Collect All Data From Firebasedatabse And Call Notifydatasetchanged() Once

Question

in brief: I have a list of users ID and I want to iterate over database and find profiles of those users and put them on the list. But I have a problem as follows: final List

Solution 1:

You can simply count how many you've already loaded, and then call notifyDataSetChanged() only once you've loaded the last one:

final List<Friend> friendsProfiles = new ArrayList<>();
for (final FriendId friendId : friendIds) {
    mUserRef.child(friendId).addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            // Get the friend profile
            Friend friend = dataSnapshot.getValue(Friend.class);
            // Add to the list
            friendsProfiles.add(friend);

            if (friendsProfiles.size() == friendIds.length) {
                mFriendsFragment.loadNewData(friendsProfiles);
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {
            throw databaseError.toException(); // don't ignore errors, as they break the logic of your app
        }
    });
}

accessories-cc4u

Collect All Data From Firebasedatabse And Call Notifydatasetchanged() Once

Solution 1:

Post a Comment for "Collect All Data From Firebasedatabse And Call Notifydatasetchanged() Once"

Widget HTML #3