Flutter条形码扫描插件scandit_flutter_datacapture_barcode的使用

ScanditBarcodeCapture实现了Scandit Data Capture SDK的条形码捕获功能。它支持读取许多不同的条形码符号学。你可以通过官方文档了解更多，或从我们的示例开始。

添加依赖

首先，在pubspec.yaml文件中添加scandit_flutter_datacapture_barcode依赖：

dependencies:
  flutter:
    sdk: flutter
  scandit_flutter_datacapture_barcode: ^latest_version # 替换为最新版本号

然后执行flutter pub get以安装新的依赖项。

初始化和配置

接下来，在您的Flutter应用程序中初始化并配置Scandit Barcode Capture。下面是一个完整的示例代码，展示了如何创建一个简单的条形码扫描应用程序：

示例代码

main.dart

import 'package:flutter/material.dart';
import 'package:scandit_flutter_datacapture_barcode/scandit_flutter_datacapture_barcode.dart';
import 'package:scandit_flutter_datacapture_core/scandit_flutter_datacapture_core.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Scandit Barcode Scanner',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: BarcodeScannerScreen(),
    );
  }
}

class BarcodeScannerScreen extends StatefulWidget {
  @override
  _BarcodeScannerScreenState createState() => _BarcodeScannerScreenState();
}

class _BarcodeScannerScreenState extends State<BarcodeScannerScreen> {
  late DataCaptureContext dataCaptureContext;
  late BarcodeCapture barcodeCapture;
  late CameraSettings cameraSettings;
  late Camera camera;
  late DataCaptureView dataCaptureView;

  @override
  void initState() {
    super.initState();

    // Initialize Scandit Data Capture Context with your license key.
    dataCaptureContext = DataCaptureContext.forLicenseKey('YOUR_SCANDIT_LICENSE_KEY');

    // Create a new barcode capture mode and set its settings.
    var settings = BarcodeCaptureSettings()
      ..setSymbologyEnabled(Symbology.ean13, true)
      ..setSymbologyEnabled(Symbology.code128, true);
    barcodeCapture = BarcodeCapture.forDataCaptureContext(dataCaptureContext, settings);

    // Set up the camera.
    cameraSettings = CameraSettings.defaultSettings();
    camera = Camera.defaultCamera.withSettings(cameraSettings);

    // Start the camera.
    camera.switchToDesiredState(CameraState.on);

    // Create a view to show the camera preview.
    dataCaptureView = DataCaptureView.forContext(dataCaptureContext, null)
      ..addDefaultOverlayForCaptureMode(barcodeCapture);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Scandit Barcode Scanner'),
      ),
      body: Column(
        children: <Widget>[
          Expanded(
            child: Container(
              child: dataCaptureView.toWidget(context),
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Text('Scan a barcode!'),
          ),
        ],
      ),
    );
  }

  @override
  void dispose() {
    camera.switchToDesiredState(CameraState.off);
    super.dispose();
  }
}

注意事项

1. 许可证密钥：请确保替换YOUR_SCANDIT_LICENSE_KEY为您自己的Scandit许可证密钥。

2. 权限：在AndroidManifest.xml和Info.plist中添加相机权限。

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

     <key>NSCameraUsageDescription</key>
     <string>We need access to your camera to scan barcodes.</string>
     

3. iOS平台设置：对于iOS，您还需要在ios/Runner/AppDelegate.swift中添加以下内容：

   import ScanditCaptureCore
   import ScanditBarcodeCapture
   

4. 调试与优化：根据需要调整BarcodeCaptureSettings和CameraSettings以适应您的应用场景。

这个示例展示了如何集成Scandit条形码扫描插件到Flutter应用中，并提供了一个基本的用户界面来启动相机并扫描条形码。您可以根据具体需求进一步扩展和完善此示例。