refactor(conflict):

2025-06-02 07:47:08 +08:00 · 2019-02-01 12:54:05 +08:00
parent f55a285cb5 ccb5c9e428
commit c90cdb3cc1
189 changed files with 2675 additions and 964 deletions
--- a/lib/widgets/components/Bar/AppBar/demo.dart
+++ b/lib/widgets/components/Bar/AppBar/demo.dart
@ -30,8 +30,8 @@ class _AppBarLessDefaultComplex extends State with SingleTickerProviderStateMixi
  @override
  void initState() {
    super.initState();
-    _scrollViewController = new ScrollController();
-    _tabController = new TabController(vsync: this, length: 6);// 和下面的 TabBar.tabs 数量对应
+    _scrollViewController =  ScrollController();
+    _tabController =  TabController(vsync: this, length: 6);// 和下面的 TabBar.tabs 数量对应
  }

  @override
@ -46,26 +46,26 @@ class _AppBarLessDefaultComplex extends State with SingleTickerProviderStateMixi
    // 如果省略了 leading ，但 AppBar 在带有 Drawer 的 Scaffold 中，则会插入一个 button 以打开 Drawer。
    // 否则，如果最近的 Navigator 具有任何先前的 router ，则会插入BackButton。
    // 这种行为可以通过设置来关闭automaticallyImplyLeading 为false。在这种情况下，空的 leading widget 将导致 middle/title widget 拉伸开始。
-    return new SizedBox(
+    return  SizedBox(
      height: 500,
-      child:new AppBar( // 大量配置属性参考 SliverAppBar 示例
-        title: new Text('title'),
-        leading: new Icon(Icons.home),
+      child: AppBar( // 大量配置属性参考 SliverAppBar 示例
+        title:  Text('title'),
+        leading:  Icon(Icons.home),
        backgroundColor: Colors.amber[500],
        centerTitle: true,
        actions: <Widget>[
-          new IconButton(
-              icon: new Icon(Icons.add_alarm),
+           IconButton(
+              icon:  Icon(Icons.add_alarm),
              tooltip: 'Add Alarm',
              onPressed: () {
                // do nothing
              }),
-          new PopupMenuButton<String>(
+           PopupMenuButton<String>(
              itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
-                new PopupMenuItem<String>(
-                    value: "price", child: new Text('Sort by price')),
-                new PopupMenuItem<String>(
-                    value: "time", child: new Text('Sort by time')),
+                 PopupMenuItem<String>(
+                    value: "price", child:  Text('Sort by price')),
+                 PopupMenuItem<String>(
+                    value: "time", child:  Text('Sort by time')),
              ],
              onSelected: (String action) {
                switch (action) {
@ -78,16 +78,16 @@ class _AppBarLessDefaultComplex extends State with SingleTickerProviderStateMixi
                }
              })
        ],
-        bottom: new TabBar(
+        bottom:  TabBar(
          isScrollable: true,
          controller: _tabController,
          tabs: <Widget>[
-            new Tab(text: "Tabs 1"),
-            new Tab(text: "Tabs 2"),
-            new Tab(text: "Tabs 3"),
-            new Tab(text: "Tabs 4"),
-            new Tab(text: "Tabs 5"),
-            new Tab(text: "Tabs 6"),
+             Tab(text: "Tabs 1"),
+             Tab(text: "Tabs 2"),
+             Tab(text: "Tabs 3"),
+             Tab(text: "Tabs 4"),
+             Tab(text: "Tabs 5"),
+             Tab(text: "Tabs 6"),
          ],
        ),
      ),
@ -107,7 +107,7 @@ class AppBarLessDefaultSimple extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
-      return new SizedBox(
+      return  SizedBox(
          height: 200,
          child:AppBar(
            title: Text('My Fancy Dress'),
--- a/lib/widgets/components/Bar/AppBar/index.dart
+++ b/lib/widgets/components/Bar/AppBar/index.dart
@ -62,7 +62,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
@ -84,7 +84,7 @@ Widget allDomes(BuildContext context, _DemoState that) {
 * 带align的text
 * */
 Widget textAlignBar(String txt) {
-  return new Align(
+  return  Align(
      alignment: FractionalOffset.centerLeft,
      child: Column(
          children: <Widget>[
--- a/lib/widgets/components/Bar/BottomAppBar/demo.dart
+++ b/lib/widgets/components/Bar/BottomAppBar/demo.dart
@ -21,7 +21,7 @@ class AppBarLessDefaultSimple extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
-    return new SizedBox(
+    return  SizedBox(
      height: 100,
      child: Scaffold(
        //appBar: AppBar(title: const Text('Bottom App Bar')),
--- a/lib/widgets/components/Bar/BottomAppBar/index.dart
+++ b/lib/widgets/components/Bar/BottomAppBar/index.dart
@ -38,7 +38,7 @@ class _DemoState extends State<Demo> {
  Widget build(BuildContext context) {
    return WidgetDemo(
      title: 'BottomAppBar',
-      codeUrl: 'componentss/Bar/BottomAppBar/demo.dart',
+      codeUrl: 'components/Bar/BottomAppBar/demo.dart',
      contentList: [allDomes(context, this)],
      docUrl: 'https://docs.flutter.io/flutter/material/BottomAppBar-class.html',
    );
@ -52,7 +52,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
--- a/lib/widgets/components/Bar/ButtonBar/demo.dart
+++ b/lib/widgets/components/Bar/ButtonBar/demo.dart
@ -44,9 +44,9 @@ class ButtonBarLessDefault extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
-        margin: new EdgeInsets.symmetric(vertical: 0.0),
+        margin:  EdgeInsets.symmetric(vertical: 0.0),
        height: 100.0,
-        child: new Scrollbar(child:ListView(
+        child:  Scrollbar(child:ListView(
            scrollDirection: Axis.horizontal, // 水平listView
            children: <Widget>[
              ButtonBar(
--- a/lib/widgets/components/Bar/ButtonBar/index.dart
+++ b/lib/widgets/components/Bar/ButtonBar/index.dart
@ -55,7 +55,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
--- a/lib/widgets/components/Bar/FlexibleSpaceBar/index.dart
+++ b/lib/widgets/components/Bar/FlexibleSpaceBar/index.dart
@ -54,7 +54,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
