private void addProductToCart(String productId) {

    CartentiaApplication.MY_CART_PRODUCTS.add(productId);
    AddCartRequest addCartRequest = new AddCartRequest();
    addCartRequest.setUserID(PreferenceManager.getUserID());
    addCartRequest.setProductID(productId);
    addCartRequest.setGroupID(PreferenceManager.getGroupID());
    addCartRequest.setID(1);
    String jsnRequest = new Gson().toJson(addCartRequest);
    Request request =
        new JsonPostRequestHandler(
            Request.Method.POST,
            Constants.Url.ADD_CART,
            jsnRequest,
            AddMyCartResponse.class,
            new Response.Listener<AddMyCartResponse>() {
              @Override
              public void onResponse(AddMyCartResponse response) {}
            },
            new Response.ErrorListener() {
              @Override
              public void onErrorResponse(VolleyError error) {}
            });
    VolleyManager.getInstance().addRequestToQueue(request, "AddCart");
  }
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   if (!TextUtils.isEmpty(PreferenceManager.getUserID())) {
     navigateToDashBoardActivity();
     return;
   }
   setContentView(R.layout.activity_login);
   initPresenter();
   initView();
 }