GPS doesn't work for short distances

Question

I'm using an application that uses the gps feature (using AVD on Eclipse). This application works fine when i put the coordinates with the DDMS, but if I insert a point that is very close to the previous point (20-30m), the onLocationChanged(Location loc) event is not called (but the application doesn't crash. If I insert a new point that is not so close, the even is correctly called). Is this an emulator's problem? Or is it a problem caused by the requestLocationUpdates(...) method? My code is this:

public class myActivity extends Activity 
{

    private TextView mytext;
    private LocationManager locmgr = null;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        GPSListener gpsListener=newGPSListener();
        mytext = (TextView) findViewById(R.id.mytext);

        //grab the location manager service
        locmgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        locmgr.requestLocationUpdates(locmgr.GPS_PROVIDER, 10, 10, gpsListener);

        mytext.setText("waiting for location");
    }

    //Start a location listener
    private class GPSListener implements LocationListener
    {
        public void onLocationChanged(Location loc) 
        {
            //sets and displays the lat/long when a location is provided
            String latlong = "Lat: " + loc.getLatitude() + " Long: " + loc.getLongitude();   
            mytext.setText(latlong);
        }

    public void onProviderDisabled(String provider) 
    {

    }

    public void onProviderEnabled(String provider) 
    {

    }

    public void onStatusChanged(String provider, int status,
    Bundle extras) 
    {

    }
}
 }

Answer 1

You can change the minimum distance when you call requestLocationUpdates method.

locmgr.requestLocationUpdates(locmgr.GPS_PROVIDER, 10, 2, gpsListener);

Here is the explenation.

Answer 2

I think this is correct behaviour due to GPS precision. In other words 20-30m from current point is the same position from GPS's point of view