--- a/lib/widgets/components/Bar/SliverAppBar/demo.dart
+++ b/lib/widgets/components/Bar/SliverAppBar/demo.dart
@ -44,9 +44,9 @@ class SliverAppBarLessDefault extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    for (int i = 0; i < 20; i++) {
-      listData.add(new ListItem("我是测试标题$i", Icons.cake));
+      listData.add( ListItem("我是测试标题$i", Icons.cake));
    }
-    return new SizedBox(
+    return  SizedBox(
        height: 500.0,
        child: NestedScrollView(
          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
@ -89,7 +89,7 @@ class SliverAppBarLessDefault extends StatelessWidget {
  //            SliverPersistentHeader(
  //                delegate: _SliverAppBarDelegate(
  //                  TabBar(
-  //                    controller: new TabController(length: 2, vsync: this),
+  //                    controller:  TabController(length: 2, vsync: this),
  //                    labelColor: Colors.black87,
  //                    unselectedLabelColor: Colors.grey,
  //                    tabs: [
@ -101,10 +101,10 @@ class SliverAppBarLessDefault extends StatelessWidget {
            ];
        },
      body: Center(
-        child: new ListView.builder(
+        child:  ListView.builder(
          shrinkWrap: true,
          itemBuilder: (BuildContext context, int index) {
-            return new ListItemWidget(listData[index]);
+            return  ListItemWidget(listData[index]);
          },
          itemCount: listData.length,
        ),
@ -127,10 +127,10 @@ class ListItemWidget extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
-    return new InkWell(
-      child: new ListTile(
-        leading: new Icon(listItem.iconData),
-        title: new Text(listItem.title),
+    return  InkWell(
+      child:  ListTile(
+        leading:  Icon(listItem.iconData),
+        title:  Text(listItem.title),
      ),
      onTap: () {},
    );
--- a/lib/widgets/components/Bar/SliverAppBar/index.dart
+++ b/lib/widgets/components/Bar/SliverAppBar/index.dart
@ -40,7 +40,7 @@ class _DemoState extends State<Demo> {
  Widget build(BuildContext context) {
    return WidgetDemo(
      title: 'SliverAppBar',
-      codeUrl: 'componentss/Bar/SliverAppBar/demo.dart',
+      codeUrl: 'components/Bar/SliverAppBar/demo.dart',
      contentList:[allDomes(context, this)],
      docUrl: 'https://docs.flutter.io/flutter/widgets/SliverAppBar-class.html',
    );
@ -54,7 +54,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
@ -71,7 +71,7 @@ Widget allDomes(BuildContext context, _DemoState that) {
 * 带align的text
 * */
 Widget textAlignBar(String txt) {
-  return new Align(
+  return  Align(
      alignment: FractionalOffset.centerLeft,
      child: Column(
          children: <Widget>[
--- a/lib/widgets/components/Bar/SnackBar/demo.dart
+++ b/lib/widgets/components/Bar/SnackBar/demo.dart
@ -23,15 +23,15 @@ class SnackBarLessDefault extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // 当BuildContext在Scaffold之前时，调用Scaffold.of(context)会报错。这时可以通过Builder Widget来解决
-    return new Center(
-        child: new Column(
+    return  Center(
+        child:  Column(
          children: <Widget>[
-            new GestureDetector(
+             GestureDetector(
              onTap: () {
-                final snackBar = new SnackBar(
-                  content: new Text('这是一个SnackBar, 右侧有SnackBarAction'),
+                final snackBar =  SnackBar(
+                  content:  Text('这是一个SnackBar, 右侧有SnackBarAction'),
                  backgroundColor:Colors.red,
-                  action: new SnackBarAction( // 提示信息上添加一个撤消的按钮
+                  action:  SnackBarAction( // 提示信息上添加一个撤消的按钮
                    textColor:Colors.black,
                    label: '撤消',
                    onPressed: () {
@ -43,19 +43,19 @@ class SnackBarLessDefault extends StatelessWidget {
                );
                Scaffold.of(context).showSnackBar(snackBar);
              },
-              child: new Text('显示SnackBar'),
+              child:  Text('显示SnackBar'),
            ),
-            new GestureDetector(
+             GestureDetector(
              onTap: () {
-                final snackBar = new SnackBar(
-                  content: new Text('右侧无SnackBarAction'),
+                final snackBar =  SnackBar(
+                  content:  Text('右侧无SnackBarAction'),
                  backgroundColor:Colors.red,
                  duration:Duration(minutes: 1),// 持续时间
                  //animation,
                );
                Scaffold.of(context).showSnackBar(snackBar);
              },
-              child: new Text('显示无SnackBarAction的SnackBar'),
+              child:  Text('显示无SnackBarAction的SnackBar'),
            ),
          ],
        )
--- a/lib/widgets/components/Bar/SnackBar/index.dart
+++ b/lib/widgets/components/Bar/SnackBar/index.dart
@ -40,7 +40,7 @@ class _DemoState extends State<Demo> {
  Widget build(BuildContext context) {
    return WidgetDemo(
      title: 'SnackBar',
-      codeUrl: 'componentss/Bar/SnackBar/demo.dart',
+      codeUrl: 'components/Bar/SnackBar/demo.dart',
      contentList: [allDomes(context, this)],
      docUrl: 'https://docs.flutter.io/flutter/material/SnackBar-class.html',
    );
@ -54,7 +54,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
@ -72,7 +72,7 @@ Widget allDomes(BuildContext context, _DemoState that) {
 * 带align的text
 * */
 Widget textAlignBar(String txt) {
-  return new Align(
+  return  Align(
      alignment: FractionalOffset.centerLeft,
      child: Column(
          children: <Widget>[
--- a/lib/widgets/components/Bar/SnackBarAction/demo.dart
+++ b/lib/widgets/components/Bar/SnackBarAction/demo.dart
@ -16,15 +16,15 @@ class SnackBarActionDemo extends StatefulWidget {

