Flutter二维码扫描插件klippa_scanner_sdk的使用
Flutter二维码扫描插件klippa_scanner_sdk的使用
SDK usage
请注意,您需要一个许可证才能使用此SDK。如果您想使用我们的扫描器,请联系 Klippa。
Getting started
Android
编辑android/key.properties
文件,如果不存在则创建它,并添加SDK凭证:
klippa.scanner.sdk.username={your-username}
klippa.scanner.sdk.password={your-password}
将 {your-username}
和 {your-password}
替换为 Klippa 提供的值。
iOS
编辑 ios/Podfile
文件,添加 Klippa CocoaPod:
platform :ios, '13.0'
ENV['KLIPPA_SCANNER_SDK_USERNAME'] = '{your-username}'
ENV['KLIPPA_SCANNER_SDK_PASSWORD'] = '{your-password}'
target 'Runner' do
// ... other instructions
if "#{ENV['KLIPPA_SCANNER_SDK_URL']}" == ""
ENV['KLIPPA_SCANNER_SDK_URL'] = File.read(File.join(File.dirname(File.realpath(__FILE__)), '.symlinks', 'plugins', 'klippa_scanner_sdk', 'ios', 'sdk_repo')).strip
end
if "#{ENV['KLIPPA_SCANNER_SDK_VERSION']}" == ""
ENV['KLIPPA_SCANNER_SDK_VERSION'] = File.read(File.join(File.dirname(File.realpath(__FILE__)), '.symlinks', 'plugins', 'klippa_scanner_sdk', 'ios', 'sdk_version')).strip
end
pod 'Klippa-Scanner', podspec: "#{ENV['KLIPPA_SCANNER_SDK_URL']}/#{ENV['KLIPPA_SCANNER_SDK_USERNAME']}/#{ENV['KLIPPA_SCANNER_SDK_PASSWORD']}/KlippaScanner/#{ENV['KLIPPA_SCANNER_SDK_VERSION']}.podspec"
end
将 {your-username}
和 {your-password}
替换为 Klippa 提供的值。
编辑 ios/{project-name}/Info.plist
文件并添加 NSCameraUsageDescription
值:
<key>NSCameraUsageDescription</key>
<string>Access to your camera is needed to photograph documents.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>Access to your photo library is used to save the images of documents.</string>
Flutter
在 pubspec.yaml
文件中添加 klippa_scanner_sdk
作为依赖项:
dependencies:
flutter:
sdk: flutter
klippa_scanner_sdk: ^x.y.z
# Rest of dependencies
Usage
import 'package:klippa_scanner_sdk/klippa_scanner_sdk.dart';
var config = CameraConfig();
try {
var result = await KlippaScannerSdk.startSession(config, '{insert-license-here}');
} on PlatformException catch (e) {
print('Failed to start session ' + e.toString());
}
示例代码
以下是一个完整的示例应用:
import 'package:flutter/material.dart';
import 'package:klippa_scanner_sdk/klippa_scanner_sdk.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
[@override](/user/override)
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String _scannerResult = 'Unknown';
String license = "{your-license}";
[@override](/user/override)
void initState() {
super.initState();
}
void _startSession() async {
String sessionResultText = 'Unknown';
var config = CameraConfig();
// setup your scanner
config.storeImagesToCameraRol = true;
try {
var result = await KlippaScannerSdk.startSession(config, license);
sessionResultText = 'Finished';
print(result);
} on PlatformException catch (e) {
sessionResultText = 'Failed to start session ' + e.toString();
}
setState(() {
_scannerResult = sessionResultText;
});
if (!mounted) return;
}
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: Center(
child: Text('Scanner result: $_scannerResult\n'),
),
floatingActionButton: FloatingActionButton(
onPressed: _startSession,
tooltip: 'Start session',
child: Icon(Icons.add),
),
),
);
}
}
更多关于Flutter二维码扫描插件klippa_scanner_sdk的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter二维码扫描插件klippa_scanner_sdk的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是如何在Flutter项目中使用klippa_scanner_sdk
