Initial Commit for PlaformChannel Sample App (#453)

platform_channels/lib/main.dart

@@ -0,0 +1,70 @@
+// Copyright 2020 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:platform_channels/src/method_channel_demo.dart';
+
+void main() {
+  runApp(PlatformChannelSample());
+}
+
+class PlatformChannelSample extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      routes: {
+        '/methodChannelDemo': (context) => MethodChannelDemo(),
+      },
+      title: 'Platform Channel Sample',
+      home: HomePage(),
+    );
+  }
+}
+
+class DemoInfo {
+  final String demoTitle;
+  final String demoRoute;
+
+  DemoInfo(this.demoTitle, this.demoRoute)
+      : assert(demoTitle != null),
+        assert(demoRoute != null);
+}
+
+List<DemoInfo> demoList = [
+  DemoInfo(
+    'MethodChannelDemo',
+    '/methodChannelDemo',
+  ),
+];
+
+class HomePage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Platform Channel Sample'),
+      ),
+      body: ListView(
+        children: demoList.map((demoInfo) => DemoTile(demoInfo)).toList(),
+      ),
+    );
+  }
+}
+
+/// This widget is responsible for displaying the [ListTile] on [HomePage].
+class DemoTile extends StatelessWidget {
+  final DemoInfo demoInfo;
+
+  DemoTile(this.demoInfo);
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      title: Text(demoInfo.demoTitle),
+      onTap: () {
+        Navigator.pushNamed(context, demoInfo.demoRoute);
+      },
+    );
+  }
+}