Question

我写了一个代码，它给了我经度和纬度的新值。我想将它们存储在ParseUser的对象用户中。用户已有两列纬度和经度。我试图像这样更新这些值。检查代码。我做对了吗？注意我使用GooglePlay服务进行位置更新

   if(mRequestingLocationUpdates){
            ParseUser user = ParseUser.getCurrentUser();
            user.put("Latitude",lattitude);
            user.put("Longitude",longitude);
            user.saveInBackground(new SaveCallback() {
                @Override
                public void done(ParseException e) {
                    if(e != null){

                    }else
                    {

                    }
                }
            });
    }

Answer 1

最好的方法是实现LocationListener。

 public class MainActivity extends Activity implements LocationListener

在OnCreate上创建所需的一切

        mapView = (MapView) rootView.findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);

        mapView.onResume();

        try {
            MapsInitializer.initialize(getActivity().getApplicationContext());
        } catch (Exception e) {
            e.printStackTrace();
        }

        googleMap = mapView.getMap();
        googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
        googleMap.setMyLocationEnabled(true);

        // Getting LocationManager object from System Service LOCATION_SERVICE
        LocationManager locationManager = (LocationManager) getActivity().getSystemService(getActivity().LOCATION_SERVICE);

        // Creating a criteria object to retrieve provider
        Criteria criteria = new Criteria();

        // Getting the name of the best provider
        String provider = locationManager.getBestProvider(criteria, true);

        // Getting Current Location
        Location location = locationManager.getLastKnownLocation(provider);

        if (location != null) {
            onLocationChanged(location);
        }
        locationManager.requestLocationUpdates(provider, 20000, 0, this);

然后使用＆＃34; onLocationChanged＆＃34;

    @Override
    public void onLocationChanged(Location location) {

        // Getting latitude of the current location
        double latitude = location.getLatitude();

        // Getting longitude of the current location
        double longitude = location.getLongitude();

        // Creating a LatLng object for the current location
        LatLng latLng = new LatLng(latitude, longitude);

        MarkerOptions mp = new MarkerOptions();

        mp.position(new LatLng(location.getLatitude(), location.getLongitude()));

        mp.title("My Location");
        mp.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher));

        googleMap.addMarker(mp);

        // Showing the current location in Google Map
        googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

        // Zoom in the Google Map
        googleMap.animateCamera(CameraUpdateFactory.zoomTo(15));

    }

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

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

每次用户移动一点时，都会更新位置。它比每10秒检查一次并终止电池寿命更好。

如何更新解析用户ojbect。我希望每10秒后更新一次经度和纬度

1 个答案: