Flutter二维码生成与扫描插件flutter_mi_code的使用

Flutter二维码生成与扫描插件flutter_mi_code的使用

flutter_mi_code 是一个用于生成和扫描二维码的UI工具包。

功能

flutter_mi_code 插件可以实现以下功能：

1. 生成二维码
2. 扫描二维码

开始使用

首先，确保你的项目中已经添加了 flutter_mi_code 依赖。在 pubspec.yaml 文件中添加以下内容：

dependencies:
  flutter:
    sdk: flutter
  flutter_mi_code: ^0.0.1

然后运行 flutter pub get 命令来获取依赖。

使用示例

以下是一个完整的示例，展示了如何使用 flutter_mi_code 插件进行二维码生成和扫描。

主页面

import 'package:flutter/material.dart';
import 'package:flutter_mi_code/flutter_mi_code.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Mi Code Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

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

class _MyHomePageState extends State<MyHomePage> {
  String qrCodeData = '';

  void generateQRCode(String data) async {
    var result = await FlutterMiCode.generate(data);
    if (result != null) {
      setState(() {
        qrCodeData = result;
      });
    }
  }

  void scanQRCode() async {
    var result = await FlutterMiCode.scan();
    if (result != null) {
      setState(() {
        qrCodeData = result;
      });
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Mi Code Demo'),
      ),
      body: Padding(
        padding: EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: () => generateQRCode('Hello, World!'),
              child: Text('Generate QR Code'),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () => scanQRCode(),
              child: Text('Scan QR Code'),
            ),
            SizedBox(height: 20),
            Text(qrCodeData),
          ],
        ),
      ),
    );
  }
}

说明

1. 导入库：

   import 'package:flutter/material.dart';
   import 'package:flutter_mi_code/flutter_mi_code.dart';
   

2. 生成二维码：

   void generateQRCode(String data) async {
     var result = await FlutterMiCode.generate(data);
     if (result != null) {
       setState(() {
         qrCodeData = result;
       });
     }
   }
   

3. 扫描二维码：

   void scanQRCode() async {
     var result = await FlutterMiCode.scan();
     if (result != null) {
       setState(() {
         qrCodeData = result;
       });
     }
   }
   

4. UI布局：

   [@override](/user/override)
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         title: Text('Flutter Mi Code Demo'),
       ),
       body: Padding(
         padding: EdgeInsets.all(16.0),
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
             ElevatedButton(
               onPressed: () => generateQRCode('Hello, World!'),
               child: Text('Generate QR Code'),
             ),
             SizedBox(height: 20),
             ElevatedButton(
               onPressed: () => scanQRCode(),
               child: Text('Scan QR Code'),
             ),
             SizedBox(height: 20),
             Text(qrCodeData),
           ],
         ),
       ),
     );
   }