ultra_qr_scanner 3.0.5

Ultra-fast, low-latency QR code & Barcode scanner plugin for Flutter with native performance optimization.

Changelog

⚠️ Recommendation: Always use the latest version. Versions below 3.0.4 contain critical bugs on iOS (blank preview, camera freeze, hot restart crash). Versions below 3.0.5 have a blank preview issue on Android when navigating back. Upgrading to the latest version is strongly advised.

3.0.5

• Fix Android blank preview on navigate back: When navigating away and returning to the scanner screen, Flutter recreates the AndroidView with a new PreviewView. The CameraX Preview surface is now reconnected to the new view via reconnectPreviewSurface(), preventing a blank camera preview.

3.0.4

• Fix iOS camera preview blank screen: Camera session now starts immediately on prepareScanner so preview appears without requiring the user to press Start Scan
• Fix iOS camera switch freeze: Platform view now receives a notification when the preview layer changes (front/back switch) and swaps the layer instantly — no more frozen frame
• Fix preview layer frame: Added layoutSubviews override to CameraContainerView so the preview layer resizes correctly from CGRect.zero to the real widget size
• Fix hot restart crash: Added disposeScanner method that fully shuts down the native AVCaptureSession; widget dispose() now calls it so the native session is cleaned up before recreation
• Fix flash button on front camera: Flash toggle button is now hidden when the front camera is active; switching to front camera with flash on automatically turns it off

3.0.3

• Support Google 16KB Page size: Support Google 16KB Page size
• Fix Ios scanning error: Fix Ios scanning error

3.0.2

• New Readme update: add and update readme for more clear documentation

3.0.0

• MAJOR RELEASE: Added comprehensive barcode scanning support
• Auto-Detection: Automatically detects and scans both QR codes and barcodes without mode switching
• Multi-Format Support: Added support for 12 additional barcode formats:
  • Code 128, Code 39, Code 93
  • EAN-13, EAN-8, UPC-A, UPC-E
  • Codabar, ITF, PDF417, Data Matrix, Aztec
• Type Detection: New callback signature onCodeDetected(String code, String type) returns format type
• Enhanced Native Performance: Same ultra-fast scanning for all formats using MLKit (Android) and Vision (iOS)
• Backward Compatible: Existing QR-only code continues to work with legacy onQrDetected callback
• Visual Enhancements:
  • Dynamic scanning frame colors based on detected format
  • Format type indicators in default overlay
  • Auto-detection status display
• New API Methods:
  • scanStreamWithType() - Stream with type information
  • scanOnceWithType() - Single scan with type

2.1.0

• Initial release of ultra_qr_scanner
• Ultra-fast QR code scanning with native performance
• Support for both Android (CameraX + MLKit) and iOS (AVCapture + Vision)
• Features:
  • Preload scanner for instant startup
  • Background processing threads
  • Frame throttling for battery efficiency
  • Auto-stop on detection
  • Flash toggle support
  • Pause/resume detection
  • Stream and single-scan modes