1. Android工程包含ZXing.Net.Mobile.Forms

 

2. 在C# 工程中, 包含ZXing.Net.Mobile

 

3. 在Android工程的MainActivity.cs中, 添加下面代码:

global::ZXing.Net.Mobile.Forms.Android.Platform.Init();

ZXing.Mobile.MobileBarcodeScanner.Initialize(this.Application);

using System;using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;namespace TestScan.Droid
{[Activity(Label = "TestScan", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity{protected override void OnCreate(Bundle bundle){TabLayoutResource = Resource.Layout.Tabbar;ToolbarResource = Resource.Layout.Toolbar;base.OnCreate(bundle);global::Xamarin.Forms.Forms.Init(this, bundle);global::ZXing.Net.Mobile.Forms.Android.Platform.Init();ZXing.Mobile.MobileBarcodeScanner.Initialize(this.Application);LoadApplication(new App());}}
}

 

4. 在C#页面工程中就可以这样调用扫码功能了:

private async void Button_Clicked(object sender, EventArgs e)
{    var scanner = new ZXing.Mobile.MobileBarcodeScanner();var result = await scanner.Scan();if (result != null)Console.WriteLine("Scanned Barcode: " + result.Text);
}

 

demo下载地址