重构example项目结构

example/lib/demo.dart

@@ -0,0 +1,68 @@
+import 'package:amap_map_example/data/demos.dart';
+import 'package:amap_map_example/main.dart';
+import 'package:flutter/material.dart';
+
+class DemoPage extends StatefulWidget {
+  const DemoPage({
+    super.key,
+    required this.slug,
+  });
+
+  final String? slug;
+
+  @override
+  State<DemoPage> createState() => _DemoPageState();
+}
+
+class _DemoPageState extends State<DemoPage> {
+  late Map<String?, Demo> slugToDemoMap;
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    slugToDemoMap = slugToDemo(context);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (widget.slug == null || !slugToDemoMap.containsKey(widget.slug)) {
+      // Return to root if invalid slug.
+      Navigator.of(context).pop();
+    }
+    return ScaffoldMessenger(
+        child: AMapDemoPage(
+      restorationId: widget.slug!,
+      demo: slugToDemoMap[widget.slug]!,
+    ));
+  }
+}
+
+class AMapDemoPage extends StatefulWidget {
+  const AMapDemoPage({
+    super.key,
+    required this.restorationId,
+    required this.demo,
+  });
+
+  final String restorationId;
+  final Demo demo;
+
+  @override
+  State<StatefulWidget> createState() => _AMapDemoPageState(demo);
+}
+
+class _AMapDemoPageState extends State<AMapDemoPage> {
+  _AMapDemoPageState(this.demo);
+
+  final Demo demo;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text(demo.title)),
+      body: SafeArea(
+        child: Builder(builder: demo.configurations.first.buildRoute),
+      ),
+    );
+  }
+}