Flutter二维码扫描插件xindalu_scan_flutter的使用

xindalu_scan_flutter

新大陆手持设备红外扫描识别插件by_flutter

安装

在 pubspec.yaml 文件中添加依赖：

dependencies:
  xindalu_scan_flutter: ^1.0.0

然后运行以下命令以获取依赖：

flutter pub get

初始化

在使用插件之前，需要进行初始化并监听扫描事件。

import 'dart:convert';
import 'package:flutter/services.dart';
import 'package:xindalu_scan_flutter/constant.dart';
import 'package:xindalu_scan_flutter/xindalu_result_model.dart';
import 'package:xindalu_scan_flutter/xindalu_scan_flutter.dart';

class MyHomePage extends StatefulWidget {
  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  // 创建一个 EventChannel 实例用于接收扫描数据
  static const EventChannel _eventChannel = EventChannel(Constant.CHANNEL_NAME);
  StreamSubscription<XindaluDataResultModel>? _streamSubscription;

  [@override](/user/override)
  void initState() {
    super.initState();
    
    // 初始化扫描插件
    init();

    // 监听扫描数据
    _streamSubscription = _eventChannel.receiveBroadcastStream().listen((value) {
      try {
        // 解析扫描结果
        XindaluDataResultModel result = XindaluDataResultModel.fromJson(json.decode(value));
        print("条码值: ${result.code1}"); // 输出扫描到的条码值
        print("状态: ${result.scanState}"); // 扫描状态，ok表示成功，fail表示失败
        print("条码类型: ${result.scanBarcodeType}"); // 条码类型，-1表示未知类型
      } catch (e, s) {
        // 捕获异常
        print(e);
        print(s);
      }
    });
  }

  // 初始化扫描插件
  Future<void> init() async {
    await XindaluScanFlutter.init();
  }

  [@override](/user/override)
  void dispose() {
    // 取消订阅以释放资源
    _streamSubscription?.cancel();
    super.dispose();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('新大陆扫码示例'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            // 触发扫码操作（具体触发方式根据硬件设备）
          },
          child: Text('开始扫码'),
        ),
      ),
    );
  }
}

使用例子

以下是一个完整的示例代码，展示如何使用 xindalu_scan_flutter 插件进行二维码扫描。

import 'dart:convert';
import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:xindalu_scan_flutter/constant.dart';
import 'package:xindalu_scan_flutter/xindalu_result_model.dart';
import 'package:xindalu_scan_flutter/xindalu_scan_flutter.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  static const EventChannel _eventChannel = EventChannel(Constant.CHANNEL_NAME);
  StreamSubscription<XindaluDataResultModel>? _streamSubscription;

  [@override](/user/override)
  void initState() {
    super.initState();

    // 初始化扫描插件
    init();

    // 监听扫描数据
    _streamSubscription = _eventChannel.receiveBroadcastStream().listen((value) {
      try {
        // 解析扫描结果
        XindaluDataResultModel result = XindaluDataResultModel.fromJson(json.decode(value));
        print("条码值: ${result.code1}");
        print("状态: ${result.scanState}");
        print("条码类型: ${result.scanBarcodeType}");
      } catch (e, s) {
        // 捕获异常
        print(e);
        print(s);
      }
    });
  }

  // 初始化扫描插件
  Future<void> init() async {
    await XindaluScanFlutter.init();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('新大陆扫码示例'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            // 触发扫码操作（具体触发方式根据硬件设备）
          },
          child: Text('开始扫码'),
        ),
      ),
    );
  }

  [@override](/user/override)
  void dispose() {
    // 取消订阅以释放资源
    _streamSubscription?.cancel();
    super.dispose();
  }
}