feat: 直播、推荐、热门封面图片保存

lib/utils/download.dart

@@ -0,0 +1,39 @@
+import 'dart:typed_data';
+
+import 'package:dio/dio.dart';
+import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
+import 'package:image_gallery_saver/image_gallery_saver.dart';
+import 'package:permission_handler/permission_handler.dart';
+
+class DownloadUtils {
+  // 获取存储全县
+  static requestStoragePer() async {
+    Map<Permission, PermissionStatus> statuses = await [
+      Permission.storage,
+      Permission.photos,
+    ].request();
+    statuses[Permission.storage].toString();
+  }
+
+  static Future<bool> downloadImg(String imgUrl) async {
+    await requestStoragePer();
+    SmartDialog.showLoading(msg: '保存中');
+    var response = await Dio()
+        .get(imgUrl, options: Options(responseType: ResponseType.bytes));
+    String picName =
+        "plpl_cover_${DateTime.now().toString().split('-').join()}.png";
+    final result = await ImageGallerySaver.saveImage(
+      Uint8List.fromList(response.data),
+      quality: 100,
+      name: picName,
+    );
+    SmartDialog.dismiss();
+    if (result != null) {
+      if (result['isSuccess']) {
+        // ignore: avoid_print
+        await SmartDialog.showToast('「$picName」已保存 ');
+      }
+    }
+    return true;
+  }
+}