从Firebase下载图像到Flutter [英] Download an image from Firebase to Flutter

问题描述

有很多例子可以将文件上传到firebase并获取downloadUrl，但是我没有找到一个示例来获取图片的DownloadURL并在Flutter小部件中使用它。

There are many examples of uploading a file to firebase and getting a downloadUrl but there's no example that I found to get the DownloadURL for an image and using it in a Flutter widget.

这是与上传文件有关的一个

This is the one which is related to uploading a file

final StorageReference ref =
    FirebaseStorage.instance.ref().child("foo$rand.txt");
final StorageUploadTask uploadTask = ref.put(file);
final Uri downloadUrl = (await uploadTask.future).downloadUrl;
final http.Response downloadData = await http.get(downloadUrl);

任何人都可以举例说明firebase中已存在的文件以及如何获取下载链接？

Can anyone give an example of one where the file already exists in firebase and how to get a download link?

推荐答案

您可以使用Storage API下载，例如上传

You can just use the Storage API to download, like with upload

someMethod() async {
  var data = await FirebaseStorage.instance.ref().child("foo$rand.txt").getData();
  var text = new String.fromCharCodes(data);
  print(data);
}

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