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This article translated from pub: barcode_scan2 | Flutter Package (Flutter – IO. Cn)

Translated version: barcode_scan2 4.2.0

rebirth

The original barcode_scan is no longer maintained, so barcode_scan2 is born and supports empty security.

barcode_scan2 

Flutter plugin for scanning 2D bar codes and QR codes.

The plugin provides wrappers for two commonly used iOS and Android libraries:

• IOS: github.com/mikebuss/MT…
• Android: github.com/dm77/barcod…

Features:

• Scanning 2D barcode
• Scan the QR code
• Control flash during scanning
• Permission to handle

start

Android

For Android, you need to do the following before using this plug-in:

• Add camera permissions in androidmanifest.xml.

  <uses-permission android:name="android.permission.CAMERA" />

• The plug-in is written using Kotlin. Therefore, you need to add Kotlin support to your project. View – Install the Kotlin plugin.

Edit the build.gradle file at the project level as follows:

buildscript {
    ext.kotlin_version = '1.3.61'
    // ...
    dependencies {
        // ...
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"}}// ...
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Edit the build.gradle file at the application level as follows:

apply plugin: 'kotlin-android'
// ...
dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    // ...
}
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You can now rely on barcode_scan2 in pubspec.yaml files:

dependencies:
    # ...
    barcode_scan2: any
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Barcode_scan: any

Click “Package Get” in Android Studio or run flutter Package Get in the project directory.

iOS

To use it on iOS, add the camera’s usage description to info.plist.

<dict>
    <! -... -->
    <key>NSCameraUsageDescription</key>
    <string>Camera permission is required for barcode scanning.</string>
    <! -... -->
</dict>
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use

import 'package:barcode_scan/barcode_scan.dart';

void main() async {
  var result = await BarcodeScanner.scan();

  print(result.type); // The result type (barcode, cancelled, failed)
  print(result.rawContent); // The barcode content
  print(result.format); // The barcode format (as enum)
  print(result.formatNote); // If a unknown format was scanned this field contains a note
}
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Advanced usage

You can pass options to the scan method:

import 'package:barcode_scan/barcode_scan.dart';

void main() async {

  var options = ScanOptions(
    // set the options
  );

  var result = await BarcodeScanner.scan(options: options);

  // ...
}
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Supported options

The development of installation

Install the protobuf

Mac:

$ brew install protobuf
$ brew install swift-protobuf
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Windows/Linux: github.com/protocolbuf…

Activate the Protobuf Dart plugin:

$ flutter pub global activate protoc_plugin
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Install Protobuf Support for IDEA/Android Studio or VS Code-Proto3 for VS Code.

If protos.proto is changed, you need to execute./generate_proto.sh to update the DART/SWIFT code.

Q&A

Android “Could not find org.jetbrains.kotlin:kotlin-stdlib-jre…”

The org. Jetbrains. Kotlin: kotlin – stdlib – jre to org. Jetbrains. Kotlin: kotlin stdlib – JDK (StackOverflow)