Question

In my app, I have to find out GPS strength. However, when I use the following code, I get 0 only for count no of satellites. So, I could not get GPS strength.

My code:

public void onCreate(Bundle savedInstanceState) {
  locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
  locMgr.addGpsStatusListener(onGpsStatusChange) ;
  onGpsStatusChange.onGpsStatusChanged(GpsStatus.GPS_EVENT_SATELLITE_STATUS);                     
 // Listener for GPS Status...
}

            final Listener onGpsStatusChange=new GpsStatus.Listener()
            {       
                    public void onGpsStatusChanged(int event)
                    {
                        Log.e("gps","in class");
                            switch(event)
                            {
                             case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
                                  GpsStatus xGpsStatus =locMgr.getGpsStatus(null) ;

                                  Iterable<GpsSatellite> iSatellites               =xGpsStatus.getSatellites();
                                  Iterator<GpsSatellite> it = iSatellites.iterator();
                                   int count=0;
                                   while(it.hasNext()){
                                    count=count+1;
                                        GpsSatellite oSat = (GpsSatellite) it.next();
                                        

                                        Log.e("gps",""+oSat.getSnr());   
                                   }
                                 Log.e("count",""+count);
                                 tv1.setText(""+count);
                             break;
                            }
                    }
            };

Answer 1

private class MyGPSListener implements GpsStatus.Listener {
    public void onGpsStatusChanged(int event) {
        switch (event) {
            case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
                if (mLastLocation != null)
                    isGPSFix = (SystemClock.elapsedRealtime() - mLastLocationMillis) < 3000;

                if (isGPSFix) { // A fix has been acquired.
                    // Do something.
                } else { // The fix has been lost.
                    // Do something.
                }

                break;
            case GpsStatus.GPS_EVENT_FIRST_FIX:
                // Do something.
                isGPSFix = true;

                break;
        }
    }
}

OK, now in onLocationChanged() you should add the following:

@Override
public void onLocationChanged(Location location) {
    if (location == null) return;
    mLastLocationMillis = SystemClock.elapsedRealtime();
    // Do something.
    mLastLocation = location;
}