Flutter调用原生硬件Api实现扫码

barcode_scan2可以实现扫描条形码、二维码

地址：https://pub.dev/packages/barcode_scan2

Android里面的配置

1. 安装

   dependencies:
       barcode_scan2: ^4.1.3
   

1. 配置权限

   Add the camera permission to your AndroidManifest.xml

   配置：android\app\src\main\AndroidManifest.xml

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

1. 编辑你的android目录下面的build.gradle （Edit your project-level build.gradle file to look likethis）

   注意：如果ext.kotlin_version的版本大于1.3.61则无需配置

   buildscript {
     ext.kotlin_version = '1.3.61'
     // ...
     dependencies {
       // ...
       classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
   }
   

1. 编辑你的android/app目录下面的build.gradle （Edit your app-level build.gradle file to look likethis）

   apply plugin: 'kotlin-android'
   // ...
   dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     // ...
   }
   

   注意：minSdkVersion 18 以上

   defaultConfig {
       ...
       minSdkVersion 18
       ...
   }
   

   提示：如果您使用的是最新版本的flutter sdk，在Android里面只需要配置minSdkVersion 18和CAMERA的权限

Ios里面的配置

<dict>
  <!-- ... -->
  <key>NSCameraUsageDescription</key>
  <string>Camera permission is required for barcode scanning.</string>
  <!-- ... -->
</dict>

示例代码

import 'package:flutter/material.dart';
import 'package:barcode_scan2/barcode_scan2.dart';
class BarcodeScanPage extends StatefulWidget {
  const BarcodeScanPage({super.key});
  @override
  State<BarcodeScanPage> createState() => _BarcodeScanPageState();
}
class _BarcodeScanPageState extends State<BarcodeScanPage> {
  void _doBarcodeScan() async {
    var options = const ScanOptions(
      // set the options
      autoEnableFlash: true,
      strings: {
        'cancel': '取消',
        'flash_on': '打开Flash',
        'flash_off': '关闭Flash',
      });
    var result = await BarcodeScanner.scan(options: options);
    print(result.type); // The result type (barcode, cancelled, failed)
    print(result.rawContent); // The barcode content
    print(result.format); // The barcode format (as enum)
    print(result
          .formatNote); // If a unknown format was scanned this field contains a
    note
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("扫码演示")),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: _doBarcodeScan,
              child: const Text("扫描二维码 条形码"),
            )
          ],
        ),
      ),
    );
  }
}