Voice Command AI 🎙️☕

A premium Flutter application that demonstrates a fully hands-free voice command interface. Designed for high-end user experiences, it allows users to place orders (like coffee) using natural voice interaction, powered by a sophisticated state machine.

✨ Features

• Wake Word Detection: Activated by "Hey Bad" using Picovoice Porcupine.
• Natural Voice Ordering: Uses Speech-to-Text (STT) for capturing complex commands.
• Voice Feedback: Uses Text-to-Speech (TTS) for order confirmation and status updates.
• Interactive UI: Features premium aesthetics with AvatarGlow, custom animations, and Google Fonts (Inter).
• State Machine Architecture: Handles transitions between Idle, Listening, and Confirming states seamlessly.
• Local Notifications: Provides visual feedback for placed orders.
• Scalable Infrastructure: Clean Architecture with dependency injection using GetIt.

🚀 Getting Started

Prerequisites

• Flutter SDK
• Android Studio / VS Code
• Picovoice AccessKey (Free Tier)

Installation

1. Clone the repository:

   git clone https://github.com/your-username/voice-command-ai.git
   cd voice-command-ai

2. Install dependencies:

   flutter pub get

3. Configure AccessKey: Open lib/core/constants/app_constants.dart and replace the picovoiceAccessKey with your own key from the Picovoice Console.

4. Run the app:

   flutter run

🛠️ Project Structure

lib/
├── core/
│   ├── constants/       # App-wide constants & API keys
│   └── services/        # Service layer (STT, TTS, WakeWord, Notifications)
├── models/              # Data models (OrderModel)
├── presentation/
│   ├── screens/         # UI Screen layers (Home, All Orders)
│   └── widgets/         # Reusable UI components
└── injection_container.dart # Dependency Injection setup

📱 Release Configuration (Android)

To ensure the wake word detection works in production (Release Mode), specialized configurations are included:

• Proguard Rules: Specific rules in android/app/proguard-rules.pro to prevent the Picovoice SDK from being stripped or obfuscated.
• Resource Optimization: Custom aaptOptions in build.gradle.kts to ensure .ppn files (wake word models) are not compressed.
• Shrinking Settings: isShrinkResources is disabled in release builds to protect native library dependencies.

Important

When building for release, ensure you run flutter clean before flutter build apk --release to apply the latest Proguard rules.

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

📄 License

This project is licensed under the MIT License.