Java Geocoding-将经纬度转换为地址

Question

I need for my Android App the name of the city where my car is located in the moment.

I have the latitude and longitude and want to convert this with the geocoder in the address and want to get the city.

I read some blocks but because I'm new to this I dont get the clue.

Please can anyone help me how to do this?

EDIT:

I dont use this geocoding in my app. I want to use it in my Java web service and I think I have to this with HTTPRequest, is it? and with the google api url.

Answer 1

What you are looking for is Reverse Geocoding .

The Geocoder class should help you do what you need (taken from here ):

public static void getAddressFromLocation(
        final Location location, final Context context, final Handler handler) {
    Thread thread = new Thread() {
        @Override public void run() {
            Geocoder geocoder = new Geocoder(context, Locale.getDefault());   
            String result = null;
            try {
                List<Address> list = geocoder.getFromLocation(
                        location.getLatitude(), location.getLongitude(), 1);
                if (list != null && list.size() > 0) {
                    Address address = list.get(0);
                    // sending back first address line and locality
                    result = address.getAddressLine(0) + ", " + address.getLocality();
                }
            } catch (IOException e) {
                Log.e(TAG, "Impossible to connect to Geocoder", e);
            } finally {
                Message msg = Message.obtain();
                msg.setTarget(handler);
                if (result != null) {
                    msg.what = 1;
                    Bundle bundle = new Bundle();
                    bundle.putString("address", result);
                    msg.setData(bundle);
                } else 
                    msg.what = 0;
                msg.sendToTarget();
            }
        }
    };
    thread.start();
}

EDIT: As per your comment, then no, you can't use the Geocoder class on a normal Java web service. That being said, there are alternatives. The Google Geocoding API is usually a good place to start, that being said, they do seem to have limits .

Alternatively, you could take a look at Nominatim which is an open source Reverse Geocoding service albeit it seems to be slightly limited when compared to Google's services.