Every item on our Tree is a TreeNode, and you can use the default one or create your own custom tree node if needed.
To create a Default Tree Node
TreeNode node = new TreeNode(value, R.layout.list_item);Once it created it will be at level 0 with no children and no parent.
Maybe in some cases you want to create a custom TreeNode, all you need is to create a class that extend it and add your own functions and variables, please check the log example for practical example.
public class CustomTreeNode extends TreeNode {
public CustomTreeNode(Object value, int layoutId) {
super(message, layoutId);
}
}TreeNode has many method to set and get values
To add new child
treeNode.addChild(TreeNode child)Change the value
treeNode.setValue(Object value);Get the current value
Object value = treeNode.getValue();Get the node parent
TreeNode parent = treeNode.getParent();To make the node expanded or collapsed
treeNode.setExpanded(isExpanded);Check if it expanded
boolean isExpanded = treeNode.isExpanded();Check if it selected or not
boolean isSelected = treeNode.isSelected();Get the node level
int level = treeNode.getLevel();