Getting strange characters when try to get location info with google's geocode api

In my app a try to get location names via tapping on google map. Everything works fine except for the character encoding.

My output is like:

1144 Budapest, Ond vezér útja 35, Hungary

How could i set character encoding to get the correct response like:

1144 Budapest, Ond vezér útja 35, Hungary

I tried with .setHeader("Accept-Charset", "utf-8"); but not working this way.

Code:

public static JSONObject getLocationInfo(double lat, double lng) {

        HttpGet httpGet = new HttpGet("http://maps.googleapis.com/maps/api/geocode/json?latlng=" + lat + "," + lng + "&sensor=true");
        httpGet.setHeader("Accept-Charset","utf-8");

        HttpClient client = new DefaultHttpClient();
        HttpResponse response;
        StringBuilder stringBuilder = new StringBuilder();



        try {
            response = client.execute(httpGet);
            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) {
            e.printStackTrace();
        }

        return jsonObject;
    }

E D I T:

I made this work with:

BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
            String line;
            while ((line = reader.readLine()) != null) {
                stringBuilder.append(line);
            }

Thanks for the answer.