update

lib/Home/HomePage.dart

@@ -6,10 +6,32 @@ class HomePage extends StatefulWidget {
 }
 
 class _HomePageState extends State<HomePage> {
+  void _incrementCounter() {
+    setState(() {
+      // This call to setState tells the Flutter framework that
+      // something has changed in this State, which causes it to rerun
+      // the build method below so that the display can reflect the
+      // updated values. If we changed _counter without calling
+      // setState(), then the build method would not be called again,
+      // and so nothing would appear to happen.
+    });
+
+
   @override
   Widget build(BuildContext context) {
-    return Container(
-      color: Colors.red,
+    return new Scaffold(
+      appBar: new AppBar(
+        // Here we take the value from the MyHomePage object that
+        // was created by the App.build method, and use it to set
+        // our appbar title.
+        title: new Text('网络请求'),
+      ),
+      body: new Center(
+        child: new RaisedButton(
+           onPressed: _incrementCounter,
+           color: Colors.blue[400],
+           child: new Text('RaisedButton',style: new TextStyle(color: Colors.white))),
+      ),
     );
   }
 }
\ No newline at end of file

pubspec.lock

@@ -29,6 +29,13 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.14.11"
+  cookie_jar:
+    dependency: transitive
+    description:
+      name: cookie_jar
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.0"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -36,6 +43,13 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "0.1.2"
+  dio:
+    dependency: "direct main"
+    description:
+      name: dio
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.3"
   flutter:
     dependency: "direct main"
     description: flutter

pubspec.yaml

@@ -20,6 +20,8 @@ dependencies:
   flutter:
     sdk: flutter
 
+  dio: ^2.1.0
+
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^0.1.2