final

lib/widgets/mobile/mobile_my_support.dart

@@ -18,7 +18,7 @@ import '../../widgets/mobile/MobileBottomNav.dart';
 
 class MobileMySupport extends StatefulWidget {
   final int businessId;
-  const MobileMySupport({Key key, this.businessId}) : super(key: key);
+  const MobileMySupport({Key? key, required this.businessId}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() {
@@ -28,7 +28,7 @@ class MobileMySupport extends StatefulWidget {
 }
 
 class MobileMySupportState extends State<MobileMySupport> {
-  List<Ticket> tickets;
+  List<Ticket>? tickets;
 
   int _page = 1;
   int _pageCount = 1;
@@ -41,7 +41,7 @@ class MobileMySupportState extends State<MobileMySupport> {
   void _onRefresh() {
     _page = 1;
     if (tickets != null) {
-      tickets.clear();
+      tickets?.clear();
     } else {
       tickets = [];
     }
@@ -101,7 +101,7 @@ class MobileMySupportState extends State<MobileMySupport> {
           enablePullUp: true,
           header: WaterDropHeader(),
           footer: CustomFooter(
-            builder: (BuildContext context, LoadStatus mode){
+            builder: (BuildContext context, LoadStatus? mode){
               Widget footer;
               if(mode == LoadStatus.idle) {
                 footer = Text(S.of(context).pull_up_to_load_more);
@@ -143,9 +143,9 @@ class MobileMySupportState extends State<MobileMySupport> {
       return SizedBox.shrink();
     }
     return ListView.builder(
-        itemCount: tickets.length <= 1 ? 1 : tickets.length,
+        itemCount: tickets!.length <= 1 ? 1 : tickets!.length,
         itemBuilder: (BuildContext context, int i) {
-          if (tickets.length <= 0) {
+          if (tickets!.length <= 0) {
             return Container(
               padding: EdgeInsets.all(16.0),
               child: Center(
@@ -153,7 +153,7 @@ class MobileMySupportState extends State<MobileMySupport> {
               ),
             );
           } else {
-            Ticket ticket = tickets[i];
+            Ticket ticket = tickets![i];
 
             return GestureDetector(
               onTap: () {
@@ -273,7 +273,7 @@ class MobileMySupportState extends State<MobileMySupport> {
           if (tickets == null) {
             tickets = [];
           }
-          tickets.addAll((value['tickets'] as List).map((e) => Ticket.fromJson(e)).toList());
+          tickets!.addAll((value['tickets'] as List).map((e) => Ticket.fromJson(e)).toList());
         });
       }
     }).catchError((error) {