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

For those people like me, who are learning now/late. Have made use of the code written by @NaserShaikh below. Here you go a working code to get driving distance on google map when u have lat,long of two points!! distance is in miles ! There are better way to parse the JSON response pls look for it. Havent tested it for extremes when there is a ocean btw and other stuffs. Hope it helps.

package havefun;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.json.JSONArray;
import org.json.JSONObject;

class Distance {
    private Double dist;
    public Distance() {
        dist = (double) -1;

    }

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

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

              CloseableHttpClient httpClient = HttpClientBuilder.create().build();
                try {

                 CloseableHttpResponse 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());
                    //System.out.println(jsonObject);
                    //System.out.println("========================");
                    //System.out.println(jsonObject.get("status"));
                    if (jsonObject.get("status").toString().equals("OK") == false) {
                        System.err.println("Error");
                        return dist;
                    }

                    String distance = jsonObject.getJSONArray("routes").getJSONObject(0).getJSONArray("legs").getJSONObject(0).getJSONObject("distance").getString("text");

                    System.out.println(distance);

                    String temp[] = distance.split(" ");
                    System.out.println(temp[1]);
                    System.out.println(temp[0]);

                    dist = Double.parseDouble(temp[0]);
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                return dist;

        }


    public static void main(String[] args) {
        Distance d = new Distance();
            Double dist = d.getDistance();
            System.out.println("Distance ="+dist);
    }
}