java - How can I get node name while I am using orderByChild in Firebase? -

here's code:

@override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {      query queryref  = mdatabase.child("users").orderbychild("age");     queryref.addvalueeventlistener(new valueeventlistener() {         @override         public void ondatachange(datasnapshot snapshot) {             (datasnapshot chatsnapshot: snapshot.getchildren()) {                 user users = chatsnapshot.getvalue(user.class);                 string name = users.getname();                 system.out.println(name);             }         }          @override         public void oncancelled(databaseerror databaseerror) {          }     });        // inflate layout fragment     return inflater.inflate(r.layout.fragment_home, container, false); } 

as guys guessed, code displaying users name. want is, based on same query result, want display user ids,not name. tried using class user id:

public class user{ private string gender; private long age; private string email; private long height; private long weight; private string name; private string type; private string userid;  public user() {  } public user(string gender,long age,string email,long height,long weight,string name,string type,string userid) {     this.gender=gender;     this.age=age;     this.email=email;     this.height=height;     this.weight=weight;     this.name=name;     this.type=type;     this.userid = firebaseauth.getinstance().getcurrentuser().getuid(); }  public string getid() {     return userid; }  public string getgender() {     return gender; }  public long getage() {     return age; }  public string getemail() {     return email; }  public long getheight() {     return height; }  public long getweight() {     return weight; }  public string getname() {     return name; }  public string gettype() {     return type; }} 

but returned current users id 3 times, since i've 3 users in db, not individual user ids. here's db:

each user have many values

another method tried using getkey() this:

@override public view oncreateview(layoutinflater inflater, viewgroup container,                      bundle savedinstancestate) {  query queryref  = mdatabase.child("users").orderbychild("age"); queryref.addvalueeventlistener(new valueeventlistener() {     @override     public void ondatachange(datasnapshot snapshot) {         (datasnapshot chatsnapshot: snapshot.getchildren()) {             string name = snapshot.getkey();             system.out.println(name);         }     }      @override     public void oncancelled(databaseerror databaseerror) {      } });        // inflate layout fragment return inflater.inflate(r.layout.fragment_home, container, false); } 

but returned node 'users' 3 times, not user ids.

can me this? want display user ids.that is, these:

ombaciwg3fourxy8seqqd8taql12, kzllc0gl1vfbitt73whwwjuxvxc2, lxvykdo9gqrcfmb0u1qz0wcc9lg2 (based on picture)

any highly appreciated. thank you.

you calling getkey() method @ wrong datasnapshot. want

@override public void ondatachange(datasnapshot snapshot) {     (datasnapshot chatsnapshot: snapshot.getchildren()) {         string key = chatsnapshot.getkey();         system.out.println(key);     } } 

edit: set userid user class

for (datasnapshot chatsnapshot: snapshot.getchildren()) {     user user = chatsnapshot.getvalue(user.class);     user.setuserid(chatsnapshot.getkey()); }