How to iterate through a Firebase structure in Android?
<p>I want to create a function that iterates through a firebase structure looking like this: </p>

<pre><code>{
   "users":{
      "7e122736-2dd4-4770-a360-a0e7cbe41a43":{
         "currentLatitude":46.6598714,
         "currentLongitude":23.5637339,
         "displayName":"gjsj2",
         "email":"2@vlad.com",
         "password":"123"
      },
      "a09e7e1d-ad3a-4d21-b0ba-069e0999bb93":{
         "currentLatitude":47.6599014,
         "currentLongitude":23.5636797,
         "displayName":"gjsj",
         "email":"1@vlad.com",
         "password":"123"
      },
      "abc29286-fd6d-4088-95da-759828b5835d":{
         "currentLatitude":50.6599043,
         "currentLongitude":23525.5637188,
         "displayName":"gjsj3",
         "email":"3@vlad.com",
         "password":"123"
      }
   }
}
</code></pre>

<p>I want to create a function that takes every unique user id's child and uses his coordinates to create a marker on a google maps map. Here's what i got so far but it doesnt seem to be working : </p>

<pre><code>public void onChildChanged(DataSnapshot snapshot, String s) {
    for (DataSnapshot userSnapshot : snapshot.getChildren()) {
        for (DataSnapshot uniqueUserSnapshot : userSnapshot.getChildren()) {
            Users currentUser = uniqueUserSnapshot.getValue(Users.class);

            MarkerOptions options = new MarkerOptions()
                    .title(currentUser.getEmail())
                    .icon(BitmapDescriptorFactory.defaultMarker(getRandomNumberInRange(0, 360)))
                    .position(new LatLng(currentUser.getCurrentLatitude(), currentUser.getCurrentLongitude()));
            mMap.addMarker(options);
            Toast.makeText(MainActivity.this, "fsafasfasfas", Toast.LENGTH_SHORT).show();
        }
    }
}
</code></pre>

<p>And here's my Users POJO: </p>

<pre><code>package com.licenta.vladut.mmap;

public class Users {
    String email;
    String displayName;
    String password;
    double currentLatitude;
    double currentLongitude;


    public Users() {
    }

    public Users(String email, String displayName, String password, double currentLongitude, double currentLatitude) {
        this.email = email;
        this.displayName = displayName;
        this.password = password;
        this.currentLongitude = currentLongitude;
        this.currentLatitude = currentLatitude;
    }

    public Users(String email, String displayName, String password) {
        this.email = email;
        this.displayName = displayName;
        this.password = password;
    }

    public String getDisplayName() {
        return displayName;
    }

    public String getEmail() {
        return email;
    }

    public String getPassword() {
        return password;
    }

    public double getCurrentLongitude() {
        return currentLongitude;
    }

    public double getCurrentLatitude() {
        return currentLatitude;
    }
}
</code></pre>