Mi programa utiliza instrucciones de Google Maps para los servicios web para encontrar una ruta entre dos puntos. El resultado se analiza y almacena en variable.
Esta variable se utiliza para componer la URL del mapa estático de Google.

El análisis y la URL funcionan correctamente. El problema es que la "ruta" dibujada pasa a través de un lago y montañas.

{
    String GPS = "-22.978823,-43.233249";
    String link = MAPS_BASE_URL + "center=brazil," + GPS + 
            "&markers=color:blue|brazil," + GPS +
            "&path=color:0xff0000ff" + "%s" + 
            "&zoom=13&size=1024x1024&sensor=false"; 
    String htmlContent = "";
    String direction_URL= "";

    URL url = null;
    String parsedStr = null;
    Scanner scan = null;

    origin = GPS;
    destination ="Maracanã";

    try { 
        direction_URL = MAPS_DIRECTIONS_URL;    
        direction_URL += URLEncoder.encode(origin, "UTF-8");
        direction_URL += "&destination=";
        direction_URL += URLEncoder.encode(destination, "UTF-8");
        direction_URL += "&key=AIzaSyARNFl6ns__p2OEy3uCrZMGem8KW8pXwAI";
    }catch(UnsupportedEncodingException e){
         Logger.getLogger(Service.class.getName()).log(Level.SEVERE, null, e);
    }

    try {
        url = new URL(direction_URL);
    } catch (MalformedURLException ex) {
        Logger.getLogger(AlertService.class.getName()).log(Level.SEVERE, null, ex);
    }

    try {
        scan = new Scanner(url.openStream());
    } catch (IOException ex) {
,        Logger.getLogger(AlertService.class.getName()).log(Level.SEVERE, null, ex);
    }

    String str = new String();
    while (scan.hasNext())
        str += scan.nextLine();
    scan.close();

    parsedStr = parseJson(str);

    try {
        InputStream htmlInputStream = 
                AlertService.class.getResourceAsStream("/resources/gapi.html");

        BufferedReader htmlReader = new BufferedReader(
                new InputStreamReader(htmlInputStream));

        String locationsContent = "";
        String wilcardContent = "";

        Scanner strScanner = new Scanner(parsedStr);

        while (strScanner.hasNextLine()) 
        {
            locationsContent = strScanner.nextLine() + "\n";

            StringTokenizer st = new StringTokenizer(locationsContent, ";");
            if (st.countTokens() == 2)
                wilcardContent += "|" + st.nextToken().trim()
                        + "," + st.nextToken().trim();
        }
        link = link.replaceFirst("%s", wilcardContent);

        htmlContent = "";
        while (htmlReader.ready()) 
            htmlContent += htmlReader.readLine() + "\n";

        htmlContent = htmlContent.replaceAll("%s", link);

     } catch (FileNotFoundException ex) {
        Logger.getLogger(Service.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(Service.class.getName()).log(Level.SEVERE, null, ex);
    } 
   return htmlContent;
}

Función de análisis:

 private String parseJson(String s){
    String  coordinates = new String ();
    final JSONObject json = new JSONObject(s);
    final JSONObject jsonRoute = json.getJSONArray("routes").getJSONObject(0);
    //Get the leg, only one leg as we don't support waypoints
    final JSONObject leg = jsonRoute.getJSONArray("legs").getJSONObject(0);
    //Get the steps for this leg
    final JSONArray steps = leg.getJSONArray("steps");
    //Number of steps for use in for loop
    final int numSteps = steps.length();

    for(int i = 0; i< numSteps; ++i){
        final JSONObject step = steps.getJSONObject(i);

        final JSONObject startLocation = step.getJSONObject("start_location");
        final Double startLat = startLocation.getDouble("lat");
        final Double startlng = startLocation.getDouble("lng");

        final JSONObject endLocation = step.getJSONObject("end_location");
        final Double endtLat = endLocation.getDouble("lat");
        final Double endtlng = endLocation.getDouble("lng");

        coordinates = coordinates.concat(" ");    
        coordinates = coordinates.concat(startLat.toString());
        coordinates = coordinates.concat(";" + " ");
        coordinates = coordinates.concat(startlng.toString());
        coordinates = coordinates.concat("\n");  

        coordinates = coordinates.concat(" ");    
        coordinates = coordinates.concat(endtLat.toString());
        coordinates = coordinates.concat(";" + " ");
        coordinates = coordinates.concat(endtlng.toString());
        coordinates = coordinates.concat("\n");      
    } 
    return coordinates;     
}

Respuesta de Json:

https://maps.googleapis.com/maps/api/directions/json?origin=-22.978823,-43.233249&destination=Maracan%C3%A2&key=AIzaSyARNFl6ns__p2OEy3uCrZMGem8KW8pXwAI

La URL final se ve así:

http: //maps.google.com/maps/api/staticmap? center = brazil, -22.978823, -43.233249 & markers = color: blue | brazil, -22.978823, -43.233249 & path = color: 0xff0000ff | -22.9783362, -43.2336781 | . -43.2196208 | -22.9771399, -43.2196208 | -22.9624962, -43.20396840000001 | -22.9624962, -43.20396840000001 | -22.9583858, -43.2043807 | -22.9583858, -43.943807 | -22.934896, 43.43. 43.2096873 | -22.9333061, -43.2096873 | -22.913577, -43.2099889 | -22.913577, -43.2099889 | -22.9106681, -43.2154625 | -22.9106681, -43.2154625 | -22.9101261, -43.2217923 | -22.9114561, -43.2254838 | -22.9135546, -43.2276606 & zoom = 13 & size = 1024x1024 & sensor = false