title: How to count children in Firebase Database (Android)
body: <p>I need to count all the children that are in my Firebase database.</p>
  
  <p>This is the Firebase structure:</p>
  
  <p><code>Level 1
   - CHILD1
   - - subchild1
   - - subchild2
   - CHILD2
   - - subchild 1</code></p>
  
  <p>How can I count the CHILDs from level 1? 
  (In this example it would need to return 2...)</p>