refactor:根据规范，重构代码

lib/components/cate_card.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+
 import '../model/cat.dart';
 import '../resources/widget_name_to_icon.dart';
 import '../components/widget_item_container.dart';

lib/components/category.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+
 import '../routers/application.dart';
 import '../model/cat.dart';
 import '../model/widget.dart';

lib/components/disclaimer_msg.dart

@@ -1,14 +1,14 @@
-/**
- * Created with Android Studio.
- * User: 一晟
- * Date: 2019/1/12
- * Time: 下午9:19
- * email: zhu.yan@alibaba-inc.com
- */
+/// Created with Android Studio.
+/// User: 一晟
+/// Date: 2019/1/12
+/// Time: 下午9:19
+/// email: zhu.yan@alibaba-inc.com
+
+import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
-import 'dart:async';
+
 
 const disclaimerText1 =
     '\r\r\r\r\r\r本APP属于个人的非赢利性开源项目，以供开源社区使用，凡本APP转载的所有的文章 、图片、音频、视频文件等资料的版权归版权所有人所有，本APP采用的非本站原创文章及图片等内容无法一一和版权者联系，如果本网所选内容的文章作者及编辑认为其作品不宜上网供大家浏览，或不应无偿使用请及时用电子邮件或电话通知我们，以迅速采取适当措施，避免给双方造成不必要的经济损失。';

lib/components/full_screen_code_dialog.dart

@@ -1,10 +1,10 @@
-/*
- * @Author: 一凨 
- * @Date: 2019-01-14 11:42:32 
- * @Last Modified by: 一凨
- * @Last Modified time: 2019-01-14 14:42:00
- */
+/// @Author: 一凨 
+/// @Date: 2019-01-14 11:42:32 
+/// @Last Modified by: 一凨
+/// @Last Modified time: 2019-01-14 14:42:00
+
 import 'package:flutter/material.dart';
+
 import 'package:flutter_go/utils/example_code_parser.dart';
 import 'package:flutter_go/utils/syntax_highlighter.dart';
 

lib/components/home_banner.dart

@@ -1,5 +1,7 @@
 import 'dart:async';
+
 import 'package:flutter/material.dart';
+
 import '../model/story.dart';
 
 class HomeBanner extends StatefulWidget {

lib/components/list_refresh.dart

@@ -5,9 +5,10 @@
 /// email: zhu.yan@alibaba-inc.com
 /// target: ListRefresh 的示例
 
-import 'package:flutter/material.dart';
 import 'dart:async';
 
+import 'package:flutter/material.dart';
+
 class ListRefresh extends StatefulWidget {
   final renderItem;
   final requestApi;

lib/components/list_view_item.dart

@@ -1,9 +1,8 @@
-/*
- * @Author: 一凨 
- * @Date: 2019-01-14 17:53:54 
- * @Last Modified by: 一凨
- * @Last Modified time: 2019-01-14 17:57:51
- */
+/// @Author: 一凨 
+/// @Date: 2019-01-14 17:53:54 
+/// @Last Modified by: 一凨
+/// @Last Modified time: 2019-01-14 17:57:51
+
 import 'package:flutter/material.dart';
 import '../routers/application.dart';
 import '../routers/routers.dart';

lib/components/markdown.dart

@@ -1,7 +1,8 @@
 import 'package:flutter_markdown/flutter_markdown.dart' as md;
-import 'package:flutter_go/utils/high_light_code.dart';
 import 'package:flutter/material.dart';
 
+import 'package:flutter_go/utils/high_light_code.dart';
+
 /// 使用方法
 /// MarkdownBody(markdown)
 final hightlighter = new HighLight();

lib/components/pagination.dart

@@ -3,9 +3,10 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
+import 'package:url_launcher/url_launcher.dart';
+
 import './home_banner.dart';
 import '../model/story.dart';
-import 'package:url_launcher/url_launcher.dart';
 
 class Pagination extends StatelessWidget {
   static final String routeName = '/material/page-selector';

lib/components/search_input.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:meta/meta.dart';
 

lib/components/widget_demo.dart

@@ -1,9 +1,10 @@
-/**
- * @author Nealyang
- * 
- * 新widget详情页模板
- */
+/// @author Nealyang
+/// 新widget详情页模板
+
+import 'dart:core';
+
 import 'package:flutter/material.dart';
+
 import '../routers/application.dart';
 import '../routers/routers.dart';
 import '../components/markdown.dart';
@@ -11,7 +12,6 @@ import '../model/collection.dart';
 import '../widgets/index.dart';
 import '../event/event_bus.dart';
 import '../event/event_model.dart';
-import 'dart:core';
 
 class WidgetDemo extends StatefulWidget {
   final List<dynamic> contentList;

lib/components/widget_item.dart

@@ -1,7 +1,7 @@
-/**
- * @author 一凨
- */
+/// @author 一凨
+
 import 'package:flutter/material.dart';
+
 import 'package:flutter_go/utils/style.dart';
 import 'package:flutter_go/resources/widget_name_to_icon.dart';
 

lib/components/widget_item_container.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+
 import './widget_item.dart';
 import '../routers/application.dart';
 import '../widgets/index.dart';