How to get value of parent node as string?

Question

So in the above data structure, I want to get value Aprilia Caponord 1200 (marked in fig.). I have Firebase reference to Aprilia (root nod

Answer 1

I met this case and solved the way as below:

final ChildEventListener countsListener = new ChildEventListener() { //for querying how many card created by each user in a specific period
            @Override
            public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
                /**
                 * $ROOT/Apirilia/Apirilia_id/CardId/IMG_URL
                 * $ROOT/Apirilia/Apirilia_id/CardId/PRICE
                 *                      ^[key] :[value]
                 */
                if (dataSnapshot == null) {
                    Logger.e("!!! dataSnapshot is null");
                    return;
                }
                String apirilia_id = dataSnapshot.getRef().getParent().getKey();
                Logger.d("... Apirilia_id:" + apirilia_id);
            }

            @Override
            public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

            }

            @Override
            public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {

            }

            @Override
            public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        };

I'm appreciated to be able to give one a hand.