Original barcode_scan was discontinued, so barcode_scan2 was borned with sound null safety support🎉
A flutter plugin for scanning 2D barcodes and QR codes.
This provides a simple wrapper for two commonly used iOS and Android libraries:
- Scan 2D barcodes
- Scan QR codes
- Control the flash while scanning
- Permission handling
For Android, you must do the following before you can use the plugin:
-
Add the camera permission to your AndroidManifest.xml
<uses-permission android:name="android.permission.CAMERA" /> -
This plugin is written in Kotlin. Therefore, you need to add Kotlin support to your project. See installing the Kotlin plugin.
Edit your project-level build.gradle file to look like this:
buildscript {
ext.kotlin_version = '1.3.61'
// ...
dependencies {
// ...
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
// ...Edit your app-level build.gradle file to look like this:
apply plugin: 'kotlin-android'
// ...
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
// ...
}Now you can depend on the barcode_scan plugin in your pubspec.yaml file:
dependencies:
# ...
barcode_scan2: anyClick "Packages get" in Android Studio or run flutter packages get in your project folder.
To use on iOS, you must add the the camera usage description to your Info.plist
<dict>
<!-- ... -->
<key>NSCameraUsageDescription</key>
<string>Camera permission is required for barcode scanning.</string>
<!-- ... -->
</dict>import 'package:barcode_scan2/barcode_scan2.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
}You can pass options to the scan method:
import 'package:barcode_scan2/barcode_scan2.dart';
void main() async {
var options = ScanOptions(
// set the options
);
var result = await BarcodeScanner.scan(options: options);
// ...
}| Option | Type | Description | Supported by |
|---|---|---|---|
strings.cancel |
String |
The cancel button text on iOS | iOS only |
strings.flash_on |
String |
The flash on button text | iOS + Android |
strings.flash_off |
String |
The flash off button text | iOS + Android |
restrictFormat |
BarcodeFormat[] |
Restrict the formats which are recognized | iOS + Android |
useCamera |
int |
The index of the camera which is used for scanning (See BarcodeScanner.numberOfCameras) |
iOS + Android |
autoEnableFlash |
bool |
Enable the flash when start scanning | iOS + Android |
android.aspectTolerance |
double |
Enable auto focus on Android | Android only |
android.useAutoFocus |
bool |
Set aspect ratio tolerance level used in calculating the optimal Camera preview size | Android only |
Mac:
$ brew install protobuf
$ brew install swift-protobufWindows / Linux: https://github.com/protocolbuffers/protobuf#protocol-compiler-installation
Activate the protobuf dart plugin:
$ flutter pub global activate protoc_pluginInstall theProtobuf Support plugin for IDEA / Android Studio or vscode-proto3 for VS Code
If you changed the protos.proto you've to execute the ./generate_proto.sh to update the dart / swift sources
Change org.jetbrains.kotlin:kotlin-stdlib-jre to org.jetbrains.kotlin:kotlin-stdlib-jdk
(StackOverflow)
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