Android ESB - doRequest

public void doRequest() {
        initClient();
        Request req = new Request.Builder()
                .url(URL)
                .get()
                .build();
 
 
        client.newCall(req).enqueue(new Callback() {
            @Override
            public void onFailure(Request request, IOException e) {
 
            }
 
            @Override
            public void onResponse(Response response) throws IOException {
                try {
                    String body = response.body().string();
                    Log.d("AA", "resp [" + body + "]");
 
                    JSONObject obj = new JSONObject(body);
                    float data = (float) obj.getDouble("temp");
                    ((DataListener) ctx).notifyData(data);
                }
                catch(Throwable t) {
                    t.printStackTrace();
                }
            }
        });