 class _Demo extends State<SnackBarActionDemo> {
  Widget build(BuildContext context) {
-      return new Center(
-        child: new Column(
+      return  Center(
+        child:  Column(
          children: <Widget>[
            new RaisedButton(
              onPressed: () {
                final snackBar = new SnackBar(
                  content: new Text('这是一个SnackBar, 右侧有SnackBarAction, 3秒后消失'),
                  backgroundColor:Color(0xffc91b3a),
-                  action: new SnackBarAction( // 提示信息上添加一个撤消的按钮
+                  action:  SnackBarAction( // 提示信息上添加一个撤消的按钮
                    textColor:Colors.white,
                    label: '撤消',
                    onPressed: () {
@ -37,7 +37,7 @@ class _Demo extends State<SnackBarActionDemo> {
                Scaffold.of(context).showSnackBar(snackBar);
              },
             
-              child: new Text('点我显示有action的SnackBar'),
+              child:  Text('点我显示有action的SnackBar'),
            ),
            new RaisedButton(
              onPressed: () async {
@ -49,7 +49,7 @@ class _Demo extends State<SnackBarActionDemo> {
                );
                Scaffold.of(context).showSnackBar(snackBar);
              },
-              child: new Text('点我显示无SnackBarAction的SnackBar'),
+              child:  Text('点我显示无SnackBarAction的SnackBar'),
            ),
          ],
        )
--- a/lib/widgets/components/Bar/TabBar/demo.dart
+++ b/lib/widgets/components/Bar/TabBar/demo.dart
@ -26,8 +26,8 @@ class _TabBarDemo extends State with SingleTickerProviderStateMixin {
  @override
  void initState() {
    super.initState();
-    _scrollViewController = new ScrollController();
-    _tabController = new TabController(vsync: this, length: 6);// 和下面的 TabBar.tabs 数量对应
+    _scrollViewController =  ScrollController();
+    _tabController =  TabController(vsync: this, length: 6);// 和下面的 TabBar.tabs 数量对应
  }

  @override
@ -42,27 +42,27 @@ class _TabBarDemo extends State with SingleTickerProviderStateMixin {
    // 如果省略了 leading ，但 AppBar 在带有 Drawer 的 Scaffold 中，则会插入一个 button 以打开 Drawer。
    // 否则，如果最近的 Navigator 具有任何先前的 router ，则会插入BackButton。
    // 这种行为可以通过设置来关闭automaticallyImplyLeading 为false。在这种情况下，空的 leading widget 将导致 middle/title widget 拉伸开始。
-    return new SizedBox(
+    return  SizedBox(
      height: 500,
-      child:new Scaffold(
-        appBar: new AppBar( // 大量配置属性参考 SliverAppBar 示例
-          title: new Text('TabBar'),
-          leading: new Icon(Icons.home),
+      child: Scaffold(
+        appBar:  AppBar( // 大量配置属性参考 SliverAppBar 示例
+          title:  Text('TabBar'),
+          leading:  Icon(Icons.home),
          backgroundColor: Colors.amber[1000],
-          bottom: new TabBar(
+          bottom:  TabBar(
            isScrollable: true,
            controller: _tabController,
            tabs: <Widget>[
-              new Tab(text: "Tabs 1"),
-              new Tab(text: "Tabs 2"),
-              new Tab(text: "Tabs 3"),
-              new Tab(text: "Tabs 4"),
-              new Tab(text: "Tabs 5"),
-              new Tab(text: "Tabs 6"),
+               Tab(text: "Tabs 1"),
+               Tab(text: "Tabs 2"),
+               Tab(text: "Tabs 3"),
+               Tab(text: "Tabs 4"),
+               Tab(text: "Tabs 5"),
+               Tab(text: "Tabs 6"),
            ],
          ),
        ),
-        body: new TabBarView(controller: _tabController, children: <Widget>[
+        body:  TabBarView(controller: _tabController, children: <Widget>[
          Text('TabsView 1'),
          Text('TabsView 2'),
          Text('TabsView 3'),
--- a/lib/widgets/components/Card/Card/demo.dart
+++ b/lib/widgets/components/Card/Card/demo.dart
@ -50,9 +50,9 @@ class CardLessDefault extends StatelessWidget {
      margin:EdgeInsets.all(20.0),
      //  margin: EdgeInsetsDirectional.only(bottom: 30.0, top: 30.0, start: 30.0),// 边距
      semanticContainer:true, // 表示单个语义容器，还是false表示单个语义节点的集合，接受单个child，但该child可以是Row，Column或其他包含子级列表的widget
-//      shape:new Border.all(
+//      shape: Border.all(
 //          color: Colors.indigo, width: 1.0, style: BorderStyle.solid), // 卡片材质的形状，以及边框
-      shape:RoundedRectangleBorder(borderRadius: new BorderRadius.circular(20.0)), // 圆角
+      shape:RoundedRectangleBorder(borderRadius:  BorderRadius.circular(20.0)), // 圆角
      //borderRadius: BorderRadius.all(Radius.circular(8.0)),
      child: Column( //card里面的子控件
        mainAxisSize: MainAxisSize.min,
--- a/lib/widgets/components/Card/Card/index.dart
+++ b/lib/widgets/components/Card/Card/index.dart
@ -52,7 +52,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDomes(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
--- a/lib/widgets/components/Chip/InputChip/demo.dart
+++ b/lib/widgets/components/Chip/InputChip/demo.dart
--- a/lib/widgets/components/Chip/InputChip/index.dart
+++ b/lib/widgets/components/Chip/InputChip/index.dart
--- a/lib/widgets/components/Dialog/AboutDialog/demo.dart
+++ b/lib/widgets/components/Dialog/AboutDialog/demo.dart
@ -19,9 +19,9 @@ class _Demo extends State<AboutDialogDemo> {
  void showAlertDialog(BuildContext context) {
    showDialog(
        context: context,
-        builder: (_) => new AboutDialog(
+        builder: (_) =>  AboutDialog(
          applicationName: '名称',
-          applicationIcon: new Icon(Icons.ac_unit),
+          applicationIcon:  Icon(Icons.ac_unit),
          applicationVersion: 'V1.0',
          children: <Widget>[
            Text('我是一个关于的dialog')
@ -29,12 +29,12 @@ class _Demo extends State<AboutDialogDemo> {
        ));
  }
  Widget build(BuildContext context) {
-    return new RaisedButton(
-        padding: new EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
+    return  RaisedButton(
+        padding:  EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
        //padding
-        child: new Text(
+        child:  Text(
          'show aboutDialog',
-          style: new TextStyle(
+          style:  TextStyle(
            fontSize: 18.0, //textsize
            color: Colors.white, // textcolor
          ),
--- a/lib/widgets/components/Dialog/AlertDialog/demo.dart
+++ b/lib/widgets/components/Dialog/AlertDialog/demo.dart
@ -10,12 +10,9 @@
 import 'package:flutter/material.dart';


-class AlertDialogDemo extends StatefulWidget {
-  _Demo createState() => _Demo();
-}
+class AlertDialogDemo extends StatelessWidget{
+  // _Demo createState() => _Demo();

