Authentication

Firebase gives your Android app superpowers. User authentication in minutes. Crash reports that show exactly what happened. Analytics that track user behavior. Feature flags that let you change app behavior without an update. In this tutorial, you will integrate the most important Firebase services into your Android app — Authentication, Crashlytics, Analytics, Remote Config, Cloud Messaging, and App Check. Prerequisites: You should have a working Android app with Hilt. See Android Tutorial #2: Hilt if needed. ...

Your API has registration and login with email and password. But many users prefer to sign in with their Google account. It is faster and they do not need to remember another password. In this tutorial, you will add Google Sign-In using OAuth 2.0. You will learn how the OAuth flow works, how to handle the callback, and how to link OAuth accounts with existing email accounts. How OAuth 2.0 Works OAuth 2.0 is a protocol that lets users sign in with a third-party provider (Google, GitHub, etc.) without sharing their password with your application. ...