point condition to be remove

If I 'm using GPS and adding some Over lay items in the map and i want to play a game when ever my current location is == to the over lay item then remove this item the problem is due to the gps inaccuracy i want to make a margin error around the over lay item so what i did is Since the P is the geo poi开发者_如何学JAVAnt of the overlay item

enter code here
   int error =10 ;
if (loc.getLatitude() * 1E6>=p.getLatitudeE6()-error&&loc.getLongitude() * 1E6 < p.getLatitudeE6()+error)
 mapView.getOverlays().remove(itemizedOverlay);
  mapView.invalidate();

so the question now is this if condition is true or what ??

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Use LocationManager.addProximityAlert(double latitude, double longitude, float radius, long expiration, PendingIntent intent). The radius will be the distance you are to the POI.