feat(update):添加图片长按下载

lib/upload_image/look_images_widget.dart

@@ -3,7 +3,9 @@ import 'dart:io';
 import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_common/upload_image/down_load_image_tool.dart';
 import 'package:flutter_common/upload_image/ossUtil.dart';
+import 'package:flutter_common/utils/toast_utils.dart';
 import 'package:get/get.dart';
 import 'package:image_editor_plus/image_editor_plus.dart';
 import 'package:path_provider/path_provider.dart';
@@ -14,6 +16,7 @@ class LookImagesTool {
     required List<String> listData,
     int? currentPage,
     void Function(String)? onCallBack,
+    void Function(String, int)? onEditCallBack,
     String? oSSAccessKeyId,
     Function? callBack,
     bool? isShowEdit,
@@ -31,6 +34,7 @@ class LookImagesTool {
               listData: listData,
               currentPage: currentPage,
               onCallBack: onCallBack,
+              onEditCallBack: onEditCallBack,
               oSSAccessKeyId: oSSAccessKeyId,
               policy: policy,
               callback: callback,
@@ -52,6 +56,7 @@ class LookImagesWidget extends StatefulWidget {
   final String? ossDirectory;
   final String? ossHost;
   final void Function(String)? onCallBack;
+  final void Function(String, int)? onEditCallBack;
   final bool? isShowEdit;
 
   const LookImagesWidget({
@@ -65,6 +70,7 @@ class LookImagesWidget extends StatefulWidget {
     this.ossDirectory,
     this.ossHost,
     this.onCallBack,
+    this.onEditCallBack,
     this.isShowEdit,
   });
 
@@ -73,7 +79,7 @@ class LookImagesWidget extends StatefulWidget {
 }
 
 class _LookImagesWidgetState extends State<LookImagesWidget> {
-  List listData = [];
+  List<String> listData = [];
   late int currentPage;
   late int initialPage = 0;
 
@@ -87,9 +93,11 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
         options: Options(responseType: ResponseType.bytes),
       );
       // 响应成功且数据非空时，直接转为 Uint8List
-      return response.statusCode == 200 && response.data != null ? Uint8List.fromList(response.data!) : null;
+      return response.statusCode == 200 && response.data != null
+          ? Uint8List.fromList(response.data!)
+          : null;
     } catch (e) {
-      print('图片转换失败：$e'); // 捕获网络错误、URL 非法等异常
+      debugPrint('图片转换失败：$e'); // 捕获网络错误、URL 非法等异常
       return null;
     }
   }
@@ -143,11 +151,16 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
     if (uint8List.length < 4) return "bin"; // 无法识别时返回二进制后缀
 
     // PNG 头：89 50 4E 47
-    if (uint8List[0] == 0x89 && uint8List[1] == 0x50 && uint8List[2] == 0x4E && uint8List[3] == 0x47) {
+    if (uint8List[0] == 0x89 &&
+        uint8List[1] == 0x50 &&
+        uint8List[2] == 0x4E &&
+        uint8List[3] == 0x47) {
       return "png";
     }
     // JPG 头：FF D8 FF
-    else if (uint8List[0] == 0xFF && uint8List[1] == 0xD8 && uint8List[2] == 0xFF) {
+    else if (uint8List[0] == 0xFF &&
+        uint8List[1] == 0xD8 &&
+        uint8List[2] == 0xFF) {
       return "jpg";
     }
     // MP4 头：00 00 00 18 66 74 79 70
@@ -169,7 +182,8 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
   }
 
   /// Uint8List 转临时 File 并且上传到oss并返回访问路径
-  Future<String?> uint8ListToTempFile(Uint8List uint8List, {String fileName = "temp_file"}) async {
+  Future<String?> uint8ListToTempFile(Uint8List uint8List,
+      {String fileName = "temp_file"}) async {
     if (uint8List.isEmpty) return null;
     try {
       // 1. 获取临时存储目录（跨平台兼容）
@@ -178,7 +192,8 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
       String tempPath = tempDir.path;
 
