Question

Here is a code below that suppose to listen for GPS updates and send notifications to main activity

However it does not seem to be working 🙂

No errors, only onLocationChanged is not called!

Funny thing is: when I run some other app to get GPS fix and after that start my app => onLocationChanged gets called, only accuracy is degrading, and eventually fix is lost.

I also tried to add to this code GPS listener=> it works, satellites in view got reported every second, only fix is never accuired.

What the hell is going on? 🙂

public class PhoneGPSpos{

private Handler myHandler = null;
private LocationManager lm;
private LocationListener locationListener;
private Location currentBest;
Context m_context;

public PhoneGPSpos(Context context, Handler handler) {

    myHandler = handler;
    m_context = context;


    lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

 //  Bundle bundle = new Bundle();
 //  boolean xtraInjection=lm.sendExtraCommand(LocationManager.GPS_PROVIDER,"force_xtra_injection",bundle);
 //  boolean timeInjection=lm.sendExtraCommand(LocationManager.GPS_PROVIDER,"force_time_injection",bundle);

   currentBest = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);

    locationListener = new LocationListener() 
   { 

           public void onLocationChanged(Location location)
           { 
                Log.w("Compass", "Loc");

            if (location != null)
            {
                currentBest = location;

                Message msg = new Message();

                msg.arg1 = 5;
                myHandler.sendMessage(msg);

            }
           } 

           public void onStatusChanged(String provider, int status, Bundle 
           extras) {
            Log.d("Compass", "Stat");
           } 

           public void onProviderEnabled(String provider) {
            Log.d("Compass", "Prov e");
           } 

           public void onProviderDisabled(String provider) {
            Log.d("Compass", "Prov d");
        } 
   }; 
}

public void requestGPS()
{
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
    Log.d("Compass", "gps requested");
}

public void stopGPS()
{
    Log.d("Compass", "gps stopped");
    lm.removeUpdates(locationListener);
}

public synchronized  Location getBest()
{
    return  currentBest;
}

}

Answer 1

Ok, figure out that this is an issue that was also seen by other people: apparently (at least on some phones) GPS listener works much worse if Camera is active.

Problem with getting GPS data when using CameraPreview

Android: Losing GPS signal strength on some phones when I start up the Camera and SurfaceView

Camera Preview and GPS reading in Android

Created Andorid issue for that http://code.google.com/p/android/issues/detail?id=20098

If someone has a solution pls share