How to build a chat application in Flutter with Firebase

The article outlines the process of developing a chat application using Flutter with Firebase as the backend, detailing the steps involved in integrating Firebase services like Cloud Firestore, Firebase Storage, and Firebase Authentication. It starts by creating a new Flutter project and connecting it to Firebase, followed by building a user interface that includes a splash page, login page with Google Sign-In, homepage displaying user contacts, profile page for user information updates, and a chat page for messaging. The text explains how to configure Firebase for both Android and iOS platforms, incorporating OAuth 2.0 credentials and managing user authentication and data storage. The article concludes with instructions on deploying the app as a Progressive Web App (PWA) using Firebase Hosting, providing a comprehensive understanding of developing a functional chat app while highlighting the simplicity and efficiency brought by FlutterFire and Dart CLI tools.