如何在flutter中将https网络URL图像下载到应用程序目录中

【问题标题】：how to download https network URL images into app directory in flutter如何在flutter中将https网络URL图像下载到应用程序目录中
【发布时间】：2021-02-10 16:51:21
【问题描述】：

将'package:http/http.dart'导入为http；

导入'package:image_picker_saver/image_picker_saver.dart';

try {
  var response = await http.get(imageURL); // problem is here (only working on http URL)

  debugPrint(response.statusCode.toString());

  var filePath = await ImagePickerSaver.saveFile(
      fileData: response.bodyBytes);

  var savedFile= File.fromUri(Uri.file(filePath));

  print('Image path: $savedFile');

 /* setState(() {
    _imageFile = Future<File>.sync(() => savedFile);
  });*/

} on PlatformException catch (error) {
  print(error);
}

【问题讨论】：

标签： flutter https dart-pub

【解决方案1】：

看起来类似于：How to Download Video from Online and store it local Device then play video on Flutter apps Using video player?

这是我当时给出的答案：

你可能想试试dio 包，它是一个支持文件下载并将其本地保存到给定路径的http客户端。

这是一个代码示例（来源：iampawan's Github）

Future downloadFile(String url) async {
  Dio dio = Dio();

  try {
    var dir = await getApplicationDocumentsDirectory();
    await dio.download(url, "${dir.path}/myFile.txt", onProgress: (rec, total) {
      print("Rec: $rec , Total: $total");
    });
  } catch (e) {
    print(e);
  }
  print("Download completed");
}

您还需要path_provider，请使用getApplicationDocumentsDirectory()。

【讨论】：