-class _Demo extends State<AlertDialogDemo> {
-  
  void showAlertDialog(BuildContext context) {
    showDialog<void>(
      context: context,
@ -122,12 +119,12 @@ class _Demo extends State<AlertDialogDemo> {
    );
  }
  Widget build(BuildContext context) {
-    return new RaisedButton(
-        padding: new EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
+    return  RaisedButton(
+        padding:  EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
        //padding
-        child: new Text(
+        child:  Text(
          '点我显示 AlertDialog',
-          style: new TextStyle(
+          style:  TextStyle(
            fontSize: 18.0, //textsize
            color: Colors.white, // textcolor
          ),
@ -141,3 +138,8 @@ class _Demo extends State<AlertDialogDemo> {
      });
  }
 }
+
+// class _Demo extends State<AlertDialogDemo> {
+  
+  
+// }
--- a/lib/widgets/components/Dialog/Dialog/demo.dart
+++ b/lib/widgets/components/Dialog/Dialog/demo.dart
@ -42,12 +42,12 @@ class _Demo extends State<DialogDemo> {
    );
  }
  Widget build(BuildContext context) {
-    return new RaisedButton(
-        padding: new EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
+    return  RaisedButton(
+        padding:  EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
        //padding
-        child: new Text(
+        child:  Text(
          '点我显示 Dialog',
-          style: new TextStyle(
+          style:  TextStyle(
            fontSize: 18.0, //textsize
            color: Colors.white, // textcolor
          ),
@ -108,14 +108,14 @@ class _DialogMoreDemo extends State<DialogMoreDemo> {
    );
  }
  Widget build(BuildContext context) {
-    return new Column(
+    return  Column(
      children: <Widget>[
-        new RaisedButton(
-          padding: new EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
+         RaisedButton(
+          padding:  EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
          //padding
-          child: new Text(
+          child:  Text(
          '点我显示Dialog',
-          style: new TextStyle(
+          style:  TextStyle(
            fontSize: 18.0, //textsize
            color: Colors.white, // textcolor
          ),
--- a/lib/widgets/components/Dialog/SimpleDialog/demo.dart
+++ b/lib/widgets/components/Dialog/SimpleDialog/demo.dart
@ -20,17 +20,17 @@ class _Demo extends State<SimpleDialogDemo> {
    showDialog<Null>(
      context: context,
      builder: (BuildContext context) {
-        return new SimpleDialog(
-          title: new Text('选择'),
+        return  SimpleDialog(
+          title:  Text('选择'),
          children: <Widget>[
-            new SimpleDialogOption(
-              child: new Text('选项 1'),
+             SimpleDialogOption(
+              child:  Text('选项 1'),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
-            new SimpleDialogOption(
-              child: new Text('选项 2'),
+             SimpleDialogOption(
+              child:  Text('选项 2'),
              onPressed: () {
                Navigator.of(context).pop();
              },
@ -41,12 +41,12 @@ class _Demo extends State<SimpleDialogDemo> {
    );
  }
  Widget build(BuildContext context) {
-    return new RaisedButton(
-        padding: new EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
+    return  RaisedButton(
+        padding:  EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0),
        //padding
-        child: new Text(
+        child:  Text(
          'show SimpleDialog',
-          style: new TextStyle(
+          style:  TextStyle(
            fontSize: 18.0, //textsize
            color: Colors.white, // textcolor
          ),
--- a/lib/widgets/components/Grid/GridPaper/demo.dart
+++ b/lib/widgets/components/Grid/GridPaper/demo.dart
@ -21,7 +21,7 @@ class _Demo extends State<GridPaperDemo> {
    return Container(
      height: 400,
      color: Color(0xffc91b3a),
-      child:  new GridView.count(
+      child:   GridView.count(
          crossAxisCount: 2,
          mainAxisSpacing: 10.0,
          crossAxisSpacing: 4.0,
@ -40,21 +40,21 @@ class _Demo extends State<GridPaperDemo> {
          ),
          GridPaper(
            color: Colors.red,
-            child: new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+            child:  Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
          ),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
        ],
      )
    );
--- a/lib/widgets/components/Grid/GridTile/demo.dart
+++ b/lib/widgets/components/Grid/GridTile/demo.dart
@ -21,7 +21,7 @@ class _Demo extends State<GridTileDemo> {
    return Container(
      height: 400,
      color: Color(0xffc91b3a),
-      child:  new GridView.count(
+      child:   GridView.count(
          crossAxisCount: 2,
          mainAxisSpacing: 10.0,
          crossAxisSpacing: 4.0,
@ -36,21 +36,21 @@ class _Demo extends State<GridTileDemo> {
            ),
            footer: Text("GridTile footer", style: TextStyle(color: Colors.white)),
          ),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
        ],
      )
    );
--- a/lib/widgets/components/Grid/GridTileBar/demo.dart
+++ b/lib/widgets/components/Grid/GridTileBar/demo.dart
@ -21,7 +21,7 @@ class _Demo extends State<GridTileDemo> {
    return Container(
      height: 400,
      color: Color(0xffc91b3a),
-      child:  new GridView.count(
+      child:   GridView.count(
          crossAxisCount: 2,
          mainAxisSpacing: 10.0,
          crossAxisSpacing: 4.0,
@ -38,21 +38,21 @@ class _Demo extends State<GridTileDemo> {
            child: Container(),

          ),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
        ],
      )
    );
--- a/lib/widgets/components/Grid/GridView/demo.dart
+++ b/lib/widgets/components/Grid/GridView/demo.dart
@ -21,7 +21,7 @@ class _Demo extends State<GridTileDemo> {
    return Container(
      height: 400,
      color: Color(0xffc91b3a),
-      child:  new GridView.count(
+      child:   GridView.count(
          crossAxisCount: 2,
          mainAxisSpacing: 10.0,
          crossAxisSpacing: 4.0,
@ -38,21 +38,21 @@ class _Demo extends State<GridTileDemo> {
            child: Container(),

          ),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
-          new Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
+           Image.network('https://flutter.io/assets/homepage/news-2-599aefd56e8aa903ded69500ef4102cdd8f988dab8d9e4d570de18bdb702ffd4.png', scale: 1, fit: BoxFit.cover),
        ],
      )
    );
--- a/lib/widgets/components/Grid/SliverGrid/demo.dart
+++ b/lib/widgets/components/Grid/SliverGrid/demo.dart
@ -17,34 +17,34 @@ class SliverGridDemo extends StatefulWidget {
 class _Demo extends State<SliverGridDemo> {

