The only two types of wakelocks are partial and full. A full wakelock will keep the screen from automatically turning off, and the screen being on will definitely mean the sensors are running. Once the user presses the power button and turns the screen off, though, you are in no better a state than holding a partial wake lock.
On Wed, Jul 20, 2011 at 11:40 AM, Filip Havlicek <havlicek.fi...@gmail.com>wrote: > If you are trying to develop a market application, I think there is no > workaround. If you just want to experiment with the accelerometer data, you > can try different types of wakelock as Mark suggested, some of them might > work. Or just keep the device awake while you do the experiments (although > you might need to recharge the device every few hours). It might be possible > to do something about it on the OS level if you root your devices, although > that would need a bit more digging. > > Best regards, > Filip Havlicek > > 2011/7/20 Chris Conry <cjco...@gmail.com> > >> Thanks for the answers, >> Makes sense now, I am using the myTouch 4g and LG ally, sadly both of them >> I guess turn off their sensors. Its good to hear that the Nexus and some 2.3 >> device keep it on and hopefully other manufacturers adopt this. >> >> I guess i'm going to try and find a work around. Any suggestions? >> Thank you >> >> On Wed, Jul 20, 2011 at 12:42 PM, Filip Havlicek < >> havlicek.fi...@gmail.com> wrote: >> >>> Partial wake lock works just fine with accelerometer sensor on Nexus One >>> 2.2 (tested this for over than 6 months as a part of my research), although >>> this might not be the case for different combination of device and OS >>> version. >>> >>> >>> 2011/7/20 Dianne Hackborn <hack...@android.com> >>> >>>> Prior to 2.3 the sensors were turned off when the screen went off in >>>> order to reduce battery use. This was changed on 2.3, though it's possible >>>> we are actually going to end up regretting that change. :p >>>> >>>> Also even as of 2.3, I wouldn't be surprised if some device's drivers >>>> are still turning off the sensor hardware as part of their power management >>>> when the screen goes off. >>>> >>>> On Wed, Jul 20, 2011 at 8:53 AM, Chris Conry <cjco...@gmail.com> wrote: >>>> >>>>> And your guess was completely correct. Thank you. The problem is >>>>> still happening, as soon as I hit the power button the data stops logging. >>>>> Is there something else im missing about wakelock? >>>>> >>>>> >>>>> On Wed, Jul 20, 2011 at 11:26 AM, Mark Murphy <mmur...@commonsware.com >>>>> > wrote: >>>>> >>>>>> Use adb logcat, DDMS, or the DDMS perspective in Eclipse to examine >>>>>> LogCat and look at the stack trace associated with your runtime error. >>>>>> My guess is that you do not hold the WAKE_LOCK permission. >>>>>> >>>>>> On Wed, Jul 20, 2011 at 11:21 AM, Chris Conry <cjco...@gmail.com> >>>>>> wrote: >>>>>> > Thanks for the replys, >>>>>> > Looking into it the partial wake lock should be my solution, but it >>>>>> isnt >>>>>> > implementing well. I keep getting a runtime error on acquire(). my >>>>>> code >>>>>> > looks like: >>>>>> > PM = (PowerManager) >>>>>> getSystemService(Context.POWER_SERVICE); >>>>>> > WL= PM.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Wakelock"); >>>>>> > WL.acquire(); >>>>>> > I put this in the onStartCommand(), is that incorrect? Should >>>>>> > only acquire the wakelock when the screen turns off? >>>>>> > Thank you >>>>>> > On Wed, Jul 20, 2011 at 3:59 AM, Filip Havlicek < >>>>>> havlicek.fi...@gmail.com> >>>>>> > wrote: >>>>>> >> >>>>>> >> Acquire a partial wake lock, that should help. >>>>>> >> >>>>>> >> 2011/7/20 Jan Nielsen <j...@air-port.dk> >>>>>> >>> >>>>>> >>> The common ways to sleep in java, only counts cpu time on the >>>>>> Android >>>>>> >>> platform. >>>>>> >>> So a Thread.sleep(60 * 1000); may become 5 or 10 minutes if the >>>>>> phone >>>>>> >>> is in standby, since it only counts when the cpu is awake. >>>>>> >>> >>>>>> >>> afaik you need to use AlarmManager to get called when the phone is >>>>>> in >>>>>> >>> standby. >>>>>> >>> Even a handler postDelayed wont work, as that is also wake time. >>>>>> >>> >>>>>> >>> On 19 Jul., 23:20, Chris Conry <cjco...@gmail.com> wrote: >>>>>> >>> > I'm trying to build an app that logs sensor data(using a >>>>>> service), and >>>>>> >>> > stores it into an SQLite database. My problem is that it stops >>>>>> logging >>>>>> >>> > when >>>>>> >>> > the screen is off. It works perfectly fine when the screen is >>>>>> on, but >>>>>> >>> > when i >>>>>> >>> > turn the screen off the data doesn't start logging until I turn >>>>>> the >>>>>> >>> > screen >>>>>> >>> > on. The process isn't being killed, because it works when the >>>>>> screen >>>>>> >>> > comes >>>>>> >>> > back on. >>>>>> >>> > >>>>>> >>> > I've tried implementing it as a Thread. I think that wont work >>>>>> because >>>>>> >>> > it >>>>>> >>> > needs a context for the database. And I read that using >>>>>> >>> > "startForeground", >>>>>> >>> > but it didn't change. >>>>>> >>> > >>>>>> >>> > Any Suggestions? Can anyone help? >>>>>> >>> > >>>>>> >>> > Thank you >>>>>> >>> >>>>>> >>> -- >>>>>> >>> 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 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 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...At Your Office: http://commonsware.com/training >>>>>> >>>>>> -- >>>>>> 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 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 >>>> >>> >>> -- >>> 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 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 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
