android - 使用虚拟场景在 Android 模拟器中扫描条码

Question

我正在使用 flutter_barcode_reader 开发一个 Flutter 项目插入。在物理 Android 设备上一切正常，但是当我尝试扫描相机中的二维码时，二维码扫描仪无法在模拟器上使用react virtual scene .

有没有办法在不使用网络摄像头或物理设备的情况下实现这一目标？

Answer 1

似乎 flutter_barcode_reader插件，不再可用。

Since there are many other libraries which provides more and betterfunctionality in barcode scanning, I decided to discontinue thedevelopment of this project.

只是为了专注于您关于使用模拟器扫描二维码的问题，我已经设法从虚拟场景中扫描二维码。
这是 sample app我用来模拟这个:

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:barcode_scan/barcode_scan.dart';
import 'package:flutter/services.dart';

void main() => runApp(MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    ));

class HomePage extends StatefulWidget {
  @override
  HomePageState createState() {
    return new HomePageState();
  }
}

class HomePageState extends State<HomePage> {
  String result = "Hey there !";

  Future _scanQR() async {
    try {
      String qrResult = await BarcodeScanner.scan();
      setState(() {
        result = qrResult;
      });
    } on PlatformException catch (ex) {
      if (ex.code == BarcodeScanner.CameraAccessDenied) {
        setState(() {
          result = "Camera permission was denied";
        });
      } else {
        setState(() {
          result = "Unknown Error $ex";
        });
      }
    } on FormatException {
      setState(() {
        result = "You pressed the back button before scanning anything";
      });
    } catch (ex) {
      setState(() {
        result = "Unknown Error $ex";
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("QR Scanner"),
      ),
      body: Center(
        child: Text(
          result,
          style: new TextStyle(fontSize: 30.0, fontWeight: FontWeight.bold),
        ),
      ),
      floatingActionButton: FloatingActionButton.extended(
        icon: Icon(Icons.camera_alt),
        label: Text("Scan"),
        onPressed: _scanQR,
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
    );
  }
}

由于您没有提供示例，因此我无法判断问题出在插件还是实现上。也许您可以尝试 pub.dev 中提供的其他插件: