final

lib/widgets/general/download_item.dart

@@ -12,8 +12,8 @@ import '../../utils/utils.dart';
 
 class DownloadItem extends StatefulWidget {
   final dynamic desc;
-  final double width;
-  const DownloadItem(this.desc, {Key key, this.width}) : super(key: key);
+  final double? width;
+  const DownloadItem(this.desc, {Key? key, this.width}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() {
@@ -52,7 +52,7 @@ class DownloadItemState extends State<DownloadItem> {
                         margin: EdgeInsets.only(right: 16.0),
                       ),
                       Container(
-                        width: widget.width != null ? widget.width - iconWidth - buttonWidth - 60 : MediaQuery.of(context).size.width - iconWidth - buttonWidth - 60,
+                        width: widget.width != null ? widget.width! - iconWidth - buttonWidth - 60 : MediaQuery.of(context).size.width - iconWidth - buttonWidth - 60,
                         child: Column(
                           mainAxisAlignment: MainAxisAlignment.start,
                           crossAxisAlignment: CrossAxisAlignment.start,
@@ -186,9 +186,9 @@ class DownloadItemState extends State<DownloadItem> {
   }
 
   Widget getDownloadButton() {
-    String downloadUrl;
-    String os = Utils.getOs();
-    String selectedOs;
+    String? downloadUrl;
+    String? os = Utils.getOs();
+    String? selectedOs;
     List<String> supportedOss = [];
     for (int i = 0; i < (widget.desc['urls'] as List).length; i++) {
       supportedOss.add((widget.desc['urls'] as List)[i]['os']);
@@ -244,7 +244,7 @@ class DownloadItemState extends State<DownloadItem> {
     } else if (downloadUrl != null && downloadUrl.isNotEmpty) {
       return ElevatedButton(
         style: ElevatedButton.styleFrom(
-          primary: Theme.of(context).primaryColor,
+          backgroundColor: Theme.of(context).primaryColor,
           padding: EdgeInsets.all(8)
         ),
         child: Row(
@@ -255,7 +255,7 @@ class DownloadItemState extends State<DownloadItem> {
               padding: EdgeInsets.only(right: 0.0, left: 6.0, top: 6.0, bottom: 6.0),
               child: Icon(
                 IconData(
-                    Utils.getOsFontHex(selectedOs),
+                    Utils.getOsFontHex(selectedOs!),
                     fontFamily: 'wisetronic',
                     fontPackage: null
                 ),