add ListView widget.

Author: nb312

lib/const/page_item_const.dart

@@ -167,4 +167,9 @@ const PAGE_ITEMS = [
     "img": PageImage.FLUTTER_OPEN,
     "click": PageName.FLOW,
   },
+  {
+    "title": PageName.LAYOUT,
+    "img": PageImage.FLUTTER_OPEN,
+    "click": PageName.LAYOUT,
+  },
 ];

lib/const/page_name_const.dart

@@ -38,4 +38,6 @@ class PageName {
   static const INDEX_STACK = "IndexedStack";
   static const EXPANDED = "Expanded";
   static const FLOW = "Flow";
+  static const LAYOUT = "Layout";
+
 }

lib/main.dart

@@ -52,6 +52,7 @@ class FlutterOpenApp extends StatelessWidget {
         PageName.INDEX_STACK: (context) => IndexStackPage(),
         PageName.EXPANDED: (context) => ExpandPage(),
         PageName.FLOW: (context) => FlowPage(),
+        PageName.LAYOUT: (context) => LayoutPage(),
       },
     );
   }

lib/page/muti/LayoutPage.dart

@@ -0,0 +1,78 @@
+///
+/// Created by NieBin on 2019/5/26
+/// Github: https://github.com/nb312
+/// Email: [email protected]
+import "package:flutter/material.dart";
+import 'package:flutter_widgets/const/_const.dart';
+
+class LayoutPage extends StatefulWidget {
+  @override
+  LayoutState createState() => LayoutState();
+}
+
+class LayoutState extends State<LayoutPage> {
+  Widget _builder(BuildContext context, BoxConstraints constraints) =>
+      Container(
+        constraints:
+            BoxConstraints.expand(height: 100, width: constraints.maxWidth),
+        color: RED,
+      );
+
+  Widget _listView() => ListView(
+        shrinkWrap: true,
+        itemExtent: 100,
+        controller: ScrollController(initialScrollOffset: 100),
+        children: <Widget>[
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: RED,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: BLUE,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: YELLOW,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: RED_LIGHT,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: BLUE_DEEP,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: RED,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: BLUE,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: YELLOW,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: RED_LIGHT,
+          ),
+          Container(
+            constraints: BoxConstraints.expand(height: 100),
+            color: BLUE_DEEP,
+          )
+        ],
+      );
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(""),
+      ),
+      body: _listView(),
+    );
+  }
+}

lib/page/muti/_muti.dart

@@ -6,3 +6,4 @@
 export "IndexStackPage.dart";
 export "ExpandPage.dart";
 export 'FlowPage.dart';
+export 'LayoutPage.dart';