There are more complete and better designed/tested solutions you used use now.
This project was meant to show examples of how to use Google's Volley HTTP library to make requests, parse different responses and load the results into a usable POJO. The code accompanied a live talk about dealing with HTTP requests in an Android application at the time for the Sacramento GDG, which I believe has been migrated to https://gdg.community.dev/gdg-sacramento/