  Widget showCustomScrollView() {
-    return new CustomScrollView(
+    return  CustomScrollView(
      slivers: <Widget>[
-        new SliverGrid(
-          gridDelegate: new SliverGridDelegateWithMaxCrossAxisExtent(
+         SliverGrid(
+          gridDelegate:  SliverGridDelegateWithMaxCrossAxisExtent(
            maxCrossAxisExtent: 200.0,
            mainAxisSpacing: 10.0,
            crossAxisSpacing: 10.0,
            childAspectRatio: 4.0,
          ),
-          delegate: new SliverChildBuilderDelegate(
+          delegate:  SliverChildBuilderDelegate(
                (BuildContext context, int index) {
-              return new Container(
+              return  Container(
                alignment: Alignment.center,
                color: Colors.cyan[100 * (index % 5)],
-                child: new Text('grid item $index'),
+                child:  Text('grid item $index'),
              );
            },
            childCount: 20,
          ),
        ),
-//        new SliverFixedExtentList(
+//         SliverFixedExtentList(
 //          itemExtent: 100.0,
-//          delegate: new SliverChildBuilderDelegate(
+//          delegate:  SliverChildBuilderDelegate(
 //                (BuildContext context, int index) {
-//              return new Container(
+//              return  Container(
 //                alignment: Alignment.center,
 //                color: Colors.lightBlue[100 * (index % 9)],
-//                child: new Text('list item $index'),
+//                child:  Text('list item $index'),
 //              );
 //            },
 //          ),
--- a/lib/widgets/components/Grid/SliverGrid/index.dart
+++ b/lib/widgets/components/Grid/SliverGrid/index.dart
@ -40,7 +40,7 @@ class _DemoState extends State<Demo> {
  Widget build(BuildContext context) {
    return WidgetDemo(
      title: 'SliverGrid',
-      codeUrl: 'components/Grid/GridPaper/demo.dart',
+      codeUrl: 'components/Grid/SliverGrid/demo.dart',
      contentList: [
        _Text0,
        SliverGridDemo(),
--- a/lib/widgets/components/List/AnimatedList/demo.dart
+++ b/lib/widgets/components/List/AnimatedList/demo.dart
@ -1,7 +1,7 @@


 import 'package:flutter/material.dart';
-import 'package:flutter_go/widgets/components/LIst/AnimatedList/model.dart';
+import 'package:flutter_go/widgets/components/List/AnimatedList/model.dart';

 class AnimatedListFullDefault extends StatefulWidget {
  AnimatedListFullDefault({Key key, this.parent}) : super(key: key);
@ -15,7 +15,7 @@ class AnimatedListFullDefault extends StatefulWidget {
 * AnimatedList 默认的实例,有状态
 * */
 class _AnimatedListFullDefault extends State<AnimatedListFullDefault> {
-  final GlobalKey<AnimatedListState> _listKey = new GlobalKey<AnimatedListState>();
+  final GlobalKey<AnimatedListState> _listKey =  GlobalKey<AnimatedListState>();
  ListModel<int> _list;
  int _selectedItem;
  int _nextItem; // The next item inserted when the user presses the '+' button.
@ -26,7 +26,7 @@ class _AnimatedListFullDefault extends State<AnimatedListFullDefault> {
    if (widget.parent is State) {
      widget.parent.animatedList = this; // 修改父级的对象引用
    }
-    _list = new ListModel<int>(
+    _list =  ListModel<int>(
      listKey: _listKey,
      initialItems: <int>[0, 1, 2],
      removedItemBuilder: _buildRemovedItem,
@ -50,7 +50,7 @@ class _AnimatedListFullDefault extends State<AnimatedListFullDefault> {
  }

  Widget _buildItem(BuildContext context, int index, Animation<double> animation) {
-    return new CardItem(
+    return  CardItem(
      animation: animation,
      item: _list[index],
      selected: _selectedItem == _list[index],
@ -63,7 +63,7 @@ class _AnimatedListFullDefault extends State<AnimatedListFullDefault> {
  }

  Widget _buildRemovedItem(int item, BuildContext context, Animation<double> animation) {
-    return new CardItem(
+    return  CardItem(
      animation: animation,
      item: item,
      selected: false,
@ -107,20 +107,20 @@ class CardItem extends StatelessWidget {
    TextStyle textStyle = Theme.of(context).textTheme.display1;
    if (selected)
      textStyle = textStyle.copyWith(color: Colors.lightGreenAccent[400]);
-    return new Padding(
+    return  Padding(
      padding: const EdgeInsets.all(2.0),
-      child: new SizeTransition(
+      child:  SizeTransition(
        axis: Axis.vertical,
        sizeFactor: animation,
-        child: new GestureDetector(
+        child:  GestureDetector(
          behavior: HitTestBehavior.opaque,
          onTap: onTap,
-          child: new SizedBox(
+          child:  SizedBox(
            height: 128.0,
-            child: new Card(
+            child:  Card(
              color: Colors.primaries[item % Colors.primaries.length],
-              child: new Center(
-                child: new Text('Item $item', style: textStyle),
+              child:  Center(
+                child:  Text('Item $item', style: textStyle),
              ),
            ),
          ),
--- a/lib/widgets/components/List/AnimatedList/index.dart
+++ b/lib/widgets/components/List/AnimatedList/index.dart
@ -32,7 +32,7 @@ const String _Text1 =


 class Demo extends StatefulWidget {
-  static const String routeName = '/components//List/AnimatedList';
+  static const String routeName = '/components/List/AnimatedList';

  @override
  _DemoState createState() => _DemoState();
@ -58,7 +58,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDemoBoxs(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
--- a/lib/widgets/components/List/AnimatedList/model.dart
+++ b/lib/widgets/components/List/AnimatedList/model.dart
@ -25,7 +25,7 @@ class ListModel<E> {
    Iterable<E> initialItems,
  }) : assert(listKey != null),
        assert(removedItemBuilder != null),
-        _items = new List<E>.from(initialItems ?? <E>[]);
+        _items =  List<E>.from(initialItems ?? <E>[]);

  final GlobalKey<AnimatedListState> listKey;
  final dynamic removedItemBuilder;
--- a/lib/widgets/components/List/ListBody/demo.dart
+++ b/lib/widgets/components/List/ListBody/demo.dart
--- a/lib/widgets/components/List/ListBody/index.dart
+++ b/lib/widgets/components/List/ListBody/index.dart
@ -55,7 +55,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allCheckboxs(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
--- a/lib/widgets/components/List/ListView/demo.dart
+++ b/lib/widgets/components/List/ListView/demo.dart
--- a/lib/widgets/components/List/ListView/index.dart
+++ b/lib/widgets/components/List/ListView/index.dart
@ -67,7 +67,7 @@ class _DemoState extends State<Demo> {
  Widget build(BuildContext context) {
    return WidgetDemo(
      title: 'ListView',
-      codeUrl: '/componentss/List/ListView/demo.dart',
+      codeUrl: 'components/List/ListView/demo.dart',
      contentList: [allCheckboxs(context, this)],
      docUrl: 'https://docs.flutter.io/flutter/widgets/ListView-class.html',
    );
@ -81,7 +81,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allCheckboxs(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
@ -107,7 +107,7 @@ Widget allCheckboxs(BuildContext context, _DemoState that) {
 * 带align的text
 * */
 Widget textAlignBar(String txt) {
-  return new Align(
+  return  Align(
      alignment: FractionalOffset.centerLeft,
      child: Column(
          children: <Widget>[
--- a/lib/widgets/components/List/index.dart
+++ b/lib/widgets/components/List/index.dart
--- a/lib/widgets/components/Menu/CheckedPopupMenuItem/demo.dart
+++ b/lib/widgets/components/Menu/CheckedPopupMenuItem/demo.dart
@ -36,8 +36,8 @@ class _CheckedPopupMenuItemDemoState extends State<CheckedPopupMenuItemDemo> {
      _checkedValues.add(value);
    }
   
