Talkio

Talkio is a real-time messaging app built with Flutter and Firebase. It enables private one-on-one chats, features auto-generated avatars, real-time typing indicators, push notifications, and provides a clean, modern user experience.

Features

• Firebase Authentication
• Private 1-to-1 chat system
• Auto-generated avatars based on user UID
• Typing status indication in real time
• Real-time message updates with Firestore
• Search bar to filter messges
• Responsive and modern chat UI
• Real-time notifications for new messages

Screenshots

Technologies

• Flutter
• Firebase CLI
• Firebase (Auth, Firestore, FCM, Functions)
• Provider

Project Structure

lib/
├── app/             # App configuration and main setup
├── components/      # Reusable UI widgets
├── controllers/     # Business logic and state management
├── errors/          # Custom error classes and handlers
├── middlewares/     # Request/response interceptors or guards
├── modals/          # Modals and bottom sheets
├── models/          # Data models and entities
├── providers/       # Dependency injection and global providers
├── screens/         # UI screens and views
├── services/        # External services and APIs (e.g., Firebase)
├── utils/           # Utility functions and helpers
└── validators/      # Input validators and schemas

Installation

git clone https://github.com/DanielArndt0/Talkio.git
cd talkio
flutter pub get
flutter run --dart-define-from-file=env/env.local.json

⚠️ Make sure to include your Firebase google-services.json in android/app/ and your environment config in env/env.local.json.

env.local.json Structure

{
  "androidApiKey": "androidApiKey",
  "androidAppId": "androidAppId",
  "iosApiKey": "iosApiKey",
  "iosAppId": "iosAppId",
  "iosBundleId": "iosBundleId",
  "projectId": "projectId",
  "storageBucket": "storageBucket",
  "messagingSenderId": "messagingSenderId"
}

Build

flutter build apk --release --dart-define-from-file=env/env.local.json

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Generating Keystore and Production Certificates

Generate a Keystore

Use the command below to generate your production keystore file (upload-keystore.p12):

keytool -genkey -v -keystore upload-keystore.p12 \
  -storetype PKCS12 -keyalg RSA -keysize 2048 -validity 10000 \
  -alias upload

You will be prompted to enter your name, organization, and keystore password.

Get SHA1 / SHA256 fingerprints Run this to retrieve your certificate fingerprints (required by Firebase):

keytool -list -v -keystore upload-keystore.p12 -alias upload -storetype PKCS12

Generating SHA-1 and SHA-256 for Debug

To generate your app’s debug and release certificate fingerprints (SHA-1 and SHA-256), use the following command from the android/ directory:

🔧 For Debug (Default keystore)

./gradlew signingReport

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Versions

Tool	Version
Flutter	3.29.2 stable
Dart	3.7.2 stable
Java	>= 11
Android SDK	35
targetSdkVersion	35
minSdkVersion	21
Android NDK	27.0.12077973
Gradle	8.10.2
Kotlin	1.9.24
Groovy	3.0.22

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Author

@DanielArndt0