init method
Implementation
Future<void> init() async {
_scanner?.close();
_controller?.dispose();
_scanner = BarcodeScanner(formats: formats);
_cameras = await availableCameras();
_camera = _cameras?.firstOrNull;
_controller = CameraController(
_camera!,
ResolutionPreset.high,
enableAudio: false,
);
await _controller?.initialize();
_isCameraInitialized = true;
notifyListeners();
_flagging();
}