public void getToken(){

    Thread thread = new Thread(new Runnable()
    {
        @Override
        public void run()
        {
            try
            {
                Request request = new Request.Builder()
                        .url(Constants.TOKEN_URL)
                        .build();

                Response response = client.newCall(request).execute();
                if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

                Headers responseHeaders = response.headers();

                for (int i = 0; i < responseHeaders.size(); i++) {

                    if (responseHeaders.value(i).startsWith(Constants.TOKEN_HEADER)) {

                        String cookies = responseHeaders.value(i);
                        String CookieValue = null;

                        if(cookies != null){
                            String[] temp=cookies.split(";");
                            for (String ar1 : temp ){
                                if(ar1.contains(Constants.TOKEN_HEADER)){
                                    String[] temp1=ar1.split("=");
                                    CookieValue = temp1[1];
                                }
                            }
                        }

                        Log.e("Token:", CookieValue);
                        String token = CookieValue;

                    }

                }

            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
        }
    });

    thread.start();

    }