User authentication in Android apps can be implemented using Firebase Authentication or custom backend services. With Firebase Authentication, you can integrate email/password login, social media logins (Google, Facebook), and phone number authentication using the Firebase SDK. For custom backend services, you typically use RESTful APIs with JSON Web Tokens (JWT) for secure token-based authentication. Implementing OAuth for third-party logins is another common method. Ensure secure storage of user credentials using encrypted SharedPreferences or the Android Keystore system.
For further reading and additional tips on Android app development, visit the following resource: https://www.smartinfosys.net/blog/android-app-development-quick-tips-for-new-developers/
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