LetsChat is a Sample Messaging Android application built to demonstrate the use of Modern Android development tools - (Kotlin, Coroutines, Dagger-Hilt, Architecture Components, MVVM, Room, Coil) and Firebase

• Create a firebase project and replace the google-services.json file which you get from your firebase project console
• Following firebase services need to be enabled in the firebase console
  • Phone Auth
  • Cloud Firestore
  • Realtime Database
  • Storage
  • Composite indexes should be created for contact query(link for enabling indexes could be found from logcat while using the app)

You can Install and test latest LetsChat app from below 👇

• One on one chat
• Group Chat
• Typing status for one on one and group chat
• Unread messages count
• Message status for failed,sent,delivered and seen
• Supported message types
  • Text
  • Voice
  • Sticker and Gif
• Attachments
  • Image
  • Video - InProgress
• Notification actions for reply and mark as read
• Search users by username

• Kotlin - First class and official programming language for Android development.
• Coroutines & Flow - For asynchronous and more..
• Android Architecture Components - Collection of libraries that help you design quality, robust, testable, and maintainable apps.
  • Navigation Component - Handle everything needed for in-app navigation with a single Activity.
  • LiveData - Data objects that notify views when the underlying database changes.
  • ViewModel - Stores UI-related data that isn't destroyed on UI changes.
  • DataBinding - Generates a binding class for each XML layout file present in that module and allows you to more easily write code that interacts with views.Declaratively bind observable data to UI elements.
  • WorkManager - WorkManager is an API that makes it easy to schedule deferrable, asynchronous tasks that are expected to run even if the app exits or the device restarts.
  • Room - SQLite object mapping library.
• Dependency Injection -
  • Dagger-Hilt - Standard library to incorporate Dagger dependency injection into an Android application.
  • Hilt-ViewModel - DI for injecting ViewModel.
• Firebase -
  • Cloud Messaging - For Sending Notification to client app.
  • Cloud Firestore - Flexible, scalable NoSQL cloud database to store and sync data.
  • Cloud Storage - For Store and serve user-generated content.
  • Authentication - For Creating account with mobile number.
• Kotlin Serializer - Convert Specific Classes to and from JSON.Runtime library with core serialization API and support libraries with various serialization formats.
• Coil-kt - An image loading library for Android backed by Kotlin Coroutines.