I have a very similar operation in my application. Personally, the user is using the downloaded files in some sort of sequential order, so I do them one at a time in a single background thread. To be precise, I'm trying to transfer some metadata about the image (which is in a database) as well as an image. The HTTP request (I only do one), provides an XML file detailing all the metadata / location of each image. Then, for each <Image> entry in the XML, I actually download the .jpg using an FTP library, though i supposed your HTTP would be almost identical.
Either way, I think spawning 20 threads sounds like a bad idea, even if Android can handle the overhead, it is unlikely that it will be useful for receiving your responses in a timely manner on a relatively slow network. On Jan 13, 3:12 pm, Nathan <[email protected]> wrote: > Is there a limit on the number of simultaneous http requests of the > form: > > HttpResponse response = client.execute(request); > > I'm interested in any official limit as well as practical ones. > > (In a previous life, you had to dig deep to discover that WinMo only > allowed three WebRequests to be open at a time.) > > Let's say I have a list of 20 files to download on a background > thread. > > Should I: > Download them one at a time, blocking the thread (but not the UI > thread) to wait for each one? > Start 20 threads each downloading one of the files? > > I expect the answer may be somewhere in between, where I create C > threads and work on the queue of N files, where C is a number like 3 > or 4. > > I suspect some of you here have already done some experimentation and > know the magic number. In addition, I suspect there may be more > efficient ways of doing what I'm doing than creating a new > DefaultHttpClient for each request. > > Thanks for any insights.
-- 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
