Flutter通过Mailer发送图像 [英] Flutter Sending Image via Mailer

问题描述

我正在尝试为我的代码找到解决方案。我正在尝试发送带有图片附件的邮件，但不知道该怎么做。我在该网站上搜索了几乎所有主题，但没有一个对我有帮助。

I'm trying to find a solution for my code. I'm trying to send mail with image attachment but I couldn't figured out how to do. I searched nearly all topics in this website but none of it helped me.

不使用附件，我能够发送电子邮件，但是当我使用附件并尝试发送图像时，什么也没有发生。我从代码中隐藏了私人信息。

Without using attachment, I'm able to send email but when I use attachment and trying to send my image, nothing happens. I hid private information from the code.

File newImage;

uploadImage() async {
final _storage = FirebaseStorage.instance;
final _picker = ImagePicker();
PickedFile image;

  image = await _picker.getImage(source: ImageSource.camera);
  var file = File(image.path);
  String filName = basename(file.path);
  // Upload to Firebase
  var snapshot = await _storage.ref().child(filName).putFile(file).onComplete;

  var downloadURL = await snapshot.ref.getDownloadURL();

  setState(() {
    imageUrl = downloadURL;
    newImage = image; // PickedFile can't be assigned to variable type File
  });

}

main(message) async{
var options = new SmtpOptions()
  // Hidden
var transport = new SmtpTransport(options);

var envelope = new Envelope()
  ..from = '[e-mail]'
  ..fromName = 'example'
  ..recipients = ['[e-mail]']
  ..subject = 'example'
  ..attachments.add(new Attachment(file: new File(newImage))) // File can't be assigned to parameter type 'String'
  ..text = "$message";

transport.send(envelope)
    .then((_) => print('email sent!'))
    .catchError((e) => print('Error: $e'));

}

推荐答案

您可以改用以下代码：

..attachments.add(new Attachment(file: new File(newImage.path)))

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