Frank, if my AsyncTask is located in my Service, how can I use it to update the UI in my Activity? I'm a bit confused by this- I thought the AsyncTask would have to be located inside the Activity class in order to update the UI within the Activity.
On Jan 21, 8:20 pm, Frank Weiss <[email protected]> wrote: > Please reread the doc carefully. You can run stuff on the UI thread in three > of the methods. There's really no need to send a message if you make the > subclass of AsyncTask an inner class. In that case those three methods can > do anything on the enclosing Activity's behalf, like setting the contents of > a view or showing a dialog. > > > > On Thu, Jan 21, 2010 at 3:22 PM, Flapjack <[email protected]> wrote: > > According to my research, which includes reputable sources (Mark > > Murphy et al), the most preferred way of polling a remote source and > > presenting said data to the user is by creating a service and using > > AsyncTask within that service to do the polling. I have done that. > > > But, when I read the docs (http://developer.android.com/reference/ > > android/os/AsyncTask.html), there seem to be several "Threading Rules" > > that conflict with this way of doing things: "The task instance must > > be created on the UI thread." and "execute(Params...) must be invoked > > on the UI thread." As stated, I have created the task instance on the > > Service thread (not the UI thread). Am I missing something? > > > Also, when the AsyncTask finished, I sent out a Broadcast on > > onPostExecute, which is then picked up by the Activity, telling it to > > retrieve the final value again from the service (since I couldn't > > obviously update the UI from the service). I couldn't figure out any > > other way to return the result of the AsyncTask. Is this the correct > > practice? > > > Java is not my native language so please bear with my ignorance. > > Thanks! > > > -- > > 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]<android-developers%[email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > Please -- 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
