Firebase Services Used
TicTacToe game for Android with online multiplayer, built using Java and the Firebase platform. This project was originally created as a Final Project for the ironSource Android Summer Camp (2017) and has been expanded with additional features.
- Real-time Online Multiplayer: Play against friends or other users live.
- Firebase Authentication: Secure user login and registration.
- Player Lobby & Matching: Find other users and send/receive game invitations.
- Live Game State Sync: Game moves are reflected instantly on both players' devices.
- Multilanguage Support: Full localization for English, Hebrew, and Arabic, including Right-to-Left (RTL) layout support.
- Push Notifications for Invites: Receive real-time game invitations via Firebase Cloud Messaging (FCM), even when the app is in the background.
This project leverages a full Java + Firebase stack to create a real-time, serverless multiplayer experience.
- Language: Java
- Platform: Android (Native)
- IDE: Android Studio
- UI: XML Layouts (with support for RTL languages)
- Firebase Authentication: Manages all user sign-up and login sessions.
- Firebase Realtime Database: Used for low-latency synchronization of game state. All active game moves (X's and O's, current turn) are written here to be streamed to opponent devices instantly.
- Firebase Firestore Database: Used for more structured, persistent data such as user profiles, friends lists, and game history.
- Firebase Cloud Functions: Used for sending push notifications for game invites.
This project strategically uses both Firebase Realtime Database and Firestore.
- Realtime Database was chosen for the active game board synchronization due to its extremely low latency, making it ideal for real-time events.
- Firestore was chosen for storing user profiles, game statistics, and match history due to its powerful querying capabilities and more structured data model.
- Real-time Data Sync: Implementing a stable, real-time game state synchronization between two clients using Firebase Realtime Database.
- Complex State Management: Managing the game logic (turn handling, win/draw detection, disconnects) reliably.
- Firebase Integration: Learning to integrate multiple Firebase services (Auth, RTDB, Firestore, Functions) into a single, cohesive application.
- Localization (i18n): Implementing full internationalization, including the specific challenges of supporting Right-to-Left (RTL) languages like Hebrew and Arabic across all UI components.
- Asynchronous Programming: Handling callbacks and listeners from Firebase to update the UI without blocking the main thread.