Save image to image gallery using "image_gallery_saver" and asking for permission using "permission_handler" with flutter

SaveImagetoPhotoGallary.dart

import 'dart:typed_data';

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:permission_handler/permission_handler.dart';

//iOS - add these keys to info.plist in your ios folder 
// NSPhotoLibraryAddUsageDescription and NSPhotoLibraryUsageDescription
// This gist uses flutter packages
// https://pub.dev/packages/image_gallery_saver
// https://pub.dev/packages/permission_handler
// dio

void main() {
  runApp(MyApp());
  _save();
}

_save() async {
  await _askPermission();
  var response = await Dio().get(
      "https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/h%3D300/sign=a62e824376d98d1069d40a31113eb807/838ba61ea8d3fd1fc9c7b6853a4e251f94ca5f46.jpg",
      options: Options(responseType: ResponseType.bytes));
  final result =
      await ImageGallerySaver.saveImage(Uint8List.fromList(response.data));
  print(result);
}