环信_Android

登录成功，getContactList为null问题

我登录成功，但是
((DemoHXSDKHelper)HXSDKHelper.getInstance()).getContactList() 老是为空。但是demo中很多地方用到了这个。
我的登录代码：

if (DemoHXSDKHelper.getInstance().isLogined()) {//进入主页面

                    Intent intent = new Intent(this, MainActivity_HX.class);

                    startActivity(intent);

                }else {

                    EMChatManager.getInstance().login(user, "123456", new EMCallBack() {



                        @Override

                        public void onSuccess() {

                            Intent intent = new Intent(UserInfoActivity.this, MainActivity_HX.class);

                            startActivity(intent);

                        }



                        @Override

                        public void onProgress(int arg0, String arg1) {

                            // TODO Auto-generated method stub



                        }



                        @Override

                        public void onError(int arg0, String arg1) {

                            // TODO Auto-generated method stub

                            //crash Toast.makeText(UserInfoActivity.this, ""+arg1, Toast.LENGTH_SHORT).show();

                        }

                    });

                }