barcode_scanner_kit

Description:

barcode scanner kit

Google's ML Barcode Scanner Flutter Plugin #
A Flutter plugin to use Google's standalone ML Kit for Android and iOS.
Features #
Vision #



Feature
Android
iOS




Barcode Scanning
✅
✅



Requirements #
iOS #

Minimum iOS Deployment Target: 10.0
Xcode 12 or newer
Swift 5
ML Kit only supports 64-bit architectures (x86_64 and arm64). Check this list to see if your device has the required device capabilities.

Since ML Kit does not support 32-bit architectures (i386 and armv7) (Read mode), you need to exclude amrv7 architectures in Xcode in order to run flutter build ios or flutter build ipa.
Go to Project > Runner > Building Settings > Excluded Architectures > Any SDK > armv7

Then your Podfile should look like this:
# add this line:
$iOSVersion = '10.0'

post_install do |installer|
# add these lines:
installer.pods_project.build_configurations.each do |config|
config.build_settings["EXCLUDED_ARCHS[sdk=*]"] = "armv7"
config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = $iOSVersion
end

installer.pods_project.targets.each do |target|
flutter_additional_ios_build_settings(target)

# add these lines:
target.build_configurations.each do |config|
if Gem::Version.new($iOSVersion) > Gem::Version.new(config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'])
config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = $iOSVersion
end
end

end
end
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Notice that the minimum IPHONEOS_DEPLOYMENT_TARGET is 10.0, you can set it to something newer but not older.
Android #

minSdkVersion: 21
targetSdkVersion: 29

Usage #
Add this plugin as dependency in your pubspec.yaml.


In your project-level build.gradle file, make sure to include Google's Maven repository in both your buildscript and allprojects sections(for all api's).
<meta-data
android:name="com.google.mlkit.vision.DEPENDENCIES"
android:value="ica" />
<!-- To use multiple models: android:value="ica,model2,model3" -->
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Use these options:

ocr - Barcode Scanning



1. Create an InputImage
From path:
final inputImage = InputImage.fromFilePath(filePath);
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From file:
final inputImage = InputImage.fromFile(file);
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From bytes:
final inputImage = InputImage.fromBytes(bytes: bytes, inputImageData: inputImageData);
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From CameraImage (if you are using the camera plugin):
final camera; // your camera instance
final WriteBuffer allBytes = WriteBuffer();
for (Plane plane in cameraImage.planes) {
allBytes.putUint8List(plane.bytes);
}
final bytes = allBytes.done().buffer.asUint8List();

final Size imageSize = Size(cameraImage.width.toDouble(), cameraImage.height.toDouble());

final InputImageRotation imageRotation =
InputImageRotationMethods.fromRawValue(camera.sensorOrientation) ??
InputImageRotation.Rotation_0deg;

final InputImageFormat inputImageFormat =
InputImageFormatMethods.fromRawValue(cameraImage.format.raw) ??
InputImageFormat.NV21;

final planeData = cameraImage.planes.map(
(Plane plane) {
return InputImagePlaneMetadata(
bytesPerRow: plane.bytesPerRow,
height: plane.height,
width: plane.width,
);
},
).toList();

final inputImageData = InputImageData(
size: imageSize,
imageRotation: imageRotation,
inputImageFormat: inputImageFormat,
planeData: planeData,
);

final inputImage = InputImage.fromBytes(bytes: bytes, inputImageData: inputImageData);
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2. Create an instance of detector
// vision
final barcodeScanner = GoogleMlKit.vision.barcodeScanner();
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3. Call the corresponding method
// vision
final List<Barcode> barcodes = await barcodeScanner.processImage(inputImage);
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4. Extract data from response.
a. Extract barcodes.
for (Barcode barcode in barcodes) {
final BarcodeType type = barcode.type;
final Rect boundingBox = barcode.value.boundingBox;
final String displayValue = barcode.value.displayValue;
final String rawValue = barcode.value.rawValue;

// See API reference for complete list of supported types
switch (type) {
case BarcodeType.wifi:
BarcodeWifi barcodeWifi = barcode.value;
break;
case BarcodeValueType.url:
BarcodeUrl barcodeUrl = barcode.value;
break;
}
}
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5. Release resources with close().
// vision
barcodeScanner.close();
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Android #
To reduce the apk size read more about it in issue #26. Also look at this.
iOS #
If you are using this plugin in your app and any other plugin that requires Firebase, there is a known issues you will encounter a dependency error when running pod install. To read more about it go to issue #27.
License #
MIT