重构example项目结构

example/lib/routes.dart

@@ -0,0 +1,47 @@
+import 'package:amap_map_example/demo.dart';
+import 'package:flutter/material.dart';
+
+typedef PathWidgetBuilder = Widget Function(BuildContext, String?);
+
+class Path {
+  const Path(this.pattern, this.builder);
+
+  /// A RegEx string for route matching.
+  final String pattern;
+
+  /// The builder for the associated pattern route. The first argument is the
+  /// [BuildContext] and the second argument a RegEx match if that is included
+  /// in the pattern.
+  ///
+  /// ```dart
+  /// Path(
+  ///   'r'^/([\w-]+)$',
+  ///   (context, matches) => Page(argument: match),
+  /// )
+  /// ```
+  final PathWidgetBuilder builder;
+}
+
+class RouteConfig {
+  static List<Path> _paths = [
+    Path(
+      r'^/([\w-]+)$',
+      (context, match) => DemoPage(slug: match),
+    ),
+  ];
+
+  static Route<dynamic>? onGenerateRoute(RouteSettings settings) {
+    for (final path in _paths) {
+      final regExpPattern = RegExp(path.pattern);
+      if (regExpPattern.hasMatch(settings.name!)) {
+        final firstMatch = regExpPattern.firstMatch(settings.name!)!;
+        final match = (firstMatch.groupCount == 1) ? firstMatch.group(1) : null;
+
+        return MaterialPageRoute<void>(
+          builder: (context) => path.builder(context, match),
+          settings: settings,
+        );
+      }
+    }
+  }
+}