I heard that some devices allow app in background communicate but some devices not 在 2013-11-25 AM6:55，"pierre" <[email protected]>写道：
> I am having networking issues in idle mode (when the screen is off). > I have attached a test program called BeepTester, in order to explain my > difficulties. > This test program allows to start a service that in turn starts: > => a periodic timer that sends a short UDP packet (to port 7000) to the > localhost, every 4 seconds, > => a thread that listens to the UDP port 7000 and that produces a beep > sound after packet reception. > > On wakeup mode, everything goes fine, there is one beep every 4 seconds. > In "idle" mode it depends on which device we use: > On a Samsung Galaxy Note I, it works OK as in the wakeup mode. > On a Samsung Galaxy S4, it stops working once the screen goes off (there > are exceptions: we may hear some beeps occasionally, and not regularly). > I have also tried to use various kinds of wavelocks (not included in the > attached test) but It was not really effective. > > Is it normal? > And do we need to use wakelocks in order to do networking in idle mode? > > Pierre > > -- > 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 > --- > 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 [email protected]. > 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 [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 --- 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