-    Scaffold.of(context).showSnackBar(new SnackBar(
-                content: new Text('Checked $_checkedValues')));
+    Scaffold.of(context).showSnackBar( SnackBar(
+                content:  Text('Checked $_checkedValues')));
  }

  @override
--- a/lib/widgets/components/Menu/PopupMenuButton/demo.dart
+++ b/lib/widgets/components/Menu/PopupMenuButton/demo.dart
@ -19,8 +19,8 @@ class _PopupMenuButtonDemoState extends State<PopupMenuButtonDemo> {
  void showMenuSelection(String value) {
    if (<String>[_simpleValue1, _simpleValue2, _simpleValue3].contains(value))
      _simpleValue = value;
-       Scaffold.of(context).showSnackBar(new SnackBar(
-                content: new Text('You selected: $value')));
+       Scaffold.of(context).showSnackBar( SnackBar(
+                content:  Text('You selected: $value')));
  }


--- a/lib/widgets/components/Menu/PopupMenuDivider/demo.dart
+++ b/lib/widgets/components/Menu/PopupMenuDivider/demo.dart
@ -13,7 +13,7 @@ class PopupMenuDividerDemo extends StatefulWidget {
 class _PopupMenuDividerDemoState extends State<PopupMenuDividerDemo> {
  void showInSnackBar(String value) {
    Scaffold.of(context)
-        .showSnackBar(new SnackBar(content: new Text('You selected: $value')));
+        .showSnackBar( SnackBar(content:  Text('You selected: $value')));
  }

  @override
--- a/lib/widgets/components/Menu/PopupMenuDivider/index.dart
+++ b/lib/widgets/components/Menu/PopupMenuDivider/index.dart
@ -18,7 +18,7 @@ const String content0 = '''
 const String content1 = '''
 ### **基本用法**
 > 此widget通过调整Divider widget 来适应于弹出菜单中
- 在 PopupMenuButton 中直接 new PopupMenuDivider() 即可
+- 在 PopupMenuButton 中直接  PopupMenuDivider() 即可
 ''';

 class Demo extends StatefulWidget {
--- a/lib/widgets/components/Menu/PopupMenuEntry/index.dart
+++ b/lib/widgets/components/Menu/PopupMenuEntry/index.dart
@ -34,7 +34,7 @@ class _DemoState extends State<Demo> {
        PopupMenuDividerDemo()
      ],
      docUrl: 'https://docs.flutter.io/flutter/material/PopupMenuEntry-class.html',
-      codeUrl: 'components/Menu/PopupMenuEntry/demo.dart',
+      codeUrl: 'components/Menu/PopupMenuDivider/demo.dart',
      title: 'PopupMenuEntry',
    );
  }
--- a/lib/widgets/components/Menu/PopupMenuItem/index.dart
+++ b/lib/widgets/components/Menu/PopupMenuItem/index.dart
@ -34,7 +34,7 @@ class _DemoState extends State<Demo> {
        PopupMenuDividerDemo()
      ],
      docUrl: "https://docs.flutter.io/flutter/material/PopupMenuItem-class.html",
-      codeUrl: 'components/Menu/PopupMenuEntry/demo.dart',
+      codeUrl: 'components/Menu/PopupMenuDivider/demo.dart',
      title: 'PopupMenuItem',
    );
  }
--- a/lib/widgets/components/Navigation/BottomNavigationBar/demo.dart
+++ b/lib/widgets/components/Navigation/BottomNavigationBar/demo.dart
@ -40,17 +40,17 @@ class _BottomNavigationBarFullDefault extends State {
      fixedColor: Colors.deepPurple, // 如果 type 类型为 fixed，则通过 fixedColor 设置选中 item 的颜色
      items: <BottomNavigationBarItem> [
        BottomNavigationBarItem(
-            title: new Text("Home"), icon: new Icon(Icons.home)),
+            title:  Text("Home"), icon:  Icon(Icons.home)),
        BottomNavigationBarItem(
-            title: new Text("List"), icon: new Icon(Icons.list)),
+            title:  Text("List"), icon:  Icon(Icons.list)),
        BottomNavigationBarItem(
-            title: new Text("Message"), icon: new Icon(Icons.message)),
+            title:  Text("Message"), icon:  Icon(Icons.message)),
        BottomNavigationBarItem(
-            title: new Text("add"), icon: new Icon(Icons.add)),
+            title:  Text("add"), icon:  Icon(Icons.add)),
        BottomNavigationBarItem(
-            title: new Text("menu"), icon: new Icon(Icons.menu)),
+            title:  Text("menu"), icon:  Icon(Icons.menu)),
        BottomNavigationBarItem(
-            title: new Text("other"), icon: new Icon(Icons.devices_other)),
+            title:  Text("other"), icon:  Icon(Icons.devices_other)),

      ],
    );
--- a/lib/widgets/components/Navigation/BottomNavigationBar/index.dart
+++ b/lib/widgets/components/Navigation/BottomNavigationBar/index.dart
@ -57,7 +57,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allDemoBoxs(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
@ -79,7 +79,7 @@ Widget allDemoBoxs(BuildContext context, _DemoState that) {
 * 带align的text
 * */
 Widget textAlignBar(String txt) {
-  return new Align(
+  return  Align(
      alignment: FractionalOffset.centerLeft,
      child: Column(
          children: <Widget>[
--- a/lib/widgets/components/Navigation/BottomNavigationBarItem/demo.dart
+++ b/lib/widgets/components/Navigation/BottomNavigationBarItem/demo.dart
@ -21,20 +21,20 @@ class BottomNavigationBarItemLessDefault extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
-    return new SizedBox(
+    return  SizedBox(
        height: 100,
        child: Scaffold(
-          bottomNavigationBar: new BottomNavigationBar(items: [
-            new BottomNavigationBarItem(
-                icon: new Icon(Icons.laptop_chromebook),
-                title: new Text("主页"),
+          bottomNavigationBar:  BottomNavigationBar(items: [
+             BottomNavigationBarItem(
+                icon:  Icon(Icons.laptop_chromebook),
+                title:  Text("主页"),
                backgroundColor: Colors.red
            ),
-            new BottomNavigationBarItem(
-                icon: new Icon(Icons.list), title: new Text("分类"),backgroundColor: Colors.grey),
-            new BottomNavigationBarItem(
-                icon: new Icon(Icons.local_grocery_store), title: new Text("购物车")),
-            new BottomNavigationBarItem(icon: new Icon(Icons.person), title: new Text("我的"))
+             BottomNavigationBarItem(
+                icon:  Icon(Icons.list), title:  Text("分类"),backgroundColor: Colors.grey),
+             BottomNavigationBarItem(
+                icon:  Icon(Icons.local_grocery_store), title:  Text("购物车")),
+             BottomNavigationBarItem(icon:  Icon(Icons.person), title:  Text("我的"))
          ],
            //onTap: onTap,
            //currentIndex: page
@ -46,13 +46,13 @@ class BottomNavigationBarItemLessDefault extends StatelessWidget {

