Question

我正在编写此代码，以使用我的经度和纬度获取当前位置的城市名称。

这是我写的代码：

protected String currentLatitude, currentLongitude;
double lat, lon;
protected LocationManager locationManager;
private LocationListener ll;
locationManager = (LocationManager) getSystemService(
            Context.LOCATION_SERVICE);
    if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {

            Toast.makeText(this,
                    "GPS enabled. Finding fine location. ",
                    Toast.LENGTH_SHORT).show();
        ll = new GpsListener();
        locationManager.requestLocationUpdates(
                LocationManager.GPS_PROVIDER, 0, 0, ll);

    } else {
        if (locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {

                Toast.makeText(this,
                        "GPS disabled. Finding coarse location.",
                        Toast.LENGTH_SHORT).show();
            ll = new GpsListener();
            locationManager.requestLocationUpdates(
                    LocationManager.NETWORK_PROVIDER, 0, 0, ll);

        } else {
            Toast.makeText(this,
                    "Enable location settings to get current location.",
                    Toast.LENGTH_LONG).show();

        }
    }

private class GpsListener implements LocationListener {

    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub
        if (location != null) {
            try {
                Toast.makeText(getApplicationContext(), "Location Found",
                        Toast.LENGTH_SHORT).show();
            } catch (Exception e) {

            }

            lat = location.getLatitude();
            lon = location.getLongitude();

            currentLatitude = Double.toString(lat);
            currentLongitude = Double.toString(lon);
            try {
                if (ll != null)
                    locationManager.removeUpdates(ll);
            } catch (Exception e) {

            }

            locationManager = null;

        } else {
            Toast.makeText(getApplicationContext(), "No Location Found",
                    Toast.LENGTH_LONG).show();

        }

    }

    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

}// end of Class

我不知道如何从经度，纬度获得城市名称。

我尝试这样做，但地址为NULL。

Answer 1

您尝试做的是反向地理编码。您可以使用Google的解决方案，这可能不适用于任何设备（也许这是您的问题）。

或者你可以使用真正免费和开源的解决方案，如：

OpenStreetMap项目： http://nominatim.openstreetmap.org/reverse?format=xml&lat=52.5487429714954&lon=-1.81602098644987&zoom=18&addressdetails=1

您还可以使用http://wikimapia.org/ API

Answer 2

这可能对您有用，因为它会从您提供的纬度和经度返回地址..

Geocoder geocoder;
List<Address> addresses;
geocoder = new
Geocoder(this, 
      Locale.getDefault());
 addresses =
 geocoder.getFromLocation
(latitude,longitude, 1);
String address =addresses.get
(0).getAddressLine(0);
 String city =addresses.
  get(0). getAddressLine(1);

从经度和纬度获取城市名称，android

2 个答案: