How to get Latitude and Longitude from address name

Question

I have a address name , i want to get the Latitude and Longitude from my app , i reference some tutorial , i still can't get it successfully in the end.

The log value is empty.

What step i miss it ? any help would be grateful,thanks.

global variable:

double editLatitude, editLongitude;

my Geocoder:

 Geocoder coder = new Geocoder(getActivity());
            List<Address> address;

            try {
                address = coder.getFromLocationName("Las Vegas", 5);
                if (address == null) {
                    return null;
                }
                Address location = address.get(0);
                editLatitude = location.getLatitude();
                editLongitude = location.getLongitude();
                Log.d("editLatitude", editLatitude + ">>>>>>>>>>>>>>>>>>");
                Log.d("editLongitude", editLongitude + ">>>>>>>>>>>>>>>>>>");
            } catch (IOException ex) {
                ex.printStackTrace();
            }

i set the latitude and longitude over here:

 @Override
        public void onLocationChanged(Location location) {
            mLastLocation = location;
            if (mCurrLocationMarker != null) {
                mCurrLocationMarker.remove();
            }

            //Place current location marker
            //LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
            //LatLng latLng = new LatLng(22.751262, 121.140801);
//---------------------------------------------
            LatLng latLng = new LatLng(editLatitude, editLongitude);
            MarkerOptions markerOptions = new MarkerOptions();
            markerOptions.position(latLng);
            markerOptions.title("Current Position");
            markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
            mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);

            //move map camera
            mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
            mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(16));

            //optionally, stop location updates if only current location is needed
            if (mGoogleApiClient != null) {
                LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
            }
        }

Possible duplicate of [Get latitude,longitude from address in Android](http://stackoverflow.com/questions/17835426/get-latitude-longitude-from-address-in-android) — Arpan24x7, Jan 25 '17 at 06:50
so some devices will not support my function ? my device is Huawei mate 8 — Morton, Jan 25 '17 at 07:09
it may possible there is device issue. https://support.strava.com/hc/en-us/articles/216942547-How-to-fix-GPS-recording-issues-on-Huawei-phones — Arpan24x7, Jan 25 '17 at 07:28
thanks for sharing the link , but if my app was used for everyone , obviously not a solution. — Morton, Jan 25 '17 at 07:48

Rajesh Panchal · Accepted Answer · 2017-01-25T07:32:36.640

create a method that returns a JSONObject with the response of the HTTP Call like following

public static JSONObject getLocationInfo(String address) {
    StringBuilder stringBuilder = new StringBuilder();
    try {

    address = address.replaceAll(" ","%20");    

    HttpPost httppost = new HttpPost("http://maps.google.com/maps/api/geocode/json?address=" + address + "&sensor=false");
    HttpClient client = new DefaultHttpClient();
    HttpResponse response;
    stringBuilder = new StringBuilder();


        response = client.execute(httppost);
        HttpEntity entity = response.getEntity();
        InputStream stream = entity.getContent();
        int b;
        while ((b = stream.read()) != -1) {
            stringBuilder.append((char) b);
        }
    } catch (ClientProtocolException e) {
    } catch (IOException e) {
    }

    JSONObject jsonObject = new JSONObject();
    try {
        jsonObject = new JSONObject(stringBuilder.toString());
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return jsonObject;
}

now pass that JSONObject to getLatLong() method like following

public static boolean getLatLong(JSONObject jsonObject) {

    try {

        longitute = ((JSONArray)jsonObject.get("results")).getJSONObject(0)
            .getJSONObject("geometry").getJSONObject("location")
            .getDouble("lng");

        latitude = ((JSONArray)jsonObject.get("results")).getJSONObject(0)
            .getJSONObject("geometry").getJSONObject("location")
            .getDouble("lat");

    } catch (JSONException e) {
        return false;

    }

    return true;
}

thanks for your help , but what is PincodeVerify.class exactely? — Morton, Jan 25 '17 at 07:06
@徐博俊 Don't bother about the code just try this url http://maps.googleapis.com/maps/api/geocode/json?address=Las%20Vegas .. Parse the json and you will get the lat and long — Sunil Sunny, Jan 25 '17 at 07:24
Ok i got you , i will use AsyncTask to complete it , but i found it's not very accurate even i know the address , it shows nothing from json sometimes. — Morton, Jan 25 '17 at 07:35

score 0 · Answer 2 · answered Jan 25 '17 at 06:44

0

try this

double Lat = geocoder.getFromLocationName(address_name, 1).get(0).getLatitude();
double Lon = geocoder.getFromLocationName(address_name, 1).get(0).getLongitude();

answered Jan 25 '17 at 06:44

Patel Pinkal

8,984
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1

thanks for your help , i tried it , it's not working for me. – Morton Jan 25 '17 at 07:06

How to get Latitude and Longitude from address name

2 Answers2