无法从Android服务的onLocationChanged发送获取请求

Question

所以我有一个具有 CustomAppActivity ， LocationService 和 HttpURLCon 的Android应用，该应用具有 sent（String s）发出获取请求的方法。

我要弄清楚的是为什么我不能从 onLocationChanged（位置位置） 发送get请求（但可以通过Toast显示位置信息）。 我可以从CustomAppActivity的 onCreate（Bundle bundle）和LocationService的 onStartCommand（Intent intent，int flags，int startId）发出请求。

这是所有3类的代码（我将跳过导入）：

CustomAppActivity ：

public class CustomAppActivity extends org.qtproject.qt5.android.bindings.QtActivity {
    @Override
    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        Intent intent = new Intent(this, LocationService.class);
        HttpURLCon.send("CustomAppActivity::startService");
        startService(intent);
        QOneSignalBinding.onCreate(this, bundle);
    }
}

LocationService ：

public class LocationService extends QtService
{
    private LocationManager _locationManager = null;
    private static final String TAG = "LocationService";
    private static final int LOCATION_INTERVAL = 1000;//1800000
    private static final float LOCATION_DISTANCE = 0;//100

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

        public LocationListener(String provider)
        {
            Log.d(TAG, "LocationListener " + provider);
            _lastLocation = new Location(provider);
        }

        @Override
        public void onLocationChanged(Location location)
        {
            Log.d(TAG, "onLocationChanged: " + location);
            Context context = getApplicationContext();
            Toast.makeText(context, "location" + location, Toast.LENGTH_LONG).show();
            HttpURLCon.send("location" + location);

            _lastLocation.set(location);
        }

        @Override
        public void onProviderDisabled(String provider)
        {
            Log.d(TAG, "onProviderDisabled: " + provider);
        }

        @Override
        public void onProviderEnabled(String provider)
        {
            Log.d(TAG, "onProviderEnabled: " + provider);
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras)
        {
            Log.d(TAG, "onStatusChanged: " + provider);
        }
    }

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

    @Override
    public IBinder onBind(Intent arg0)
    {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d(TAG, "onStartCommand");
        HttpURLCon.send("LocationService::onStartCommand");
        super.onStartCommand(intent, flags, startId);
        return START_STICKY;
    }

    @Override
    public void onCreate() {
        initializeLocationManager();

        try {
            _locationManager.requestLocationUpdates(
                    LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, _locationListeners[1]);
        } catch (java.lang.SecurityException ex) {
            Log.e(TAG, "fail to request location update, ignore", ex);
        } catch (IllegalArgumentException ex) {
            Log.e(TAG, "network provider does not exist, " + ex.getMessage());
        }

        try {
            _locationManager.requestLocationUpdates(
                    LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, _locationListeners[0]);
        } catch (java.lang.SecurityException ex) {
            Log.e(TAG, "fail to request location update, ignore", ex);
        } catch (IllegalArgumentException ex) {
            Log.e(TAG, "gps provider does not exist " + ex.getMessage());
        }
    }

    @Override
    public void onDestroy() {
        Log.d(TAG, "onDestroy");
        super.onDestroy();

        if (_locationManager != null) {
            for (int i = 0; i < _locationListeners.length; i++) {
                try {
                    _locationManager.removeUpdates(_locationListeners[i]);
                } catch (Exception ex) {
                    Log.e(TAG, "fail to remove location listners, ignore", ex);
                }
            }
        }
    }

    private void initializeLocationManager() {
        Log.d(TAG, "initializeLocationManager");
        if (_locationManager == null) {
            _locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
        }
    }
}

HttpURLCon ：

public class HttpURLCon {
    private static final String TAG = "HttpURLCon";

    static void send(String s) {
        Log.d(TAG, "Sending HTTP GET request");
        new AsyncSend(s).execute();
    }

    private static class AsyncSend extends AsyncTask {
        String data;

        public AsyncSend(String data) {
            this.data = data;
        }

        @Override
        protected Object doInBackground(Object[] objects) {
         try {
            String url = "SERVER URL" + data;
            HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();
            int responseCode = con.getResponseCode();
            Log.d(TAG, "Response Code : " + responseCode);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
      }
    }
}

为什么HttpURLCon.send（“ location” + location）不起作用？