Retrieve multiple photos under a node from Firebase Storage

Question

I have a CollectionView that I am using images from Firebase Storage to fill. I store the images under \'userId\' node. I want to check the files existence in bulk that are

Answer 1

I don't know if this is what you want, but i figured out an easy way of uploading multiple files into the firebase storage and get their respective download urls.

  private void uploadPosts(final ArrayList mediaUris) {

        StorageReference fileRef = storageRef.child("users").child(Objects.requireNonNull(mAuth.getCurrentUser()).getUid()).child("posts").child(key).child("file_" + index);
        File mediaFile = new File(mediaUris.get(index));


        final UploadTask uploadTask = fileRef.putFile(Uri.fromFile(mediaFile));
        uploadTask.addOnSuccessListener(new OnSuccessListener() {
            @Override
            public void onSuccess(final UploadTask.TaskSnapshot taskSnapshot) {
                fileRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener() {
                    @Override
                    public void onSuccess(Uri uri) {

                        Log.d(TAG,"URL = "+uri); //url of each file

                        if(index < mediaUris.size()) {
                            index++;
                            uploadPosts(mediaUris); //Recursion
                        }

                    }
                });
            }

        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(getApplicationContext(), "Upload failed", Toast.LENGTH_SHORT).show();
                Log.e(TAG,"Failed "+e.getCause());
            }

        });

    }