Moreover, I doubt Google Navigation uses an explicit WakeLock, preferring instead to use activity-based means of keeping the screen on.
On Tue, Jan 25, 2011 at 6:30 AM, Dianne Hackborn <hack...@android.com> wrote: > Navigation uses Service.startForeground() to say that the user is currently > aware of it so it can't be considered expendable. > > On Mon, Jan 24, 2011 at 5:33 PM, mikeee <mike.engelh...@gmail.com> wrote: >> >> So you're saying Google Navigation *doesn't* use a wakelock and >> continually receive gps updates or that it's somehow an evil >> application because it uses the battery quickly? >> >> >> >> >> On Jan 24, 5:24 pm, Mark Murphy <mmur...@commonsware.com> wrote: >> > On Fri, Jan 21, 2011 at 8:11 AM, mikeee <mike.engelh...@gmail.com> >> > wrote: >> > > I've got an app that starts a service in order to receive location >> > > updates from the LocationManager. The use case is the service needs >> > > to be running all the time and as such it acquires a >> > > PowerManager.PARTIAL_WAKE_LOCK in the onCreate() of the Service. >> > >> > This sounds evil from the standpoint of battery life, if nothing else. >> > >> > > But it seems from testing on several different phones and user >> > > feedback that the Service is still being put to sleep as the location >> > > notifications will stop if the application isn't in the foreground. >> > >> > Android does not put applications to sleep. In your case, Android is >> > probably terminating your service for being everlasting and using a >> > perpetual WakeLock. >> > >> > > This effectively renders the app ineffective for the task at hand. >> > > I've read posts about using an Alarm to simulate a pseudo cron job but >> > > I don't really need to be woken up in order to do a task, the app >> > > needs to run code based on the location manager calling >> > > onLocationChanged the service that the users position has changed. >> > >> > You can experiment with my LocationPoller, which is designed for your >> > scenario: >> > >> > https://github.com/commonsguy/cwac-locpoll >> > >> > > yet the fact that it >> > > effectively stops running in some cases is causing problems for the >> > > users. >> > >> > That is because you cannot write everlasting services. Please use >> > AlarmManager and something (LocationPoller or your own design) to >> > write so you do not have a service and WakeLock in memory all of the >> > time. >> > >> > -- >> > Mark Murphy (a Commons >> > Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy >> > >> > Android Training in London:http://bit.ly/smand1andhttp://bit.ly/smand2 >> >> -- >> 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 > > > > -- > Dianne Hackborn > Android framework engineer > hack...@android.com > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them. > > -- > 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 -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy Android Training in London: http://bit.ly/smand1 and http://bit.ly/smand2 -- 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
