Robert, Could you elaborate on the "issues like these" part? Are there changes in Android that developers should be made aware?
I also have an app that uses long persistent server connection, and using GCM is not an option either. It seems that with Android 4.1 and 4.2, connections often go "dead" -- even though technically connected (at the server side), data pushed by the server stops getting through (this is verified by server logs). Android 4.0 does not seem to suffer from these issues, at least not to the same extent. A Nexus 7 and a Galaxy Nexus running the same stock 4.2.2, connected to the same server, over the same WiFi network, will experience dead connections at different rates (confirmed by logging). The suggestion to use GCM does not benefit everyone. It's nice that that Android has GTalk which provides GCM, and has its own keep-alive logic, but with it being closed source, and with apparent changes in recent Android versions, this leaves those developers who can't use GCM dead in the water. It would be great if someone from Google could comment, and explain, what's different in Android 4.1 - 4.2 with respect to long running connections, and what sort of magic is now required to keep them alive, for those apps that really need it. Thanks, -- K 2013/4/15 Robert Greenwalt <rgreenw...@google.com> > Could you use GCM <http://developer.android.com/google/gcm/index.html> instead > of rolling your own long-lived connection with independent keepalive? > It'll be better for the users battery and better for the carriers network > and you won't have to figure out issues like these. > > > On Sat, Apr 13, 2013 at 3:35 AM, Long <long...@gmail.com> wrote: > >> Hi Developers, >> I have an background service which connects my server with a TCP >> connection. >> My background service sends a ping packet to my server every 4minutes >> to keep the socket alive. >> The problem is that the device can not get the packet from the server >> after a short time(3 seconds from my test) after the ping is sent. >> This app works fine on other networks(AT&T, verizon). >> >> The strange thing is that if I force the device to connect to 3G(EVDO >> revision A), it works fine. >> >> It seems to me that, on Sprint 4G network, when an app sends a packet >> through a tcp socket, and then the socket is idle for >> several seconds, then the app will never be able to receive packets from >> this socket. >> >> I don't think it's related to the 4G signal, since this issue can be >> reproduced every time. >> >> Any suggestions? >> >> >> >> >> >> >> >> -- >> -- >> 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 >> --- >> You received this message because you are subscribed to the Google Groups >> "Android Developers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to android-developers+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > -- > 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 > --- > You received this message because you are subscribed to the Google Groups > "Android Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to android-developers+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- 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 --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.