing the result > temporary in your Application class? > > Andrew -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
