Distance between two location in Android map

Question

How to calculate distance between 2 location in android map & output must display in textview or any ?

Answer 1

i think you need googleapi for that, i had use such service before.. you can get distance from your current location to destination.

simply uee following url:

http://maps.googleapis.com/maps/api/directions/json?origin=%f,%f&destination=%f,%f&sensor=false&mode=driving

here, origin=%f,%f = origin=latitude,longitude destination=%f,%f = destination=latitude,longitude

google response:

{

    "routes": [
        {
            "bounds": {
                "northeast": { … },
                "southwest": { … }
            },
            "copyrights": "Map data ©2012 Inav/Geosistemas SRL",
            "legs": [
                {
                    "distance": {
                        "text": "1 m",
                        "value": 0
                    },
                    "duration": { … },
                    "end_address": "Formosa Province, Argentina",
                    "end_location": { … },
                    "start_address": "Formosa Province, Argentina",
                    "start_location": { … },
                    "steps": [ … ],
                    "via_waypoint": [ ]
                }
            ],
            "overview_polyline": { … },
            "summary": "RP 3",
            "warnings": [ ],
            "waypoint_order": [ ]
        }
    ],
    "status": "OK"

}

Above u can see

"distance": {
                            "text": "1 m",
                            "value": 0
                        },

there is your distance:

code may look like this:

private void getDistance(){
StringBuffer jsonString = new StringBuffer();

        httpPost = new HttpPost("http://maps.googleapis.com/maps/api/directions/json?origin=,&destination=,&sensor=false&mode=driving");


        try {
            httpPost.setEntity(new UrlEncodedFormEntity(params));
            httpResponse = httpClient.execute(httpPost);

            InputStream in = httpResponse.getEntity().getContent();
            int ch = 0;
            while ((ch = in.read()) != -1) {
                jsonString.append((char) ch);
            }
            in.close();

            JSONObject jsonObject = new JSONObject(jsonString.toString());
            JSONArray jsonArray = jsonObject.getJSONArray(""legs");
            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jObj = jsonArray.getJSONObject(i);

                String text = jObj.getString("text");
                String value = jObj.getString("value");//value is ur distance
            }



        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

}

hope it help.