我从Firebase存储器中获取图像，用相机拍摄照片，或者从库中选择一个，当其中一个完成时，我有一个类来存储图像，以便在需要时使用它。
要选择图像（画廊，相机等），首先你可以使用图像选择器包。

final pickedFile = await picker.getImage(source: ImageSource.camera);

  File image;
  if (pickedFile != null) {
    image = File(pickedFile.path);
  } else {
    print('No image selected.');
    return;
  }

然后检测你想要保存这个文件映像的引用

//Upload the file to firebase
        StorageUploadTask uploadTask = reference.putFile(image);
    
        StorageTaskSnapshot taskSnapshot = await uploadTask.onComplete;
    
        // Waits till the file is uploaded then stores the download url
        String url = await taskSnapshot.ref.getDownloadURL();

• • 代码**

FirebaseStorage _storage = FirebaseStorage.instance;

    Future<Uri> uploadPic() async {

    //Get the file from the image picker and store it 
    File image = await ImagePicker.pickImage(source: ImageSource.gallery);  

    //Create a reference to the location you want to upload to in firebase  
    StorageReference reference = _storage.ref().child("images/");

    //Upload the file to firebase 
    StorageUploadTask uploadTask = reference.putFile(file);

    // Waits till the file is uploaded then stores the download url 
    Uri location = (await uploadTask.future).downloadUrl;

    //returns the download url 
    return location;
   }