How to display more than 3- levels of expandable List View?

Question

How to display more than 3- level of expandable list view, I am getting only examples for 3-Levels expandable.

Referring this :three-level-expandable-list

In

Answer 1

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) 
{
    // 999999 is a size in pixels. 
    // ExpandableListView requires a maximum height in order to do measurement calculations.
    heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

this makes much more reasonable length.