Android のGPS切断からの復帰処理のデバッグ

lib/pages/index/index_controller.dart

@@ -20,7 +20,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import '../../main.dart';
 
 
-class IndexController extends GetxController {
+class IndexController extends GetxController with WidgetsBindingObserver {
   List<GeoJSONFeatureCollection> locations = <GeoJSONFeatureCollection>[].obs;
   List<GeoJSONFeature> currentFeature = <GeoJSONFeature>[].obs;
   List<Destination> currentDestinationFeature = <Destination>[].obs;
@@ -183,6 +183,9 @@ class IndexController extends GetxController {
         _connectivity.onConnectivityChanged.listen(_updateConnectionStatus);
     super.onInit();
 
+    WidgetsBinding.instance?.addObserver(this);
+    _startLocationService(); // アプリ起動時にLocationServiceを開始する
+
     print('IndexController onInit called'); // デバッグ用の出力を追加
 
   }
@@ -196,9 +199,48 @@ class IndexController extends GetxController {
   @override
   void onClose() {
     _connectivitySubscription.cancel();
+    WidgetsBinding.instance?.removeObserver(this);
+    _stopLocationService(); // アプリ終了時にLocationServiceを停止する
     super.onClose();
   }
 
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+
+    if (state == AppLifecycleState.resumed) {
+      if (!_isLocationServiceRunning()) {
+        _startLocationService();
+      }
+    } else if (state == AppLifecycleState.paused) {
+      _stopLocationService();
+    }
+  }
+
+  bool _isLocationServiceRunning() {
+    // LocationServiceが実行中かどうかを確認する処理を実装する
+    // 例えば、SharedPreferencesにサービスの状態を保存するなど
+    // ここでは簡単のために、常にfalseを返すようにしています
+    return false;
+  }
+
+  void _startLocationService() async {
+    const platform = MethodChannel('location');
+    try {
+      await platform.invokeMethod('startLocationService');
+    } on PlatformException catch (e) {
+      print("Failed to start location service: '${e.message}'.");
+    }
+  }
+
+  void _stopLocationService() async {
+    const platform = MethodChannel('location');
+    try {
+      await platform.invokeMethod('stopLocationService');
+    } on PlatformException catch (e) {
+      print("Failed to stop location service: '${e.message}'.");
+    }
+  }
+
   /*
   @override
   void onReady() async {