插件进行二维码扫描的代码示例。klippa_scanner_sdk
是一个强大的二维码扫描库,适用于Flutter应用。
首先,确保你已经在pubspec.yaml
文件中添加了klippa_scanner_sdk
依赖:
dependencies:
flutter:
sdk: flutter
klippa_scanner_sdk: ^最新版本号 # 请替换为最新版本号
然后,运行flutter pub get
来安装依赖。
接下来,你可以在你的Flutter项目中按照以下步骤使用klippa_scanner_sdk
进行二维码扫描:
1. 导入必要的包
在你的Dart文件中,导入klippa_scanner_sdk
包:
import 'package:klippa_scanner_sdk/klippa_scanner_sdk.dart';
import 'package:flutter/material.dart';
2. 配置扫描器
你可以使用KlippaScannerController
来配置和管理扫描器。以下是一个简单的示例,展示了如何启动扫描器并处理扫描结果:
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Klippa Scanner Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: ScannerScreen(),
);
}
}
class ScannerScreen extends StatefulWidget {
@override
_ScannerScreenState createState() => _ScannerScreenState();
}
class _ScannerScreenState extends State<ScannerScreen> {
late KlippaScannerController _scannerController;
@override
void initState() {
super.initState();
_scannerController = KlippaScannerController(
onScanResult: (result) {
// 处理扫描结果
Navigator.of(context).pop(result);
showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: Text('扫描结果'),
content: Text(result),
actions: <Widget>[
TextButton(
child: Text('关闭'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
},
);
}
@override
void dispose() {
_scannerController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('二维码扫描'),
),
body: Center(
child: ElevatedButton(
onPressed: () async {
// 启动扫描器
await _scannerController.startScanner();
},
child: Text('开始扫描'),
),
),
);
}
}
3. 处理权限
在Android和iOS上,二维码扫描通常需要相机权限。确保在AndroidManifest.xml
和Info.plist
中添加了必要的权限声明。
Android (AndroidManifest.xml
)
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
iOS (Info.plist
)
<key>NSCameraUsageDescription</key>
<string>需要访问相机以扫描二维码</string>
4. 请求权限
在实际应用中,你还需要在运行时请求相机权限。可以使用permission_handler
插件来处理权限请求。以下是如何集成permission_handler
并请求相机权限的示例:
在pubspec.yaml
中添加permission_handler
依赖:
dependencies:
permission_handler: ^最新版本号 # 请替换为最新版本号
然后在你的代码中请求权限:
import 'package:permission_handler/permission_handler.dart';
// 在ScannerScreen类的initState方法中添加以下代码
@override
void initState() {
super.initState();
// 请求相机权限
_requestCameraPermission().then((status) {
if (status == PermissionStatus.granted) {
// 权限已授予,初始化扫描器
_scannerController = KlippaScannerController(
onScanResult: (result) {
// 处理扫描结果
Navigator.of(context).pop(result);
showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: Text('扫描结果'),
content: Text(result),
actions: <Widget>[
TextButton(
child: Text('关闭'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
},
);
} else {
// 权限被拒绝,显示提示信息
showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: Text('权限被拒绝'),
content: Text('需要相机权限才能扫描二维码'),
actions: <Widget>[
TextButton(
child: Text('打开设置'),
onPressed: () {
openAppSettings();
},
),
],
);
},
);
}
});
}
Future<PermissionStatus> _requestCameraPermission() async {
var status = await Permission.camera.status;
if (!status.isGranted) {
var result = await Permission.camera.request();
if (result.isPermanentlyDenied) {
// 用户已永久拒绝权限,打开应用设置
openAppSettings();
}
return result;
} else {
return status;
}
}
确保在ios/Runner/Info.plist
和android/app/src/main/AndroidManifest.xml
中正确配置了相机权限。
以上代码展示了如何在Flutter应用中使用klippa_scanner_sdk
进行二维码扫描,包括初始化扫描器、请求相机权限以及处理扫描结果。希望这对你有帮助!