 //backgroundColor: Colors.grey,
 //
-////      body: new PageView(
+////      body:  PageView(
 ////
 ////          children: [
-////            new Index(),
-////            new Classify(),
-////            new Shopping(),
-////            new Myself()
+////             Index(),
+////             Classify(),
+////             Shopping(),
+////             Myself()
 ////          ],
 ////
 ////          controller: pageController,
--- a/lib/widgets/components/Navigation/BottomNavigationBarItem/index.dart
+++ b/lib/widgets/components/Navigation/BottomNavigationBarItem/index.dart
@ -52,7 +52,7 @@ class _DemoState extends State<Demo> {
 */
 Widget allCheckboxs(BuildContext context, _DemoState that) {
  return Container(
-    //padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
+    //padding:  EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
      child: Column(
        //mainAxisSize: MainAxisSize.max,
          children: <Widget>[
@ -70,7 +70,7 @@ Widget allCheckboxs(BuildContext context, _DemoState that) {
 * 带align的text
 * */
 Widget textAlignBar(String txt) {
-  return new Align(
+  return  Align(
      alignment: FractionalOffset.centerLeft,
      child: Column(
          children: <Widget>[
--- a/lib/widgets/components/Pick/DayPicker/demo.dart
+++ b/lib/widgets/components/Pick/DayPicker/demo.dart
@ -14,8 +14,8 @@ class DayPickerDemo extends StatefulWidget {
 }

 class _DayPickerState extends State<DayPickerDemo> {
-  DateTime _date = new DateTime.now();
-  TimeOfDay _time = new TimeOfDay.now();
+  DateTime _date =  DateTime.now();
+  TimeOfDay _time =  TimeOfDay.now();

  Future<void> _selectDate(BuildContext context) async {
    final DateTime picked = await showDatePicker(
@ -29,7 +29,7 @@ class _DayPickerState extends State<DayPickerDemo> {
      _date = picked;
    });

-    if (picked == null) _date = new DateTime.now();
+    if (picked == null) _date =  DateTime.now();
  }

  Future<void> _selectTime(BuildContext context) async {
@ -40,23 +40,23 @@ class _DayPickerState extends State<DayPickerDemo> {
    setState(() {
      _time = picked;
    });
-    if (picked == null) _time = new TimeOfDay.now();
+    if (picked == null) _time =  TimeOfDay.now();
  }

  @override
  Widget build(BuildContext context) {
-    return new Column(
+    return  Column(
      children: <Widget>[
-        new Text('日期选择'),
-        new RaisedButton(
-          child: new Text('date selected:${_date.toString()}'),
+         Text('日期选择'),
+         RaisedButton(
+          child:  Text('date selected:${_date.toString()}'),
          onPressed: () {
            _selectDate(context);
          },
        ),
-        new Text('时间选择'),
-        new RaisedButton(
-          child: new Text('date selected:${_time.toString()}'),
+         Text('时间选择'),
+         RaisedButton(
+          child:  Text('date selected:${_time.toString()}'),
          onPressed: () {
            _selectTime(context);
          },
--- a/lib/widgets/components/Pick/MonthPicker/demo.dart
+++ b/lib/widgets/components/Pick/MonthPicker/demo.dart
@ -14,7 +14,7 @@ class MothPickerDemo extends StatefulWidget {
 }

 class _MothPickerState extends State<MothPickerDemo> {
-  DateTime _date = new DateTime.now();
+  DateTime _date =  DateTime.now();

  Future<void> _selectDate(BuildContext context) async {
    final DateTime picked = await showDatePicker(
@ -28,16 +28,16 @@ class _MothPickerState extends State<MothPickerDemo> {
      _date = picked;
    });

-    if (picked == null) _date = new DateTime.now();
+    if (picked == null) _date =  DateTime.now();
  }

  @override
  Widget build(BuildContext context) {
-    return new Column(
+    return  Column(
      children: <Widget>[
-        new Text('日期选择'),
-        new RaisedButton(
-          child: new Text('date selected:${_date.toString()}'),
+         Text('日期选择'),
+         RaisedButton(
+          child:  Text('date selected:${_date.toString()}'),
          onPressed: () {
            _selectDate(context);
          },
--- a/lib/widgets/components/Pick/ShowdatePicker/demo.dart
+++ b/lib/widgets/components/Pick/ShowdatePicker/demo.dart
@ -14,8 +14,8 @@ class ShowDatePickerDemo extends StatefulWidget {
 }

 class _ShowDatePickerState extends State<ShowDatePickerDemo> {
-  DateTime _date = new DateTime.now();
-  TimeOfDay _time = new TimeOfDay.now();
+  DateTime _date =  DateTime.now();
+  TimeOfDay _time =  TimeOfDay.now();

  Future<void> _selectDate(BuildContext context) async {
    final DateTime picked = await showDatePicker(
@ -29,7 +29,7 @@ class _ShowDatePickerState extends State<ShowDatePickerDemo> {
      _date = picked;
    });

-    if (picked == null) _date = new DateTime.now();
+    if (picked == null) _date =  DateTime.now();
  }

  Future<void> _selectTime(BuildContext context) async {
@ -40,23 +40,23 @@ class _ShowDatePickerState extends State<ShowDatePickerDemo> {
    setState(() {
      _time = picked;
    });
-    if (picked == null) _time = new TimeOfDay.now();
+    if (picked == null) _time =  TimeOfDay.now();
  }

  @override
  Widget build(BuildContext context) {
-    return new Column(
+    return  Column(
      children: <Widget>[
-        new Text('日期选择'),
-        new RaisedButton(
-          child: new Text('date selected:${_date.toString()}'),
+         Text('日期选择'),
+         RaisedButton(
+          child:  Text('date selected:${_date.toString()}'),
          onPressed: () {
            _selectDate(context);
          },
        ),
-        new Text('时间选择'),
-        new RaisedButton(
-          child: new Text('date selected:${_time.toString()}'),
+         Text('时间选择'),
+         RaisedButton(
+          child:  Text('date selected:${_time.toString()}'),
          onPressed: () {
            _selectTime(context);
          },
--- a/lib/widgets/components/Pick/YearPicker/demo.dart
+++ b/lib/widgets/components/Pick/YearPicker/demo.dart
@ -14,7 +14,7 @@ class YearPickerDemo extends StatefulWidget {
 }

 class _YearPickerDemoState extends State<YearPickerDemo> {
-  DateTime _date = new DateTime.now();
+  DateTime _date =  DateTime.now();

