Added ProgressIndicator and Error Message

lib/Widgets/flood_station_list_view.dart

@@ -11,7 +11,11 @@ class FloodStationListView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ListView.builder(
+    return ListView.separated(
+      separatorBuilder: (context, index) => Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 15.0),
+        child: Divider(),
+      ),
       itemBuilder: (context, index) {
         final item = _stations.elementAt(index);
         return ListTile(

lib/pages/flood_station_page.dart

@@ -20,7 +20,7 @@ class FloodStationPage extends StatelessWidget {
           builder: (context, snapshot) {
             if (snapshot.hasData) {
               if (snapshot.data!.isEmpty) {
-                return Text('No readings on record.');
+                return Center(child: Text('No readings on record.'));
               }
               return Center(
                 child: Padding(
@@ -30,8 +30,10 @@ class FloodStationPage extends StatelessWidget {
                   ),
                 ),
               );
+            } else if (snapshot.hasError) {
+              return Center(child: Text('An unknown Error occured'));
             } else {
-              return Placeholder();
+              return Center(child: CircularProgressIndicator());
             }
           }),
     );