Your locations persist

lib/basicLocation.dart

@@ -8,4 +8,18 @@ class BasicLocation  {
   static BasicLocation noLocation = new BasicLocation(lat:0.0, lon:0.0);
 
   BasicLocation({@required this.lat, @required this.lon, this.description});
+
+  BasicLocation.fromJson(Map<String, dynamic> json)
+      : lat = json['lat'],
+      lon = json['lon'],
+      description = json['description']
+  ;
+
+  Map<String, dynamic> toJson() =>
+    {
+      'lat': lat,
+      'lon': lon,
+      'description': description,
+    };
+
 }