导出excel

@@ -438,6 +438,8 @@ class _ExportBookDataPageState extends State<ExportBookDataPage> {
             progress != null && progress != 100
                 ? LinearProgressIndicator(
                     value: progress / 100,
+                    backgroundColor: MyColours.color_A9E3E6,
+                    color: MyColours.color_438E93,
                   )
                 : VEmptyView(10),
             Container(
@@ -616,6 +618,7 @@ class _ExportBookDataPageState extends State<ExportBookDataPage> {
                   print(response);
                 } catch (e) {
                   print(e);
+                  Utils.showToast('下载异常，请稍后重试');
                 }
 
                 // taskId = await FlutterDownloader.enqueue(