🚀 AdvAuth – Advanced Android Authentication App

AdvAuth is a production-ready Android authentication application built using Java, XML, MVVM Architecture, and Firebase Authentication.

This project demonstrates how real-world Android apps implement secure and scalable authentication systems including Email/Password login, Google Sign-In, and Phone OTP verification.

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Perfect for: • Beginners
• College students
• Android developers
• Anyone who wants to understand production-level authentication systems

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📱 Features

✅ Splash Screen & Onboarding UI
✅ Email & Password Login & Signup
✅ Google Authentication Integration
✅ Phone Number OTP Verification
✅ Forgot Password Flow
✅ Profile Screen with Image Update
✅ Logout Functionality
✅ Firebase Authentication Integration
✅ MVVM Architecture
✅ Clean & Scalable Folder Structure

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🏗 Tech Stack

• Java
• XML (Android Views)
• MVVM Architecture
• Firebase Authentication
• Firebase Realtime Database / Firestore
• Glide (for image loading)
• Android Studio

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🔐 Authentication Methods Implemented

📧 Email & Password

• Secure registration
• Input validation
• Error handling
• Persistent login session

🔵 Google Sign-In

• One-tap Google login
• Firebase credential linking
• Seamless account management

📱 Phone OTP Verification

• SMS-based authentication
• Firebase PhoneAuthProvider
• Auto OTP detection (if supported)

🔄 Password Reset

• Forgot password via email
• Secure token-based reset

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🏛 Architecture Overview

This project follows MVVM (Model-View-ViewModel) architecture:

• Model → Handles Firebase operations
• View → XML layouts
• ViewModel → Business logic & LiveData handling
• Repository Pattern for clean separation

This ensures scalability, testability, and clean code organization.

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📂 Project Structure

com.advauth │ ├── ui │ ├── auth │ ├── profile │ ├── onboarding │ ├── viewmodel ├── repository ├── model ├── utils

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⚙ Setup Instructions

1. Clone the repository
2. Open in Android Studio
3. Connect Firebase to the project
4. Enable:
   - Email/Password Authentication
   - Google Sign-In
   - Phone Authentication
5. Add your `google-services.json`
6. Run the project 🚀

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🎯 Learning Outcomes

By completing this project, you will understand:

• How to implement secure authentication systems
• How Firebase Authentication works
• How to manage user sessions
• How to structure Android apps using MVVM
• How production-level authentication flows are built

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🌍 Use Cases

• Resume Project
• Final Year College Project
• Hackathon Submission
• Production App Starter Template

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🤝 Contributing

Contributions are welcome to improve features and performance.

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⭐ Support

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