Digitizer

An Android document scanner app that uses AI to extract and digitize text from images.

Features

• Camera Capture - Take photos of documents directly
• Gallery Import - Select existing images for processing
• AI-Powered OCR - Uses Google Gemini AI for accurate text extraction
• Markdown Export - Optionally save extracted text as markdown files
• Batch Processing - Process multiple documents at once
• Smart Filenames - AI suggests appropriate filenames based on content
• Model Selection - Choose between different Gemini AI models

Screenshots

Home Screen	Processing	Results
Camera/Gallery options	AI extraction in progress	View and save extracted text

How It Works

1. Tap Camera to capture a document or Gallery to select images
2. AI processes the image and extracts text
3. Review the extracted text and markdown conversion
4. Select a target directory and customize the filename
5. Toggle "Save Markdown" if you want .md files alongside images
6. Tap Save Document to store the digitized content

Setup

API Key Configuration

This app requires a Google Gemini API key.

1. Get an API key from Google AI Studio
2. Create or edit local.properties in the project root:

   apiKey=YOUR_GEMINI_API_KEY_HERE

3. Build and run the app

The API key is automatically loaded via the secrets-gradle-plugin and never committed to version control.

Permissions

• CAMERA - Required to capture document photos
• READ_EXTERNAL_STORAGE - Required to access gallery images

Tech Stack

• Kotlin - 100% Kotlin codebase
• Jetpack Compose - Modern declarative UI
• Google Generative AI SDK - Gemini AI integration
• Material 3 - Latest Material Design components
• Secrets Gradle Plugin - Secure API key management

Requirements

• Android 9.0 (API 28) or higher
• Google Gemini API key

Installation

From Release

1. Download the latest APK from Releases
2. Install and grant camera/storage permissions
3. Note: You'll need to build from source with your own API key for full functionality

Build from Source

git clone https://github.com/sunil-dhaka/Digitizer.git
cd Digitizer
# Add your API key to local.properties
echo "apiKey=YOUR_GEMINI_API_KEY" >> local.properties
./gradlew assembleDebug

Project Structure

app/src/main/java/com/example/digitizer/
    MainActivity.kt           # Entry point
    DocumentScannerScreen.kt  # Main UI composable
    BakingViewModel.kt        # AI processing logic
    UiState.kt                # UI state definitions
    FilePicker.kt             # File/directory selection
    PermissionHandler.kt      # Runtime permissions
    ui/theme/                 # Material 3 theming

AI Models

The app supports multiple Gemini models:

• Gemini 1.5 Flash - Fast processing (recommended)
• Gemini 1.5 Pro - Higher accuracy for complex documents
• Gemini 2.0 Flash - Latest model with improved capabilities

License

MIT License - feel free to use, modify, and distribute.

Author

Built with Jetpack Compose by sunil-dhaka