Share the tutorial on using expandablelistview control in Android

This article uses a demo to show the use of expandablelistview control in Android, such as how to bind data sources in group / child listviews. The direct code is as follows: program structure diagram:

The source code of the main.xml file in the layout directory is as follows:

The source code of contactsactivity.java in package com.andyidea.demo is as follows:

Finally, the screenshot after the program runs is as follows:

I hope this article will help you learn Android Software Programming.