如何在flutter中从Firebase存储获取下载URL

Question

以下代码用于将任何图像从图库/相机上传到 Firebase 存储。我成功地将图像与元数据一起上传到存储。现在的问题是我无法获取上传图像的下载 URL。尝试了很多但没有找到任何解决方案。

FirebaseStorage storage = FirebaseStorage.instance;
  final picker = ImagePicker();
  PickedFile pickedImage;
  File imageFile;

  Future<void> _upload(String inputSource) async {
    try {
      pickedImage = await picker.getImage(
          source: inputSource == 'camera'
              ? ImageSource.camera
              : ImageSource.gallery,
          maxWidth: 1920);

      final String fileName = path.basename(pickedImage.path);
      imageFile = File(pickedImage.path);

      try {
        // Uploading the selected image with some custom meta data
        await storage.ref(fileName).putFile(
              imageFile,
              SettableMetadata(
                customMetadata: {
                  'uploaded_by': 'A bad guy',
                  'description': 'Some description...'
                },
              ),
            );

        // Refresh the UI
        setState(() {});
      } on FirebaseException catch (error) {
        print(error);
      }
    } catch (err) {
      print(err);
    }
  }

Answer 1

希望您一切顺利\xe2\x80\xa6\n您可以尝试此方法将图像（任何文件）的 URL 从 Firebase 存储获取到 Firebase 存储，然后您可以检索图像。

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class _UploadAdState extends State<UploadAdPage> {\n  final formKey = GlobalKey<FormState>();\n  File _myimage;\n  String imgUrl;\n\n  Future getImage1(File chosenimage) async {\n PickedFile img =\n    await ImagePicker.platform.pickImage(source: ImageSource.gallery);\n\n if (chosenimage == null) return null;\n\n File selected = File(img.path);\n setState(() {\n  _myimage = chosenimage;\n });\n}\n\n// changing the firestore rules and deleteing if request.auth != null;\nsendData() async {\n// to upload the image to firebase storage\nvar storageimage = FirebaseStorage.instance.ref().child(_myimage.path);\nUploadTask task1 = storageimage.putFile(_myimage);\n\n// to get the url of the image from firebase storage\nimgUrl1 = await (await task1).ref.getDownloadURL();\n// you can save the url as a text in you firebase store collection now\n}\n}\n

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