在 Android 后台服务中获取当前位置，需要在后台线程中执行。如果在主线程中执行，会导致阻塞 UI，并且后台服务会很快被销毁。

下面是获取当前位置的示例代码：

public class LocationService extends Service implements LocationListener {

    private LocationManager locationManager;
    private static final int LOCATION_INTERVAL = 1000;
    private static final float LOCATION_DISTANCE = 10f;

    private class LocationListener implements android.location.LocationListener{
        Location lastLocation;

        public LocationListener(String provider){
            lastLocation = new Location(provider);
        }

        @Override
        public void onLocationChanged(Location location) {
            lastLocation.set(location);
        }

        @Override
        public void onProviderDisabled(String provider) {}

        @Override
        public void onProviderEnabled(String provider) {}

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

    LocationListener[] locationListeners = new LocationListener[]{
            new LocationListener(LocationManager.GPS_PROVIDER),
            new LocationListener(LocationManager.NETWORK_PROVIDER)
    };

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.i("LocationService", "Start location service.");
        super.onStartCommand(intent, flags, startId);
        return START_STICKY;
    }

    @Override
    public void onCreate() {
        Log.i("LocationService", "Create location service.");
        locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);

        try {
            locationManager.requestLocationUpdates(
                    LocationManager.NETWORK_PROVIDER,
                    LOCATION_INTERVAL,
                    LOCATION_DISTANCE,
                    locationListeners[1]
            );
        } catch (SecurityException ex) {
            Log.i("LocationService", "Fail to request location update, ignore." + ex.getMessage());
        } catch (IllegalArgumentException ex) {
            Log.d("LocationService", "Network provider does not exist, " + ex.getMessage());
        }

        try {
            locationManager.requestLocationUpdates(
                    LocationManager.GPS_PROVIDER,
                    LOCATION_INTERVAL,
                    LOCATION_DISTANCE,
                    locationListeners