//初始化：第一个参数是基本的Url地址，第二个参数是超时时间（单位为秒，可不填，默认为15s）
ApiManager.init(String baseUrl,int timeout);

    public class Api {

        private ApiService mApiService;

        private static Api sInstance;

        public static Api getInstance(){
            if(sInstance == null){
                synchronized (Api.class){
                    if(sInstance == null){
                        sInstance = new Api();
                    }
                }
            }
            return sInstance;
        }

        private Api(){
            mApiService = ApiManager.getInstance().getApiService(ApiService.class);
        }

        /**
         * 获取推荐诗词
         * @param callback
         */
        public void getRecommendPoetry(SimpleCallback<Result<PoetryInfo>> callback){
            ApiObserver.subscribe(mApiService.getRecommendPoetry(),callback);
        }

    }