Offline Chat App

An Android application that showcases offline chat through the usage of RoomDB along with Jetpack Compose UI.

Features

The Android app lets you:

• User Authentication - Register & Login using username and password.
• Chat History, where you can see all your conversations with other registered users.
• Messaging, where you can chat with the other registered users along with media (video & image) support.
• Echo Last Message, where the last message sent by the user will be echoed from the recipient end.
• Offline Support

DB Schema

Screenshots

Tech stack

• Minimum SDK level 24
• Kotlin based + Coroutines for asynchronous.
• Dagger-Hilt for dependency injection.
• JetPack
  • State - Notify domain layer data to views.
  • SharedFlows - Notify one-time events to the UI layer.
  • Lifecycle - Dispose of observing data when the lifecycle state changes.
  • ViewModel - UI-related data holder, lifecycle aware.
  • Compose - Render UI.
• Architecture
  • MVVM Architecture (Model - View - ViewModel)
  • Repository pattern
  • data ~ domain ~ presentation
• Glide - Compose - Loading Images for Jetpack Compose.
• ExoPlayer - Loading Video Playback
• DataStore - For handling shared preferences
• Room Database - For offline caching of data