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Description:

qr bar code scanner dialog

QR/Bar Code Scanner Dialog #
Plugin to show a simple scanner dialog and capture Bar/QR code easily. Works with Android, iOS, and Web. It uses html5-qrcode js library for web and qr_code_scanner for Android and iOS
Note:
At present, this is the only flutter web plugin that supports barcode scanning
Get Scanned QR/Bar Code #
When a QR code is recognized, the text identified will be passed to function callback onCode.

class _MyAppState extends State<MyApp> {

final _qrBarCodeScannerDialogPlugin = QrBarCodeScannerDialog();
String? code;

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: Builder(builder: (context) {
return Material(
child: Center(
child: ElevatedButton(
onPressed: () {
_qrBarCodeScannerDialogPlugin.getScannedQrBarCode(
context: context,
onCode: (code) {
setState(() {
this.code = code;
});
});
},
child: Text(code ?? "Click me")),
),
);
}),
),
);
}
}
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Android Integration #
In order to use this plugin, please update the Gradle, Kotlin, and Kotlin Gradle Plugin:
In android/build.gradle change ext.kotlin_version = '1.3.50' to ext.kotlin_version = '1.5.10'
In android/build.gradle change classpath 'com.android.tools.build:gradle:3.5.0' to classpath 'com.android.tools.build:gradle:4.2.0'
In android/gradle/wrapper/gradle-wrapper.properties change distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip to distributionUrl=https\://services.gradle.org/distributions/gradle-6.9-all.zip
In android/app/build.gradle change
defaultConfig{
...
minSdkVersion 16
} to
defaultConfig{
...
minSdkVersion 20
}
Warning #
If you are using Flutter Beta or Dev channel (1.25 or 1.26) you can get the following error:
java.lang.AbstractMethodError: abstract method "void io.flutter.plugin.platform.PlatformView.onFlutterViewAttached(android.view.View)"
This is a bug in Flutter which is being tracked here: https://github.com/flutter/flutter/issues/72185
There is a workaround by adding android.enableDexingArtifactTransform=false to your gradle.properties file.
iOS Integration #
In order to use this plugin, add the following to your Info.plist file:
<key>io.flutter.embedded_views_preview</key>
<true/>
<key>NSCameraUsageDescription</key>
<string>This app needs camera access to scan QR codes</string>
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Web Integration #
No need to update anything, the plugin appends the HTML contents to the DOM.