{"id":18001485,"url":"https://github.com/egbakou/barcodereader","last_synced_at":"2025-06-29T21:35:27.323Z","repository":{"id":150080113,"uuid":"171734435","full_name":"egbakou/BarCodeReader","owner":"egbakou","description":"Barcodes reader Project in 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Barcodes Reader in Xamarin.Forms\n\n### Lioncoding article Link\n\n[Barcodes Reader in Xamarin.Forms](https://lioncoding.com/2019/02/21/2019-02-21-concevoir-un-lecteur-de-code-barres-avec-xamarin-forms/)\n\n### Nuget packages used\n\n|                           Packages                           | Version |       Use for        |\n| :----------------------------------------------------------: | :-----: | :------------------: |\n|      [Autofac](https://www.nuget.org/packages/Autofac/)      |  4.9.1  | Inversion of control |\n| [ZXing.Net.Mobile](https://www.nuget.org/packages/ZXing.Net.Mobile/) |  2.4.1  |  Scanning Barcodes   |\n| [ZXing.Net.Mobile.Forms](https://www.nuget.org/packages/ZXing.Net.Mobile.Forms/) |  2.4.1  |  Scanning Barcodes   |\n| [Xamarin.Essentials](https://www.nuget.org/packages/Xamarin.Essentials) |  1.0.1  | Sharing scan result  |\n\n### Initializations and Configurations\n\n##### Android project\n\n- MainActivity.cs\n\n```c#\nprotected override void OnCreate(Bundle savedInstanceState)\n{\n    // ...\n\tZXing.Net.Mobile.Forms.Android.Platform.Init();\n\tXamarin.Essentials.Platform.Init(this, savedInstanceState);\n    // ...\n}\n\npublic override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)\n{\n    global::ZXing.Net.Mobile.Android.PermissionsHandler.OnRequestPermissionsResult(requestCode, permissions, grantResults);\n    Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);\n    base.OnRequestPermissionsResult(requestCode, permissions, grantResults);\n}\n```\n\n- AssemblyInfo.cs (Add permissions for scanning)\n\n```c#\n[assembly: UsesPermission(Android.Manifest.Permission.Flashlight)]\n[assembly: UsesPermission(Android.Manifest.Permission.Camera)]\n```\n\n##### IOS project\n\n- AppDelegate.cs\n\n```c#\npublic override bool FinishedLaunching(UIApplication app, NSDictionary options)\n{\n\t// ...\n\tZXing.Net.Mobile.Forms.iOS.Platform.Init();\n\t// ...\n}\n```\n\n### View source code\n\n```xml\n\u003c?xml version=\"1.0\" encoding=\"utf-8\" ?\u003e\n\u003cContentPage\n    x:Class=\"BarCodeReader.Views.MainMenuView\"\n    xmlns=\"http://xamarin.com/schemas/2014/forms\"\n    xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\"\n    Title=\"{Binding Title}\"\n    BackgroundImage=\"bg.jpg\"\u003e\n\n\n    \u003cContentPage.ToolbarItems\u003e\n        \u003cToolbarItem\n            Command=\"{Binding ClearResultCommand}\"\n            Icon=\"clear.png\"\n            Text=\"Clear\" /\u003e\n        \u003cToolbarItem\n            Command=\"{Binding ShareResultCommand}\"\n            Icon=\"share.png\"\n            Text=\"Share\" /\u003e\n    \u003c/ContentPage.ToolbarItems\u003e\n\n\n    \u003cContentPage.Content\u003e\n        \u003cStackLayout HorizontalOptions=\"CenterAndExpand\" VerticalOptions=\"CenterAndExpand\"\u003e\n            \u003cImageButton\n                Aspect=\"AspectFit\"\n                BackgroundColor=\"Transparent\"\n                Command=\"{Binding ScanCommand}\"\n                FlexLayout.AlignSelf=\"Center\"\n                FlexLayout.Grow=\"1\"\n                HorizontalOptions=\"CenterAndExpand\"\n                Source=\"barcodescanner.png\"\n                VerticalOptions=\"CenterAndExpand\"\u003e\n                \u003cVisualStateManager.VisualStateGroups\u003e\n                    \u003cVisualStateGroup x:Name=\"CommonStates\"\u003e\n                        \u003cVisualState x:Name=\"Normal\"\u003e\n                            \u003cVisualState.Setters\u003e\n                                \u003cSetter Property=\"Scale\" Value=\"1\" /\u003e\n                            \u003c/VisualState.Setters\u003e\n                        \u003c/VisualState\u003e\n\n                        \u003cVisualState x:Name=\"Pressed\"\u003e\n                            \u003cVisualState.Setters\u003e\n                                \u003cSetter Property=\"Scale\" Value=\"0.8\" /\u003e\n                            \u003c/VisualState.Setters\u003e\n                        \u003c/VisualState\u003e\n\n                    \u003c/VisualStateGroup\u003e\n                \u003c/VisualStateManager.VisualStateGroups\u003e\n            \u003c/ImageButton\u003e\n            \u003cLabel\n                Margin=\"10,20,10,0\"\n                FontAttributes=\"Bold\"\n                FontSize=\"18\"\n                HorizontalOptions=\"CenterAndExpand\"\n                HorizontalTextAlignment=\"Center\"\n                Text=\"{Binding