扫码核销安卓提醒

+import 'dart:io';
+
 import 'package:flutter/material.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_easyrefresh/easy_refresh.dart';
 import 'package:flutter_easyrefresh/easy_refresh.dart';
@@ -14,9 +16,11 @@ import 'package:one_key/widgets/h_empty_view.dart';
 import 'package:one_key/widgets/round_button.dart';
 import 'package:one_key/widgets/round_button.dart';
 import 'package:one_key/widgets/system_app_bar.dart';
 import 'package:one_key/widgets/system_app_bar.dart';
 import 'package:one_key/widgets/v_empty_view.dart';
 import 'package:one_key/widgets/v_empty_view.dart';
+import 'package:permission_handler/permission_handler.dart';
 import 'package:provider/provider.dart';
 import 'package:provider/provider.dart';
 import 'package:barcode_scan2/barcode_scan2.dart';
 import 'package:barcode_scan2/barcode_scan2.dart';
 
 
+import '../../app.dart';
 import '../../provider/marketing_center_provider.dart';
 import '../../provider/marketing_center_provider.dart';
 import '../../utils/dialog_util.dart';
 import '../../utils/dialog_util.dart';
 import '../../utils/misc.dart';
 import '../../utils/misc.dart';
@@ -124,6 +128,18 @@ class _CouponPageState extends State<CouponPage> with TickerProviderStateMixin {
 
 
   Future<void> _scan() async {
   Future<void> _scan() async {
     try {
     try {
+      //全局提示权限使用目的
+      if (Platform.isAndroid) {
+        PermissionStatus permissionStatus = await Permission.camera.status;
+
+        if (permissionStatus != PermissionStatus.permanentlyDenied) {
+//全局提示权限使用目的
+          BuildContext context = App.navigatorKey.currentState.overlay.context;
+          DialogUtil.showAuthorityDestination(
+              context, 'h_camera', '相机权限使用说明', '用于扫描二维码进行优惠券核销');
+        }
+      }
+
       final result = await BarcodeScanner.scan(
       final result = await BarcodeScanner.scan(
         options: ScanOptions(
         options: ScanOptions(
           strings: {'cancel': '退出', 'flash_on': '开闪光灯', 'flash_off': '关闪光灯'},
           strings: {'cancel': '退出', 'flash_on': '开闪光灯', 'flash_off': '关闪光灯'},