vietqr_widget 0.1.1+3

A Flutter UI widget to display VietQR codes. Built on top of vietqr_encode.

VietQR Widget

Language: English | Tiếng Việt

A Flutter UI widget to display VietQR codes. Built on top of vietqr_core for encoding and pretty_qr_code for rendering beautiful QR codes.

Features

• Easy to use – Simple Flutter widget for displaying VietQR codes
• Customizable – Support for background colors and embedded images
• Error handling – Built-in error handling with customizable error widgets
• Auto-encoding – Automatically encodes VietQR data using vietqr_core
• Responsive – Adapts to different screen sizes and orientations
• Type-safe – Full Flutter and Dart type safety

If you want to say thank you, star us on GitHub or like us on pub.dev.

Usage

First, follow the package installation instructions and add a VietQrWidget widget to your app:

Basic Example

VietQrWidget(
  data: VietQrData(
    bankBinCode: SupportedBank.vietcombank,
    bankAccount: '0123456789',
    amount: '50000',
    merchantName: 'John Doe',
    merchantCity: 'Ho Chi Minh City',
    additional: const AdditionalData(
      purpose: 'Payment for invoice #12345',
    ),
  ),
)

Example with Embedded Image

VietQrWidget(
  data: VietQrData(
    bankBinCode: SupportedBank.techcombank,
    bankAccount: '0123456789',
    merchantName: 'Coffee Shop ABC',
    merchantCity: 'Hanoi',
    additional: const AdditionalData(
      purpose: 'Coffee payment',
    ),
  ),
  background: Colors.white,
  embeddedImage: EmbeddedImage(
    scale: 0.2,
    image: AssetImage('assets/logo.png'),
  ),
  errorBuilder: (context, error, stackTrace) {
    return Icon(
      Icons.error_outline,
      color: Colors.red,
      size: 48,
    );
  },
)

Error Handling

The widget includes built-in error handling for VietQR encoding errors:

VietQrWidget(
  data: myVietQrData,
  errorBuilder: (BuildContext context, Object error, StackTrace? stackTrace) {
    if (error is VietQrException) {
      return Container(
        padding: EdgeInsets.all(16),
        decoration: BoxDecoration(
          color: Colors.red.shade50,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(Icons.error_outline, color: Colors.red),
            SizedBox(height: 8),
            Text(
              'QR Code Error',
              style: TextStyle(
                fontWeight: FontWeight.bold,
                color: Colors.red,
              ),
            ),
            Text(error.message),
          ],
        ),
      );
    }
    return Icon(Icons.error_outline, color: Colors.red);
  },
)

VietQR Data

This widget uses the VietQrData class from vietqr_core. For detailed information about creating and configuring VietQR data, please refer to the vietqr_core documentation.

Quick VietQR Data Example

// Static QR with fixed amount
final staticQr = VietQrData(
  bankBinCode: SupportedBank.vietcombank,
  bankAccount: '0123456789',
  amount: '100000', // 100,000 VND
  merchantName: 'My Store',
  merchantCity: 'Ho Chi Minh City',
);

// Dynamic QR where user enters amount
final dynamicQr = VietQrData(
  bankBinCode: SupportedBank.techcombank,
  bankAccount: '9876543210',
  merchantName: 'My Store',
  merchantCity: 'Hanoi',
  // No amount specified - user will enter when scanning
);

Example App

For a complete example with interactive QR code generation, check out the example directory in this package.

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request