Speech-to-Text Android App

A modern Android application built with Jetpack Compose that converts speech to text in real-time using Android's SpeechRecognizer API.

Features

• Real-time speech recognition with partial results
• Modern Material Design 3 UI
• Animated microphone button with visual feedback
• Error handling with user-friendly messages
• Clear and intuitive interface
• Permission handling for microphone access

Setup

1. Clone or download the project
2. Open in Android Studio
3. Sync Gradle files
4. Run on your device or emulator

Architecture

The app follows modern Android development practices:

• MVVM Architecture - Separation of concerns with ViewModel
• Jetpack Compose - Declarative UI framework
• StateFlow - Reactive state management
• Kotlin Coroutines - Asynchronous operations

Key Components

SpeechToText Interface

Defines the contract for speech recognition functionality with:

• text: StateFlow<String> - Recognized text stream
• isListening: StateFlow<Boolean> - Listening state
• error: StateFlow<String?> - Error messages
• start(), stop(), destroy() - Control methods

RealSpeechToText Implementation

Handles Android SpeechRecognizer API:

• RecognitionListener callbacks
• Partial and final results processing
• Comprehensive error handling
• Intent configuration for optimal recognition

MainViewModel

Manages application state:

• Initializes and coordinates speech recognition
• Exposes StateFlows for UI observation
• Handles lifecycle and cleanup

MainActivity (Compose UI)

• Permission handling
• Animated UI components
• Status indicators
• Error display with dismissal

Usage

1. Launch the app
2. Grant microphone permission when prompted
3. Tap the microphone button to start listening
4. Speak clearly into the microphone
5. View real-time transcription on screen
6. Tap again to stop listening
7. Use "Clear" button to reset text

Error Handling

The app handles various speech recognition errors:

• Audio recording errors
• Network connectivity issues
• No speech detected
• Permission issues
• Service unavailability

Troubleshooting

Speech recognition not available:

• Ensure Google app is installed and updated
• Check internet connection
• Verify device has microphone

Permission denied:

• Go to Settings > Apps > [App Name] > Permissions
• Enable microphone permission

No results:

• Speak louder and clearer
• Check microphone is not blocked
• Ensure quiet environment