안드로이드 3종 GSM 핸드폰 포지셔닝 기술 분석

 
//  LocationManager  
LocationManager loctionManager; 
//  ， LocationManager  
loctionManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 

 
//  GPS  
String providerGPS = LocationManager.GPS_PROVIDER; 
Location location = loctionManager.getLastKnownLocation(providerGPS); 

 
//   
String providerNetwork = LocationManager.NETWORK_PROVIDER; 
Location location = loctionManager.getLastKnownLocation(providerNetwork); 

 
//  ， ，  
Criteria criteria = new Criteria(); 
criteria.setAccuracy(Criteria.ACCURACY_FINE);//   
criteria.setAltitudeRequired(false);//   
criteria.setBearingRequired(false);//   
criteria.setCostAllowed(true);//   
criteria.setPowerRequirement(Criteria.POWER_LOW);//   
//  ，  
String provider = loctionManager.getBestProvider(criteria, true); 
//   
Location location = loctionManager.getLastKnownLocation(provider); 

 
//  EditText  
updateWithNewLocation(location); 
//  ，2 ， 10  
loctionManager.requestLocationUpdates(provider, 1000, 1, locationListener); 

 
//   
private final LocationListener locationListener = new LocationListener() { 
@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 
} 
@Override 
public void onProviderEnabled(String provider) { 
} 
@Override 
public void onProviderDisabled(String provider) { 
} 
//   
@Override 
public void onLocationChanged(Location location) { 
//  location TextView  
updateWithNewLocation(location); 
} 
}; 
private void updateWithNewLocation(Location location) { 
if (location != null) { 
double lat = location.getLatitude(); 
double lng = location.getLongitude(); 
latStr = format.format(lat); 
lonStr = format.format(lng); 
txtLat.setText(latStr); 
txtLon.setText(lonStr); 
} else { 
txtLat.setText(""); 
txtLon.setText(""); 
} 
}