It is a simple chat app made with Java in Android Studio which uses Firebase as a database.
First, fork the FlashChat repository so that you can make a pull request. Then, clone your fork locally:
git clone https://github.com/[your-github-account]/FlashChat.git
Occasionally you will want to merge changes in the upstream repository (the official code repo) with your fork.
cd FlashChat
git checkout master
git pull https://github.com/amanaggarwal1/FlashChat.git master
Manage any merge conflicts, commit them, and then push them to your fork.
Just run the code in android studio.