转载：Android实战开发之：GPS定位实例

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LocationManager locationManager;
String serviceName = Context.LOCATION_SERVICE;
locationManager = (LocationManager)getSystemService(serviceName);
// String provider = LocationManager. GPS _PROVIDER;

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 = locationManager.getBestProvider(criteria, true );

Location location = locationManager.getLastKnownLocation(provider);
updateWithNewLocation(location);
/*每隔1000ms更新一次，并且不考虑位置的变化。*/
locationManager.requestLocationUpdates(provider, 2000 , 10 ,
locationListener);
}