databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {

                for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
                    Upload upload = dataSnapshot.getValue(Upload.class);
                    upload.setmImageUrl(upload.getmImageUrl().getDownloadUrl().toString()); // added this line
                    mUploads.add(upload);
                }
                Toast.makeText(getActivity(), "Success", Toast.LENGTH_SHORT).show();

                //notify the adapter
                postsAdapter.notifyDataSetChanged();
            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {
                Toast.makeText(getActivity(), "Failiur", Toast.LENGTH_SHORT).show();
            }
        });