ScanResult}\"\n                TextColor=\"#525ABB\"\n                VerticalOptions=\"CenterAndExpand\" /\u003e\n        \u003c/StackLayout\u003e\n    \u003c/ContentPage.Content\u003e\n\n\u003c/ContentPage\u003e\n```\n\n### Code behind\n\n```c#\nusing BarCodeReader.ViewModels;\n\nusing Xamarin.Forms;\nusing Xamarin.Forms.Xaml;\n\nnamespace BarCodeReader.Views\n{\n    [XamlCompilation(XamlCompilationOptions.Compile)]\n    public partial class MainMenuView : ContentPage\n    {\n        private MainMenuViewModel viewModel;\n        public MainMenuView()\n        {\n            InitializeComponent();\n            BindingContext = viewModel = new MainMenuViewModel();\n            RegisterMesssages();\n        }\n\n        private void RegisterMesssages()\n        {\n            MessagingCenter.Subscribe\u003cMainMenuViewModel\u003e(this, \"NoScanResultToClear\", (m) =\u003e\n            {\n                if (m != null)\n                {\n                    DisplayAlert(\"Warning !\", \"No scan result to clear.\", \"OK\");\n                }\n            });\n\n            MessagingCenter.Subscribe\u003cMainMenuViewModel\u003e(this, \"NoScanResultToShare\", (m) =\u003e\n            {\n                if (m != null)\n                {\n                    DisplayAlert(\"Warning !\", \"No scan result to share.\", \"OK\");\n                }\n            });\n        }\n    }\n}\n```\n\n### View Model code\n\n```c#\nusing System.Threading.Tasks;\nusing System.Windows.Input;\nusing Xamarin.Essentials;\nusing Xamarin.Forms;\nusing ZXing.Net.Mobile.Forms;\n\nnamespace BarCodeReader.ViewModels\n{\n    public class MainMenuViewModel : BaseViewModel\n    {\n        public MainMenuViewModel()\n        {\n            Title = \"Barcode Reader\";\n            ScanCommand = new Command(async () =\u003e await Scannning());\n            ClearResultCommand = new Command(ClearResult);\n            ShareResultCommand = new Command(async () =\u003e await ShareResult());\n        }\n\n\n\n        private async Task ShareText(string text)\n        {\n            await Share.RequestAsync(new ShareTextRequest\n            {\n                Text = text,\n                Title = \"Share\"\n            });\n        }\n\n\n        // Share Scan result\n        private async Task ShareResult()\n        {\n            if (string.IsNullOrEmpty(ScanResult))\n            {\n                MessagingCenter.Send(this, \"NoScanResultToShare\");\n            }\n            else\n            {\n                await ShareText(ScanResult);\n            }\n        }\n\n\n        // Clear Scan result\n        private void ClearResult()\n        {\n            if (string.IsNullOrEmpty(ScanResult))\n            {\n                MessagingCenter.Send(this, \"NoScanResultToClear\");\n            }\n            else\n            {\n                ScanResult = \"\";\n            }\n        }\n\n\n        // Do scanning\n        private async Task Scannning()\n        {\n            var scanPage = new ZXingScannerPage\n            {\n                Title = \"Scanning...\",\n                BackgroundColor = Color.FromHex(\"#212223\")\n            };\n            await App.Current.MainPage.Navigation.PushAsync(scanPage);\n            scanPage.OnScanResult += (result) =\u003e\n            {\n                // Stop scanning\n                scanPage.IsScanning = false;\n\n                // Pop to page and show the result\n                Device.BeginInvokeOnMainThread(async () =\u003e\n                {\n                    await App.Current.MainPage.Navigation.PopAsync();\n                    ScanResult = result?.Text;\n                });\n            };\n        }\n\n        public ICommand ScanCommand { get; private set; }\n        public ICommand ClearResultCommand { get; private set; }\n        public ICommand ShareResultCommand { get; private set; }\n\n        private string _scanResult;\n        public string ScanResult\n        {\n            get { return _scanResult; }\n            set { SetProperty(ref _scanResult, value); }\n        }\n    }   \n}\n\n```\n\n### Screenshots\n\n\u003cimg src=\"BarCodeReader/screenshots/interface.png\" width=\"300\" height=\"500\" /\u003e\n\n\u003cimg src=\"BarCodeReader/screenshots/scanning.png\" width=\"300\" height=\"500\" /\u003e\n\n\u003cimg src=\"BarCodeReader/screenshots/ScanningResult.png\" width=\"300\" height=\"500\" /\u003e\n\n\u003cimg src=\"BarCodeReader/screenshots/shareScanResult.png\" width=\"300\" height=\"500\" /\u003e","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fegbakou%2Fbarcodereader","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fegbakou%2Fbarcodereader","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fegbakou%2Fbarcodereader/lists"}