💳 Card Scanner Package for Flutter

A Flutter package that allows developers to scan credit/debit cards using the device’s camera and extract card numbers and expiry dates via Google ML Kit OCR.

🚀 Features

• 📷 Uses the device camera (via camera plugin)
• 🤖 Optical Character Recognition (OCR) powered by google_ml_kit
• 🎯 Accurate extraction of:
  • Card number (16 digits)
  • Expiry date (MM/YY or MM/YYYY)
• 🔄 Automatically detects text and closes when valid data is found
• ✅ Works on both Android & iOS

📦 Installation

Add the following to your pubspec.yaml:

dependencies:
  card_scannerr:
    git:
      url: https://github.com/brightroots7/card_scannerr

Then run:
flutter pub get
🛠️ Usage
1. Import the package
import 'package:card_scannerr/card_scannerr.dart';
2. Launch the scanner
final cardDetails = await startCardScanner(context);

if (cardDetails != null) {
  print('Card Number: ${cardDetails.cardNumber}');
  print('Expiry Date: ${cardDetails.expiryDate}');
}

✅ Permissions
Android (android/app/src/main/AndroidManifest.xml)
<uses-permission android:name="android.permission.CAMERA" />
iOS (ios/Runner/Info.plist)
<key>NSCameraUsageDescription</key>
<string>This app needs camera access to scan your card.</string>
📚 Example
Here’s a basic Flutter UI example that uses the package:
ElevatedButton(
  onPressed: () async {
    final result = await startCardScanner(context);
    if (result != null) {
      print(result.cardNumber);
      print(result.expiryDate);
    }
  },
  child: Text('Scan Card'),
)
🔍 How It Works
Opens camera using camera plugin.
Streams camera frames to google_ml_kit's TextRecognizer.
Searches for card number & expiry pattern using RegEx.
Returns CardDetails and pops the scanner screen when found.
🧠 Implementation Notes
Uses CameraImage → InputImage.fromBytes() for real-time processing.
Memory-optimized using a scan flag to avoid flooding the recognizer.
You can customize or extend the logic in CardParser.