Apps How to give each node unique name ?

[android_01]

I want to display a tree having the individual name of its parent, second node, and its child nodes.This code display tree has all second and child nodes with the same names. How can I give an unique name to each node of a tree?

 

[android_01]

I've coded by using :
http://www.allappsdevelopers.com/TopicDetail.aspx?TopicID=c991d70a-4570-4e4b-8378-2191a4247a84