       // 2. 拼接文件路径（可自定义后缀，如 .png、.mp4 等）
-      File tempFile = File("$tempPath/$fileName.${getExtension(uint8List)}"); // 自动识别后缀（可选）
+      File tempFile =
+          File("$tempPath/$fileName.${getExtension(uint8List)}"); // 自动识别后缀（可选）
 
       // 3. 将 Uint8List 写入文件
       await tempFile.writeAsBytes(uint8List);
@@ -198,14 +213,29 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
       // print("上传后的访问路径：$imageUrl");
       return imageUrl;
     } catch (e) {
-      print("转换临时文件失败：$e");
+      debugPrint("转换临时文件失败：$e");
       return null;
     }
   }
 
+  Future<void> _saveCurrentImage() async {
+    if (listData.isEmpty) {
+      ToastUtils.showToast(msg: '暂无可保存的图片');
+      return;
+    }
+
+    final result = await DownLoadImageTool.savePhoto(
+      imageUrl: listData[currentPage],
+    );
+
+    if (result != null) {
+      ToastUtils.showToast(msg: '已保存到相册');
+    }
+  }
+
   @override
   void initState() {
-    listData = widget.listData;
+    listData = List<String>.from(widget.listData);
     if (widget.currentPage == null) {
       initialPage = 0;
       currentPage = 0;
@@ -220,40 +250,63 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
     return Scaffold(
       body: Stack(
         children: [
-          PhotoViewGallery.builder(
-            itemCount: listData.length,
-            pageController: PageController(initialPage: currentPage),
-            onPageChanged: (index) {
-              setState(() {
-                currentPage = index;
-              });
-            },
-            builder: (_, index) {
-              return PhotoViewGalleryPageOptions(
-                imageProvider: NetworkImage(
-                  listData[index],
-                ),
-              );
-            },
+          GestureDetector(
+            behavior: HitTestBehavior.translucent,
+            onLongPress: _saveCurrentImage,
+            child: PhotoViewGallery.builder(
+              itemCount: listData.length,
+              pageController: PageController(initialPage: currentPage),
+              onPageChanged: (index) {
+                setState(() {
+                  currentPage = index;
+                });
+              },
+              builder: (_, index) {
+                return PhotoViewGalleryPageOptions(
+                  imageProvider: NetworkImage(
+                    listData[index],
+                  ),
+                );
+              },
+            ),
           ),
           Positioned(
-              left: 15,
-              top: 50,
-              child: GestureDetector(onTap: () => Get.back(), child: Icon(Icons.arrow_back_ios, color: Colors.white))),
+            left: 15,
+            top: 50,
+            child: GestureDetector(
+              onTap: () => Get.back(),
+              child: const Icon(Icons.arrow_back_ios, color: Colors.white),
+            ),
+          ),
           Positioned(
-              right: 15,
-              top: 50,
-              child: GestureDetector(
-                  onTap: () async {
-                    Uint8List? imageFile = await editImage(url: listData[currentPage]);
-                    String? url = await uint8ListToTempFile(imageFile ?? Uint8List(0));
-                    if(widget.onCallBack != null){
-                      widget.onCallBack!(url??'');
-                    }
-                  },
-                  child: Visibility(
-                      visible: widget.isShowEdit??false,
-                      child: Icon(Icons.edit, color: Colors.white)))),
+            right: 15,
+            top: 50,
+            child: GestureDetector(
+              onTap: () async {
+                Uint8List? imageFile =
+                    await editImage(url: listData[currentPage]);
+                if (imageFile == null || imageFile.isEmpty) {
+                  return;
+                }
+
+                String? url = await uint8ListToTempFile(imageFile);
+                if (url == null || url.isEmpty) {
+                  ToastUtils.showToast(msg: '图片上传失败');
+                  return;
+                }
+
+                setState(() {
+                  listData[currentPage] = url;
+                });
+                widget.onEditCallBack?.call(url, currentPage);
+                widget.onCallBack?.call(url);
+              },
+              child: Visibility(
+                visible: widget.isShowEdit ?? false,
+                child: const Icon(Icons.edit, color: Colors.white),
+              ),
+            ),
+          ),
           //图片张数指示器
           Positioned(
             left: 0,