fix package detail bug

lib/pages/PackagePages/package_detail_screen.dart

@@ -17,6 +17,7 @@ class _PackageDetailScreenState extends State<PackageDetailScreen> {
   bool isInit = true;
   bool isEmpty = false;
   PackageDetailObject? datas;
+
   @override
   void didChangeDependencies() async {
     if (isInit) {
@@ -27,11 +28,12 @@ class _PackageDetailScreenState extends State<PackageDetailScreen> {
         (result) {
           setState(
             () {
-              if (result.id == 'null') {
-                isEmpty = true;
-              }
               datas = result;
               isInit = false;
+              if (result.id == 'null')
+                isEmpty = true;
+              else
+                isEmpty = false;
             },
           );
         },
@@ -49,7 +51,12 @@ class _PackageDetailScreenState extends State<PackageDetailScreen> {
       child: Scaffold(
         appBar: AppBar(
           titleSpacing: -10,
-          title: Text('Packages', style: TextStyle(color: Colors.white,),),
+          title: Text(
+            'Packages',
+            style: TextStyle(
+              color: Colors.white,
+            ),
+          ),
           backgroundColor: Colors.black,
           leading: IconButton(
             icon: Icon(

lib/providers/packages.dart

@@ -316,11 +316,13 @@ class PackageProvider extends ChangeNotifier {
     }
     var data = json.decode(response.body)['data'];
     List<String> itemsList = [];
-    for (var item in data['items']) {
-      // itemsList
-      //     .add("${item['name']} - ${item['udi'] != null ? item['udi'] : ''}");
+    if(data['items'] != null){
+      for (var item in data['items']) {
+        // itemsList
+        //     .add("${item['name']} - ${item['udi'] != null ? item['udi'] : ''}");
         itemsList
-          .add("${item['id']}  ${item['name']}");
+            .add("${item['id']}  ${item['name']}");
+      }
     }
     print(data);
     result = PackageDetailObject(