Recover the amount of children who have a knot

Question

How do I recover the amount of children you have in a knot?

I already have the right path, I just need to know how to count the children of this knot.

private DatabaseReference qtdeFilRef;    
qtdeFilhosRef.child("primeiroNo").child("segundoNo");

Does anyone know how to get the kids back from "second"?

Answer 1

Your question has been answered.

https://stackoverflow.com/questions/48645172/how-to-get-count-of-nested-nodes-of-a-parent-node-in-firebase

I tested here and this code below was the one that best served me.

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference yourRef = rootRef.child("Authenticated-Users");
ValueEventListener eventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        int count = 0;
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
            count = count + 1;
        }
        Log.d("TAG", count + "");
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
yourRef.addListenerForSingleValueEvent(eventListener);