[android-developers] Re: Can GPS work without internet access in Android phone?

Hi, Kristopher

Thank you for your reply.
The test I did before is indoor.
After someone give me a hint, I do a test outdoor, it worked, it can
get the position.
To get the first point of position, I waited around 15 minutes.

Thanks and Regards,
Kenneth

On 10月31日, 下午6時55分, Kristopher Micinski <krismicin...@gmail.com>
wrote:
> And you were also outside during these 15 minutes?
>
> Kris
>
>
>
>
>
>
>
> On Mon, Oct 31, 2011 at 1:01 AM, Kenneth WON <kenneth...@gmail.com> wrote:
> > Hi, Kristopher,
>
> > Thank you for your reply. Yes, I waited it more than 15 minutes. And
> > following is my code, I have no idea where's wrong, please feel free
> > to have a look, and If you don't mind, please give me some hints Thank
> > you!
>
> > import android.app.Service; import android.content.Intent; import
> > android.location.Location; import
> > android.location.LocationListener; import
> > android.location.LocationManager; import android.os.Binder; import
> > android.os.Bundle; import android.os.Handler; import
> > android.os.IBinder; import android.util.Log; public class GPSService
> > extends Service implements LocationListener {   private Handler
> > requestLocUpdateHandler = new Handler();   private LocationManager
> > locationMgr;   private static int locUpdateTime = 30000;   // Bind for
> > Service Connection   class GPSServiceBinder extends Binder {
> > GPSService getService() {       return GPSService.this;     }   }   //
> > define ACTION   public static final String ACTION = "GPS Service
> > Broadcast";   @Override   public void onCreate() {
> > super.onCreate();     locationMgr =
> > (LocationManager) getSystemService(LOCATION_SERVICE);
> > requestLocUpdateHandler.postDelayed(requestLocUpdateTask, 1000);   }
> > private void updateLocStatus(Location loc) {     if (loc != null) {
> >     double latitude = loc.getLatitude();       double longitude =
> > loc.getLongitude();       long locTime = loc.getTime();       String
> > dateTime = Utils.dateFormat.format(locTime);       Log.w("Location
> > Info", loc.getAccuracy() + " | " + loc.getProvider());
> > Log.w("GPS", "Time: " + dateTime + " | Lat: " + latitude + " | Long: "
> > + longitude);     }   }   private Runnable requestLocUpdateTask = new
> > Runnable() {     @Override     public void run() {
> > requestLocUpdate();
> > requestLocUpdateHandler.postDelayed(requestLocUpdateTask, locUpdateTime);
> >   }   };   private void requestLocUpdate() {
> > locationMgr.removeUpdates(this);
> > locationMgr.requestLocationUpdates(LocationManager.GPS_PROVIDER, 3000,
> > 0, this);   }   @Override   public IBinder onBind(Intent arg0) {
> > return new GPSServiceBinder();   }   @Override   public void
> > onRebind(Intent intent) {   }   @Override   public boolean
> > onUnbind(Intent intent) {     return true;   }   @Override   public
> > void onLocationChanged(Location location) {
> > updateLocStatus(location);   }   @Override   public void
> > onProviderDisabled(String provider) {   }   @Override   public void
> > onProviderEnabled(String provider) {   }   @Override   public void
> > onStatusChanged(String provider, int status, Bundle extras) {   }
> > @Override   public void onDestroy() {     super.onDestroy();
> > locationMgr.removeUpdates(this);   }   @Override   public void
> > onStart(Intent intent, int startId) {     super.onStart(intent,
> > startId);   } }
> > Thanks and Regards, Kenneth Won
>
> > On 10月31日, 上午11時22分, Kristopher Micinski <krismicin...@gmail.com>
> > wrote:
> >> Cold starts can take up to 15 minutes...
>
> >> Did you wait 15 minutes...
>
> >> On Sun, Oct 30, 2011 at 11:17 PM, Kenneth WON <kenneth...@gmail.com> wrote:
> >> > Hi, lbendlin,
>
> >> > Thank you for your reply.
> >> > I am really facing this issue.
> >> > When I turn off the Network (WiFi and/or cell network), the app cannot
> >> > obtain (GPS / A-GPS) position.
> >> > Then I turn the network on, it can get the (GPS / A-GPS) position
> >> > successfully.
> >> > What's wrong?
>
> >> > Thanks and Regards,
> >> > Kenneth Won
>
> >> > On 10月31日, 上午8時30分, lbendlin <l...@bendlin.us> wrote:
> >> >> GPS can work very well without internet access - after it got the first
> >> >> fix.  The internet access is used to download satellite position data to
> >> >> the GPS receiver which speeds up the TTFF (time to first fix).  Without the
> >> >> extra help the first fix can take quite some time, especially when you are
> >> >> already moving.
>
> >> >> Go to a location with unobstructed sky view and let the GPS receiver get a
> >> >> fix. Then check how it performs on subsequent fixes.
>
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