添加安卓保存权限

lib/pages/goods_share_page/goods_share_image/goods_share_image.dart

@@ -279,6 +279,17 @@ class _GoodsShareImageState extends State<GoodsShareImage>
       return null;
     }
 
+    // 检查并请求权限
+    status = await Permission.storage.status;
+    if (status != PermissionStatus.granted) {
+      status = await Permission.storage.request();
+    }
+    if (status == PermissionStatus.denied) {
+      Fluttertoast.showToast(msg: '暂无权限，分享失败');
+      return null;
+    }
+
+
     bool isSaveSuccess = false;
     if (_shareModel.poster != null) {
       isSaveSuccess = await SaveImage.save(imageBytes: _shareModel.poster);