Location service (android)

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public class LocationTestActivity extends Activity implements LocationListener { private LocationManager service; private TextView tv; private String provider; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView) findViewById(R.id.display); // Get the location manager service = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Criteria criteria = new Criteria(); provider = service.getBestProvider(criteria, false); Location location = service.getLastKnownLocation(provider); // Initialize the location fields if (location != null) { onLocationChanged(location); } else { tv.setText("Location not available"); } boolean enabled = service.isProviderEnabled(LocationManager.GPS_PROVIDER); if (!enabled) { Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivity(intent); } } public void onLocationChanged(Location arg0) { //int lat = (int) (location.getLatitude()); //int lng = (int) (location.getLongitude()); //latituteField.setText(String.valueOf(lat)); //longitudeField.setText(String.valueOf(lng)); String lat = String.valueOf(arg0.getLatitude()); String lon = String.valueOf(arg0.getLongitude()); Log.e("GPS", "location changed: lat="+lat+", lon="+lon); tv.setText("lat="+lat+", lon="+lon); } public void onProviderDisabled(String arg0) { Toast.makeText(this, "Disabled provider " + provider,Toast.LENGTH_SHORT).show(); Log.e("GPS", "provider disabled " + arg0); } public void onProviderEnabled(String arg0) { Toast.makeText(this, "Enabled new provider " + provider, Toast.LENGTH_SHORT).show(); Log.e("GPS", "provider enabled " + arg0); } public void onStatusChanged(String arg0, int arg1, Bundle arg2) { Log.e("GPS", "status changed to " + arg0 + " [" + arg1 + "]"); } /* Request updates at startup */ @Override protected void onResume() { super.onResume(); service.requestLocationUpdates(provider, 400, 1, this); } /* Remove the locationlistener updates when Activity is paused */ @Override protected void onPause() { super.onPause(); service.removeUpdates(this); } }