Question

我有这堂课：

{"error":{"type":"ErrorException","message":"Undefined variable: slideshow","file":"\/Applications\/MAMP\/htdocs\/project\/app\/controllers\/ContactCentreSlideshowController.php","line":24}}

我可以看到地图，但地点上没有文字。

Answer 1

//You need to create a location manager object and request location updates or getlastknownlocation

LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    try {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER, 2000, 0, this);
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER, 2000, 0, this);
                } catch (java.lang.SecurityException ex) {
                    Log.i("", "fail to request location update, ignore", ex);
                } catch (IllegalArgumentException ex) {
                    Log.d("", "network provider does not exist, " + ex.getMessage());
                }

Answer 2

使用LocationManager访问位置相关数据并通过以下方式实例化：

LocationManager  mLocationmanager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);

从NETWORK_PROVIDER或GPS_PROVIDER获取位置对象。我建议从networkprovider获取位置数据，因为我使用的电池少于GPS（按照android official document）。

现在通过致电

获取您的位置

Double mUserlatitude = location.getLatitude();
Double mUserlongitude = location.getLongitude();

完整代码段如下：

LocationManager  mLocationmanager = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);
Location location = mLocationmanager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
Double mUserlatitude = location.getLatitude();
Double mUserlongitude = location.getLongitude();
Log.d("Latitude",""+mUserlatitude);
Log.d("Latitude",""+mUserlongitude );

位置不显示

2 个答案: