android http get with okhttp

okhttp.java

 String url = "http://api.openweathermap.org/data/2.5/weather?q=London,uk";
            OkHttpClient client = new OkHttpClient();

            try{
                Request request = new Request.Builder()
                        .url(url)
                        .build();

                Response response = client.newCall(request).execute();
                System.out.println(response.body().string());
            } catch (IOException e) {
                e.printStackTrace();
            }