How to get a Stream of download url in firebase flutter

Question

i want to create a stream of firebase storage download link for all the images

   firebase_storage.FirebaseStorage storage =
       firebase_storage.FirebaseStorage.instance;
   firebase_storage.Reference ref =
       storage.ref().child('images');
   firebase_storage.ListResult result = await ref.listAll();
   result.items.forEach((firebase_storage.Reference ref) async* {
     print('Found file: $ref');
     yield (await ref.getDownloadURL()).toString();
   });
 }

the snapshot data is null if i create with future it seems to work when i add all the urls in a list and give to listview builder but i cant get each string through stream

Answer 1

I've had problems with ForEach and await getDownloadUrl(). Try using a for loop instead.

 for (Reference refin result.items) async* {
  print('Found file: $ref');
  yield (await getDownloadUrl().toString());
 }

Answer 2

First thing first create a instance of FirebaseStorage

final _firestorage = FirebaseStorage.instance;

after then we need ref. for get image from storage.

final ref = _firestorage.ref().child('image');

and then we can create image's url.

var imageURL = await ref.getDownloadURL();

and try this.

print(imageURL);

if you wanna get this codes into fully method:

String getImageURL(){
  final _firestorage = FirebaseStorage.instance;
  final ref = _firestorage.ref().child('image');
  var imageURL = await ref.getDownloadURL();
  if(imageURL != null){
    return imageURL;
  }else{
    print("Couldn't load image");
  }
}

Also you can get this image with StreamBuilder or FutureBuilder etc. for get more about FirebaseStorage check it out this documentation