optimized

lib/main_nrog.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_map_tile_caching/flutter_map_tile_caching.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:rogapp/nrog/pages/permission_page.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await FlutterMapTileCaching.initialise();
+  final StoreDirectory instanceA = FMTC.instance('OpenStreetMap (A)');
+  await instanceA.manage.createAsync();
+  await instanceA.metadata.addAsync(
+    key: 'sourceURL',
+    value: 'https://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png',
+  );
+  await instanceA.metadata.addAsync(
+    key: 'validDuration',
+    value: '14',
+  );
+  await instanceA.metadata.addAsync(
+    key: 'behaviour',
+    value: 'cacheFirst',
+  );
+  runApp(
+    const ProviderScope(child: MyApp()),
+  );
+}
+
+class MyApp extends StatefulWidget {
+  const MyApp({super.key});
+
+  @override
+  State<MyApp> createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+        debugShowCheckedModeBanner: false,
+        title: 'Flutter Demo',
+        theme: ThemeData(
+          colorScheme: ColorScheme.fromSeed(
+              seedColor: const Color.fromARGB(255, 124, 156, 9)),
+          useMaterial3: true,
+        ),
+        home: const PermissionPage());
+  }
+}