开源软件名称（OpenSource Name）：juliansteenbakker/mobile_scanner开源软件地址(OpenSource Url)：https://github.com/juliansteenbakker/mobile_scanner开源编程语言(OpenSource Language)：Dart 54.4%开源软件介绍(OpenSource Introduction)：mobile_scanner
A universal barcode and QR code scanner for Flutter based on MLKit. Uses CameraX on Android, AVFoundation on iOS and Apple Vision & AVFoundation on macOS. Platform Support
AndroidSDK 21 and newer. Reason: CameraX requires at least SDK 21. Also, make sure you upgrade kotlin to the latest version in your project. This packages uses the bundled version of MLKit Barcode-scanning for Android. This version is more accurate and immediately available to devices. However, this version will increas the size of the app with approximately 3 to 10 MB. The alternative for this is to use the unbundled version of MLKit Barcode-scanning for Android. This version is older than the bundled version however this only increases the size by around 600KB. To use this version you must alter the mobile_scanner gradle file to replace You can read more about the difference between the two versions here. iOSiOS 11 and newer. Reason: MLKit for iOS requires at least iOS 10 and a 64bit device. Add the following keys to your Info.plist file, located in /ios/Runner/Info.plist: NSCameraUsageDescription - describe why your app needs access to the camera. This is called Privacy - Camera Usage Description in the visual editor. If you want to use the local gallery feature from image_picker NSPhotoLibraryUsageDescription - describe why your app needs permission for the photo library. This is called Privacy - Photo Library Usage Description in the visual editor. macOSmacOS 10.13 or newer. Reason: Apple Vision library. WebAdd this to <script src="https://cdn.jsdelivr.net/npm/jsqr@1.4.0/dist/jsQR.min.js"></script>Web only supports QR codes for now. Do you have experience with Flutter Web development? Help me with migrating from jsQR to qr-scanner for full barcode support! Features Supported
UsageImport If you don't provide a controller, you can't control functions like the torch(flash) or switching camera. If you don't set allowDuplicates to false, you can get multiple scans in a very short time, causing things like pop() to fire lots of times. Example without controller: import 'package:mobile_scanner/mobile_scanner.dart';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('Mobile Scanner')),
body: MobileScanner(
allowDuplicates: false,
onDetect: (barcode, args) {
if (barcode.rawValue == null) {
debugPrint('Failed to scan Barcode');
} else {
final String code = barcode.rawValue!;
debugPrint('Barcode found! $code');
}
}),
);
}Example with controller and initial values: import 'package:mobile_scanner/mobile_scanner.dart';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('Mobile Scanner')),
body: MobileScanner(
allowDuplicates: false,
controller: MobileScannerController(
facing: CameraFacing.front, torchEnabled: true),
onDetect: (barcode, args) {
if (barcode.rawValue == null) {
debugPrint('Failed to scan Barcode');
} else {
final String code = barcode.rawValue!;
debugPrint('Barcode found! $code');
}
}),
);
}Example with controller and torch & camera controls: import 'package:mobile_scanner/mobile_scanner.dart';
MobileScannerController cameraController = MobileScannerController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Mobile Scanner'),
actions: [
IconButton(
color: Colors.white,
icon: ValueListenableBuilder(
valueListenable: cameraController.torchState,
builder: (context, state, child) {
switch (state as TorchState) {
case TorchState.off:
return const Icon(Icons.flash_off, color: Colors.grey);
case TorchState.on:
return const Icon(Icons.flash_on, color: Colors.yellow);
}
},
),
iconSize: 32.0,
onPressed: () => cameraController.toggleTorch(),
),
IconButton(
color: Colors.white,
icon: ValueListenableBuilder(
valueListenable: cameraController.cameraFacingState,
builder: (context, state, child) {
switch (state as CameraFacing) {
case CameraFacing.front:
return const Icon(Icons.camera_front);
case CameraFacing.back:
return const Icon(Icons.camera_rear);
}
},
),
iconSize: 32.0,
onPressed: () => cameraController.switchCamera(),
),
],
),
body: MobileScanner(
allowDuplicates: false,
controller: cameraController,
onDetect: (barcode, args) {
if (barcode.rawValue == null) {
debugPrint('Failed to scan Barcode');
} else {
final String code = barcode.rawValue!;
debugPrint('Barcode found! $code');
}
}));
}Example with controller and returning images import 'package:mobile_scanner/mobile_scanner.dart';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('Mobile Scanner')),
body: MobileScanner(
controller: MobileScannerController(
facing: CameraFacing.front,
torchEnabled: true,
returnImage: true,
),
onDetect: (barcode, args) {
if (barcode.rawValue == null) {
debugPrint('Failed to scan Barcode');
} else {
final String code = barcode.rawValue!;
debugPrint('Barcode found! $code');
debugPrint(
'Image returned! length: ${barcode.image!.lengthInBytes}b');
showDialog(
context: context,
builder: (context) => Image(image: MemoryImage(barcode.image!)),
);
Future.delayed(const Duration(seconds: 2), () {
Navigator.pop(context);
});
}
},
),
);
}
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