android firebase - get childrens count

Question

Here is my Firebase data

{
\"ques\": {
\"Chemistry\": {},
\"Countries\": {},
\"Film\": {},
\"Geography\": {},
\"General Knowledge\": {},
\"Information Techn         


        

Answer 1

  Firebase.setAndroidContext(this);
  DatabaseReference fbDb = null;
  if (fbDb == null) {
      fbDb = FirebaseDatabase.getInstance().getReference();
  }


  fbDb.child("ques/Technology")
      .addListenerForSingleValueEvent(new ValueEventListener() {
           @Override
           public void onDataChange(DataSnapshot dataSnapshot) {
               // get total available quest
                int size = (int) dataSnapshot.getChildrenCount();
            }
            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });