大幅変更＆環境バージョンアップ

lib/widgets/base_layer_widget.dart

@@ -1,24 +1,45 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_map/flutter_map.dart';
-import 'package:flutter_map_tile_caching/flutter_map_tile_caching.dart';
+//import 'package:flutter_map_tile_caching/flutter_map_tile_caching.dart';
 
 class BaseLayer extends StatelessWidget {
-  const BaseLayer({Key? key}) : super(key: key);
+  const BaseLayer({super.key});
 
   @override
   Widget build(BuildContext context) {
     return TileLayer(
-                    urlTemplate: "https://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png",
-                    tileProvider: FMTC.instance('OpenStreetMap (A)').getTileProvider(
-                              FMTCTileProviderSettings(
-                                behavior: CacheBehavior.values
-                                    .byName('cacheFirst'),
-                                cachedValidDuration: const Duration(
-                                        days: 14
-                                      ),
-                              ),
-                            ),
-                  );
+      urlTemplate: "https://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png",
+      /*userAgentPackageName: 'com.example.app',*/
+
+      /*
+      tileProvider: FMTC.instance('OpenStreetMap (A)').getTileProvider(
+            settings: FMTCTileProviderSettings(
+              behavior: CacheBehavior.values.byName('cacheFirst'),
+              cachedValidDuration: const Duration(days: 14),
+            ),
+          ),
+       */
+
+      userAgentPackageName: 'com.example.app',
+      tileBuilder: (context, tileWidget, tile) {
+        return Stack(
+          fit: StackFit.passthrough,
+          children: [
+            tileWidget,
+            /*
+            if (tile.loadError != null)
+              Center(
+                child: Icon(Icons.error, color: Colors.red.withOpacity(0.5)),
+              ),
+             */
+          ],
+        );
+      },
+      errorTileCallback: (tile, error, stackTrace) {
+        debugPrint('Tile load error: $error');
+        debugPrint('Stack trace: $stackTrace');
+      },
+    );
   }
 }