If you request updates from the NETWORK_PROVIDER you will get location from cell towers or WiFi. If you use GPS_PROVIDER then the GPS will be turned on and you will get a GPS location after some time. This "some time" depends on many factors and the time of the last fix, first of all.
On Dec 29, 12:47 pm, mohammad shankayi <[email protected]> wrote: > dianne is right but this ability is only in A-gps devices and as we know all > android devices has the ability of positioning with cell towers :) > sincerely > mohammad shankayi > > > > > > > > On Wed, Dec 29, 2010 at 12:23, Dianne Hackborn <[email protected]> wrote: > > That doesn't really make sense. When you ask for location, you will > > specify how accurate you want the data to be. If you ask for GPS accuracy, > > it will start using that (if it hasn't already). You keep the request open, > > so it continuously looks for satellites and tracks movement. Each update it > > gives you includes the accuracy of the position, which is based on the > > source of the data (network, GPS, etc), and for GPS the number of > > satellites. > > > Often when you first ask for GPS data, there will be no GPS fix at all, but > > you will still be able to get some data based on cell towers. The accuracy > > information tells you how much you can infer from each report you get. But > > this is not a one-shot request -- as long as you have asked for position > > reports, it will continually monitor the location as accurately as it can. > > > There is of course the newer API to get the last location, and of course > > that is what it says -- the last reported location, whatever that was, > > without use GPS or cell towers to try to determine the current location. > > > On Wed, Dec 29, 2010 at 10:59 AM, t <[email protected]> wrote: > > >> how accurate is the data from Android's GPS location provider? > > >> does the device always try to seek a satellite, or does it sometimes > >> return an optimization of the past locations without querying the > >> satellites? > > >> if this question is device-specific, i'm asking about HTC Hero, HTC > >> Desire and Google Nexus One. > > >> thanks > > >> -- > >> 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]<android-developers%2Bunsubs > >> [email protected]> > >> For more options, visit this group at > >>http://groups.google.com/group/android-developers?hl=en > > > -- > > Dianne Hackborn > > Android framework engineer > > [email protected] > > > 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 [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-developers%2Bunsubs > > [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 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
