It probably uses FLAG_KEEP_SCREEN_ON for its window to keep the screen on while in its UI, and also holds a partial wake lock to keep the device running while you are not in its UI.
On Tue, Jan 25, 2011 at 12:38 AM, Mark Murphy <mmur...@commonsware.com>wrote: > 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<android-developers%2bunsubscr...@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<android-developers%2bunsubscr...@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<android-developers%2bunsubscr...@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
