title: How get value from dataSnapshot?
body: <p>When I debug this code, in databaseUser dataSnapshot has the values from User in database, but in the object <code>user1</code>, did not add, it's all null. And I don't understand, because in the object event receives values normally.</p>
  
  <pre><code>databaseEvent.child(getKeyEvent()).addListenerForSingleValueEvent( 
        new ValueEventListener() {
              @Override
              public void onDataChange(DataSnapshot dataSnapshot) {
  
                 final Event event = dataSnapshot.getValue(Event.class);
                 user = FirebaseAuth.getInstance().getCurrentUser();
                 if(user != null) {
  
                     databaseUser.orderByChild("userEmail").equalTo(user.getEmail()).addListenerForSingleValueEvent(new ValueEventListener() {
                       @Override
                       public void onDataChange(DataSnapshot dataSnapshot) {
                           if (dataSnapshot.exists()) {
                               //User already exists
                               User user1 = dataSnapshot.getValue(User.class);
                }
         }
  });
  </code></pre>
  
  <p>My Database User, only for test for now:</p>
  
  <pre><code>public class User {
  
  String userId;
  String userEmail;
  Boolean userHasInterest;
  String eventId;
  
  public String getUserId() {
      return userId;
  }
  public String getUserEmail() {
      return userEmail;
  }
  
  public Boolean getUserHasInterest() {
      return userHasInterest;
  }
  
  public String getEventId() {
      return eventId;
  }
  
  public User(String userId, String eventId, String userEmail, Boolean userHasInterest) {
      this.userId = userId;
      this.userEmail = userEmail;
      this.userHasInterest = userHasInterest;
      this.eventId = eventId;
  }
  </code></pre>
  
  <p>And the method, just to pick the key of the event of another activity :</p>
  
  <pre><code>public String getKeyEvent(){
      Intent intent = getIntent();
      Bundle bundle = intent.getExtras();
      String key = bundle.getString("Evento");
      return key;
  } 
  </code></pre>