> Hi, > I'd like to create some sort of Thread which can be accessed by my > main program.. > Specifically I'd like two classes, both with their own thread, one for > parsing XML data and one for doing database operations, without > actually interfering with the main UI-thread (slowdowns for > example)...
Use AsyncTask for each of these. > I was wondering if those should just extend Runnable, and maybe make > them some sort of Singleton, or if these should be implemented as a > Service ? Use AsyncTask, perhaps mediated by a Service. I'd probably use a Service, only because I like a stable foundation where I can get it, and activities tend to be twitchy (e.g., user presses BACK, and they get destroyed). But, since you're asking this in a very abstract fashion, I have no idea if a Service is necessarily right for your case. Another possibility, instead of AsyncTask, is to use an IntentService. They both allow you to do work in the background without your own thread management. I tend to use IntentService more for totally asynchronous stuff (e.g., app widget updates, alarms with AlarmManager, etc.), where I want the service to go away when there's no outstanding work to do. > Or maybe they shouldnt be implemented at all as an > individual Thread ? Forking your own threads should only be taken after you have investigated AsyncTask. AsyncTask doesn't handle every scenario where you might use threads. However, since AsyncTask lets you do background work without your own thread-management code, it is definitely worth looking into. At the risk of sounding self-serving, you might want to look into getting a book that covers threads and services in Android. The questions that you are asking are rather involved -- I've barely scratched the surface of the subject in this reply. -- Mark Murphy (a Commons Guy) http://commonsware.com Android App Developer Books: http://commonsware.com/books.html -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
