title: android firebase - get childrens count
body: <p>Here is my Firebase data </p>
  
  <pre><code>{
  "ques": {
  "Chemistry": {},
  "Countries": {},
  "Film": {},
  "Geography": {},
  "General Knowledge": {},
  "Information Technology": {},
  "Physics": {},
  "Sports": {},
  "Technology": {
  "-Ki0y2ojhgAkDKVFostV": {},
  "-Ki0ySAkiILNo2WSM7EO": {},
  "-Ki1-8R-5gfHJGl9bDYC": {},
  "-Ki1-fP2HlW0ejzVOGnD": {},
  "-Ki1-vihF3xgP81UPT5t": {},
  "-Ki10DSBPWIK0SAv5v8V": {},
  "-Ki11-pLXVWZlv0XbKpp": {},
  "-Ki11al-z6_MDBdpLGh7": {},
  "-Ki11pxZvjvIl68UhVRc": {},
  "-Ki124jOsYpy9bWpc7Yo": {},
  "-Ki12oDiad-7X6UBTtBv": {},
  "-Ki133GHJeys-J0vtdI9": {},
  "-Ki13Iq62Ly_tx4tcxKa": {},
  "-Ki13e4pp1Xnq7tnYa4N": {},
  "-Ki142gU6ZHRkE34r0u3": {},
  "-Ki14GswYf_lEji5a2PX": {},
  "-Ki14WZpH5w5jnB4mZF1": {},
  "-Ki14tX__g6VdmHJHi-g": {},
  "-Ki15JghcU73RtW5zacV": {},
  "-Ki15c91cOoRoR7h5aTL": {}
  }
  }
  }
  </code></pre>
  
  <p>I want to count the number of keys available under <code>Technology</code>
  When I use the below code , gets count = 7 , but there is 20 keys available under <code>Technology</code></p>
  
  <pre><code>Query countQuery = countRef.child("ques").child("Technology");
  countQuery.addChildEventListener(new ChildEventListener() {
              @Override
              public void onChildAdded(DataSnapshot dataSnapshot, String s) {
  
  
                  questionCount = (int) dataSnapshot.getChildrenCount();
                  tQuestionNoShow.setText(""+questionCount);
  
              }
  
              @Override
              public void onChildChanged(DataSnapshot dataSnapshot, String s) {
  
              }
  
              @Override
              public void onChildRemoved(DataSnapshot dataSnapshot) {
  
              }
  
              @Override
              public void onChildMoved(DataSnapshot dataSnapshot, String s) {
  
              }
  
              @Override
              public void onCancelled(DatabaseError databaseError) {
  
              }
          });
  </code></pre>
  
  <p>So.. How to implement it??</p>