  Future<void> _selectDate(BuildContext context) async {
    final DateTime picked = await showDatePicker(
@ -28,16 +28,16 @@ class _YearPickerDemoState extends State<YearPickerDemo> {
      _date = picked;
    });

-    if (picked == null) _date = new DateTime.now();
+    if (picked == null) _date =  DateTime.now();
  }

  @override
  Widget build(BuildContext context) {
-    return new Column(
+    return  Column(
      children: <Widget>[
-        new Text('日期选择'),
-        new RaisedButton(
-          child: new Text('date selected:${_date.toString()}'),
+         Text('日期选择'),
+         RaisedButton(
+          child:  Text('date selected:${_date.toString()}'),
          onPressed: () {
            _selectDate(context);
          },
--- a/lib/widgets/components/Progress/CircularProgressIndicator/index.dart
+++ b/lib/widgets/components/Progress/CircularProgressIndicator/index.dart
@ -38,7 +38,7 @@ class _DemoState extends State<Demo> {
          content1,
          CircularDemo(),
        ],
-        codeUrl: '/components/Progress/CircularProgressIndicator/demo.dart',
+        codeUrl: 'components/Progress/CircularProgressIndicator/demo.dart',
        docUrl:
            'https://docs.flutter.io/flutter/material/LinearProgressIndicator-class.html',
        title: 'CircularProgressIndicator');
--- a/lib/widgets/components/Progress/LinearProgressIndicator/index.dart
+++ b/lib/widgets/components/Progress/LinearProgressIndicator/index.dart
@ -38,7 +38,7 @@ class _DemoState extends State<Demo> {
          content1,
          LinearProgressIndicatorDemo(),
        ],
-        codeUrl: '/components/Progress/LinearProgressIndicator/demo.dart',
+        codeUrl: 'components/Progress/LinearProgressIndicator/demo.dart',
        docUrl:
            'https://docs.flutter.io/flutter/material/LinearProgressIndicator-class.html',
        title: 'LinearProgressIndicator');
--- a/lib/widgets/components/Progress/RefreshProgressIndicator/index.dart
+++ b/lib/widgets/components/Progress/RefreshProgressIndicator/index.dart
@ -35,7 +35,7 @@ class _DemoState extends State<Demo> {
          content1,
          // LinearProgressIndicatorDemo(),
        ],
-        codeUrl: '/components/Progress/RefreshProgressIndicator/demo.dart',
+        codeUrl: 'components/Progress/RefreshProgressIndicator/demo.dart',
        docUrl:'https://docs.flutter.io/flutter/material/RefreshProgressIndicator-class.html',
        title: 'RefreshProgressIndicator');
  }
--- a/lib/widgets/components/Scaffold/Scaffold/demo.dart
+++ b/lib/widgets/components/Scaffold/Scaffold/demo.dart
@ -37,9 +37,9 @@ class _ScaffoldDemo extends State with SingleTickerProviderStateMixin {
    // 如果省略了 leading ，但 AppBar 在带有 Drawer 的 Scaffold 中，则会插入一个 button 以打开 Drawer。
    // 否则，如果最近的 Navigator 具有任何先前的 router ，则会插入BackButton。
    // 这种行为可以通过设置来关闭automaticallyImplyLeading 为false。在这种情况下，空的 leading widget 将导致 middle/title widget 拉伸开始。
-    return new SizedBox(
+    return  SizedBox(
        height: 500,
-        child: new Scaffold(
+        child:  Scaffold(
          appBar: AppBar(
            title: Text('Sample Code'),
          ),
--- a/lib/widgets/components/Scaffold/Scaffold/index.dart
+++ b/lib/widgets/components/Scaffold/Scaffold/index.dart
@ -56,7 +56,7 @@ class _DemoState extends State<Demo> {
      codeUrl: 'components/Scaffold/Scaffold/demo.dart',
      contentList: [
        _Text0,
-        new ScaffoldDemo(),
+         ScaffoldDemo(),
      ],
      docUrl: 'https://docs.flutter.io/flutter/material/Scaffold-class.html',
    );
--- a/lib/widgets/components/Scaffold/ScaffoldState/demo.dart
+++ b/lib/widgets/components/Scaffold/ScaffoldState/demo.dart
@ -28,9 +28,9 @@ class _ScaffoldStateDemo extends State with SingleTickerProviderStateMixin {
    // 如果省略了 leading ，但 AppBar 在带有 Drawer 的 Scaffold 中，则会插入一个 button 以打开 Drawer。
    // 否则，如果最近的 Navigator 具有任何先前的 router ，则会插入BackButton。
    // 这种行为可以通过设置来关闭automaticallyImplyLeading 为false。在这种情况下，空的 leading widget 将导致 middle/title widget 拉伸开始。
-    return new SizedBox(
+    return  SizedBox(
        height: 500,
-        child:new Scaffold(
+        child: Scaffold(
          key:_scaffoldKey,
          appBar: AppBar(
            title: Text('ScaffoldState Demo'),
--- a/lib/widgets/components/Scroll/ScrollPhysics/demo.dart
+++ b/lib/widgets/components/Scroll/ScrollPhysics/demo.dart
@ -11,7 +11,7 @@ class ScrollPhysicsDemo extends StatefulWidget {
 }

 class _ScrollPhysicsDemoState extends State<ScrollPhysicsDemo> {
-  final PageController _pageController = new PageController();
+  final PageController _pageController =  PageController();
  double _currentPage = 0.0;

  @override
@ -54,21 +54,21 @@ class _SimplePage extends StatelessWidget {
  final double parallaxOffset;

  @override
-  Widget build(BuildContext context) => new Center(
+  Widget build(BuildContext context) =>  Center(
        child: Container(
          color: Theme.of(context).primaryColor,
-          child: new Center(
-            child: new Column(
+          child:  Center(
+            child:  Column(
              mainAxisSize: MainAxisSize.min,
              children: <Widget>[
-                new Text(
+                 Text(
                  data,
                  style: const TextStyle(fontSize: 60.0,color: Colors.white),
                ),
-                new SizedBox(height: 40.0),
-                new Transform(
+                 SizedBox(height: 40.0),
+                 Transform(
                  transform:
-                      new Matrix4.translationValues(parallaxOffset, 0.0, 0.0),
+                       Matrix4.translationValues(parallaxOffset, 0.0, 0.0),
                  child: const Text('左右滑动，这是第二行滚动速度更快的小字',style: const TextStyle(fontSize: 16.0,color: Colors.white),),
                ),
              ],