Hi, I also experienced this problem, and found the solution was to use a timer to send a character to the server every few seconds when idle.
I was lucky that i was also writing the server code sp i could work around this. Im not sure if this solves the problem your having, but just thought id let you know of *a* solution. Im flagging this in case i learn something new :) regards, Fred On 14 December 2012 10:24, Goncalo Oliveira <[email protected]> wrote: > Hi all, > > Seems that Android is dropping idle sockets when under a mobile network. > Usually, no socket is kept alive for more than 7 minutes of inactivity. I > am using a SIM card with a particular APN, that allows idle sockets for at > least 30 minutes - this was tested using another kind of device, also > communicating with GSM, and there are no drops, so problem isn't the SIM > card. > > After a few searches in the web, I tried a few approaches to work around > this, but until now, no success. I tried using a partial wake lock after > connecting, releasing only when disconnected - didn't work. Also tried > using only a 2G network, as some said that changing from network type could > impact on this - same outcome. > > After digging a bit more and by analyzing logcat, I watched that a > CONNECTIVITY_CHANGE > is sent after some idle time, disabling the data transfer availability > (active network is mobile, no connectivity) and another one is sent > enabling it again (active network is mobile, connectivity). This cuts off > all live socket connections. > > Investigating a little bit more, I also observed that this behavior is not > consistent through all Android versions, or maybe (even worse) through > different hardware. Connectivity break is occurring in a Galaxy Tab 7 > with Android 4.0.4. The same isn't occurring in an Unitech TB 100 with > Android 3.2. > > Does anyone know where I can get more information and/or I can work around > this? I would really like to avoid sending heartbeats every 6/7 minutes. > > > Cheers > > -- > 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 -- Ubuntu Speech input<https://play.google.com/store/apps/details?id=com.nds.ubuntuspeechinput>is now available on Google Play, along with Magnetic Door Alarm app<https://play.google.com/store/apps/details?id=com.nds.magneticdooralarm> . -- 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
