fast_qr_reader_view

插件介绍

基于插件公开信息、社区数据与项目使用情况整理的选型参考。

Fast QR Reader View 是一个 Flutter 小部件，使用原生平台代码在 iOS 和 Android 上实现高性能，可实时扫描多种条形码类型，包括二维码、PDF417 和 CODE39。它具有实时预览摄像头画面，确保准确且快速的检测。适用于需要可靠且高效条形码扫描的应用程序，无需完全依赖纯 Dart 实现。

适合场景

移动库存管理
非接触式支付处理
PDF417文档扫描
物流中的资产追踪
快速从条形码输入数据

主要特点

原生代码集成以提升速度
支持多种条形码格式
实时摄像头预览
跨平台兼容性
低延迟扫描

适合对象

需要快速条形码扫描的开发人员
需要实时数据捕获的应用程序
现场服务和零售应用
物流和仓储系统

使用建议

需要设备上的相机权限
仅限iOS和Android平台
可能需要额外配置才能访问摄像头
性能取决于设备硬件

原始 README

以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。

Fast QR Reader View Plugin

See in pub

A Flutter plugin for iOS and Android allowing access to the device cameras to scan multiple type of codes (QR, PDF417, CODE39, etc). Heavily based on camera

Red box is a Flutter animation (removable). Low FPS due to GIF

Features:

Display live camera preview in a widget.
Uses native AVFoundation code detection in iOS
Uses ML Kit in Android

Installation

First, add fast_qr_reader_view as a dependency in your pubspec.yaml file.

iOS

Add a row to the ios/Runner/Info.plist with the key Privacy - Camera Usage Description and a usage description.

Or in text format add the key:

<key>NSCameraUsageDescription</key>
<string>Can I use the camera please?</string>

Android

Change the minimum Android sdk version to 21 (or higher) in your android/app/build.gradle file.

minSdkVersion 21

Example

Here is a small example flutter app displaying a full screen camera preview.

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

List<CameraDescription> cameras;

Future<Null> main() async {
  cameras = await availableCameras();
  runApp(new CameraApp());
}

class CameraApp extends StatefulWidget {
  @override
  _CameraAppState createState() => new _CameraAppState();
}

class _CameraAppState extends State<CameraApp> {
  QRReaderController controller;

  @override
  void initState() {
    super.initState();
    controller = new QRReaderController(cameras[0], ResolutionPreset.medium, [CodeFormat.qr], (dynamic value){
        print(value); // the result!
    // ... do something
    // wait 3 seconds then start scanning again.
    new Future.delayed(const Duration(seconds: 3), controller.startScanning);
    });
    controller.initialize().then((_) {
      if (!mounted) {
        return;
      }
      setState(() {});
      controller.startScanning();
    });
  }

  @override
  void dispose() {
    controller?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    if (!controller.value.isInitialized) {
      return new Container();
    }
    return new AspectRatio(
        aspectRatio:
        controller.value.aspectRatio,
        child: new QRReaderPreview(controller));
  }
}

For a more elaborate usage example see here.

Note: This plugin is still under development, and some APIs might not be available yet. Feedback welcome and Pull Requests are most welcome!

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