Example using DavidWebb with Google-API

gistfile1.java

package com.goebl.david;

import org.json.JSONArray;
import org.json.JSONObject;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 * Real world testing a Google API.
 *
 * @author goebl
 * @since 15.12.13
 */
public class TestWithGoogleApi {

    // this is a replacement for com.google.android.maps.GeoPoint
    private static class GeoPoint {
        final int latitudeE6;
        final int longitudeE6;

        private GeoPoint(int latitudeE6, int longitudeE6) {
            this.latitudeE6 = latitudeE6;
            this.longitudeE6 = longitudeE6;
        }

        private GeoPoint(double latitude, double longitude) {
            this.latitudeE6 = (int) (latitude * 1e6);
            this.longitudeE6 = (int) (longitude * 1e6);
        }

        public int getLatitudeE6() {
            return latitudeE6;
        }

        public int getLongitudeE6() {
            return longitudeE6;
        }

        public String toString() {
            return (latitudeE6 / 1e6) + "," + (longitudeE6 / 1e6);
        }
    }


    @Test
    public void getDistance() throws Exception {

        GeoPoint src = new GeoPoint(47.8227, 12.096933);
        GeoPoint dest = new GeoPoint(47.8633, 12.215533);

        Webb webb = Webb.create();
        JSONObject result = webb
                .get("http://maps.googleapis.com/maps/api/directions/json")
                .param("origin", src)
                .param("destination", dest)
                .param("mode", "walking")
                .param("sensor", "true")
                .asJsonObject()
                .getBody();

        assertNotNull(result);
        // System.out.println(result.toString(2));

        JSONArray array = result.getJSONArray("routes");
        JSONObject routes = array.getJSONObject(0);
        JSONArray legs = routes.getJSONArray("legs");
        JSONObject steps = legs.getJSONObject(0);
        JSONObject distance = steps.getJSONObject("distance");

        int iDistance = distance.getInt("value");
        // System.out.println(distance.toString());

        assertEquals("distance ~11.6km", iDistance / 1000f, 11.6f, 1f);
    }

}