High-Speed Single Scanning

What is SparkScan?

For most people integrating scanning for the first time our pre-built component SparkScan is the best and quickest place to start. It includes a pre-built scanning interface that floats on top of any native application.

This bundles multiple scanning features together and addresses many common challenges associated with scanning on smart devices.


Run SparkScan Samples


A simple sample that demonstrates how to populate a list of scanned barcodes using the Scandit SparkScan API.

SparkScan Quick Start Guide

Add the SDK to your App


  • The latest stable version of Visual Studio.

  • A Xamarin.iOS project with minimum iOS deployment target of 13.0 or higher. Or a Xamarin.Android project with target SDK version 23 (Android 6, Marshmallow) or higher.

  • A valid Scandit Data Capture SDK license key. You can sign up for a free test account at ssl.scandit.com.


Android devices running the Scandit Data Capture SDK need to have a GPU or the performance will drastically decrease.

Add the SDK

The Scandit Data Capture SDK is distributed as NuGet packages.

You will always need to add the Scandit.DataCapture.Core.Xamarin.Forms package, which contains the core functionality used by the other data capture packages. In addition, depending on the data capture task, you will need a reference to:

  • Scandit.DataCapture.Barcode.Xamarin.Forms if you want to use barcode-related functionality such as barcode capture.

You can safely remove Scandit.DataCapture.Barcode.Xamarin.Forms dependency if you are not going to use its features.

Get a License Key

  1. Sign up or Sign in to your Scandit account

  2. Create a project

  3. Create a license key by specifying your bundle ID

If you have a paid subscription, please reach out to support@scandit.com if you need a new license key.

Additional Information


On Android, the Scandit SDK uses content providers to initialize the scanning capabilities properly. If your own content providers depend on the Scandit SDK, choose an initOrder lower than 10 to make sure the SDK is ready first.

If not specified, initOrder is zero by default and you have nothing to worry about.

Check the official <provider> documentation.

  • Camera Permissions: When using the Scandit Data Capture SDK you will want to set the camera as the frame source for various capture modes. On Xamarin.iOS, you have to set the “Privacy - Camera Usage Description” field in the Info.plist file and you have to request camera permissions in your own application before starting scanning. To see how you can achieve this, take a look at our samples: Run our Sample Apps.

Get Started With SparkScan

In this guide you will learn step by step how to add SparkScan to your application.

Roughly, the steps are:

  1. Create a new Data Capture Context instance.

  2. Configure the Spark Scan Mode.

  3. Create the SparkScanView with the desired settings and bind it to the application’s lifecycle.

  4. Register the listener to be informed when new barcodes are scanned and update your data whenever this event occurs.

1. Create a New Data Capture Context Instance

The first step to add capture capabilities to your application is to create a new Data Capture Context. The context expects a valid Scandit Data Capture SDK license key during construction.

DataCaptureContext dataCaptureContext = DataCaptureContext.ForLicenseKey("-- ENTER YOUR SCANDIT LICENSE KEY HERE --");

2. Configure the SparkScan Mode

The SparkScan Mode is configured through SparkScanSettings and allows you to register one or more listeners that are informed whenever a new barcode is scanned.

For this tutorial, we will set up SparkScan for scanning EAN13 codes. Change this to the correct symbologies for your use case (for example, Code 128, Code 39…).

SparkScanSettings settings = new SparkScanSettings();
HashSet<Symbology> symbologies = new HashSet<Symbology>()

Next, create a SparkScan instance with the settings initialized in the previous step:

SparkScan sparkScan = new SparkScan(settings);

3. Setup the Spark Scan View

The SparkScan built-in user interface includes the camera preview and scanning UI elements. These guide the user through the scanning process.

The SparkScanView appearance can be customized through SparkScanViewSettings.

SparkScanViewSettings viewSettings = new SparkScanViewSettings();
// setup the desired appearance settings by updating the fields in the object above

By adding a SparkScanView, the scanning interface (camera preview and scanning UI elements) will be added automatically to your application.

Add a SparkScanView to your view hierarchy:

Construct a new SparkScan view. The SparkScan view should be added as the last item to AbsoluteLayout or RelativeLayout layouts, to make sure other UI components are visible.

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
      <!-- Your other UI components comes here before SparkScanView -->
        DataCaptureContext="{Binding DataCaptureContext}"
        SparkScan="{Binding SparkScan}"
        SparkScanViewSettings="{Binding ViewSettings}">

Additionally, make sure to call SparkScanView.OnAppearing() and SparkScanView.OnDisappearing() in your Page.OnAppearing and Page.OnDisappearing callbacks, to make sure that start up time is optimal and scanning is stopped when the app is going in the background.

protected override void OnAppearing()

protected override void OnDisappearing()

4. Register the Listener to Be Informed When a New Barcode Is Scanned

To keep track of the barcodes that have been scanned, implement the ISparkScanListener interface and register the listener to the SparkScan mode.

// Register self as a listener to monitor the spark scan session.

ISparkScanListener.OnBarcodeScanned() is called when a new barcode has been scanned. This result can be retrieved from the first object in the provided barcodes list: SparkScanSession.NewlyRecognizedBarcodes. Please note that this list only contains one barcode entry. When a barcode is scanned, it is possible to emit a sound and a visual feedback via SparkScanView.EmitFeedback().

public void OnBarcodeScanned(SparkScan sparkScan, SparkScanSession session, IFrameData? data)
    if (session.NewlyRecognizedBarcodes.Count == 0)

    // Gather the recognized barcode
    Barcode barcode = session.NewlyRecognizedBarcodes[0];

    // This method is invoked from a recognition internal thread.
    // Run the specified action in the UI thread to update the internal barcode list.
    Device.InvokeOnMainThreadAsync(() =>
        // Update the internal list and the UI with the barcode retrieved above
        this.latestBarcode = barcode;

        // Emit sound and vibration feedback
        this.sparkScanView.EmitFeedback(new SparkScanViewSuccessFeedback());

Alternatively to register ISparkScanListener interface it is possible to subscribe to corresponding events. For example:

sparkScan.BarcodeScanned += (object sender, SparkScanEventArgs args) =>
    if (args.Session.NewlyRecognizedBarcodes.Count == 0)

    // Gather the recognized barcode
    Barcode barcode = args.Session.NewlyRecognizedBarcodes[0];

    // This method is invoked from a recognition internal thread.
    // Run the specified action in the UI thread to update the internal barcode list.
    Device.InvokeOnMainThreadAsync(() =>
        // Update the internal list and the UI with the barcode retrieved above
        this.latestBarcode = barcode;

        // Emit sound and vibration feedback
        this.sparkScanView.EmitFeedback(new SparkScanViewSuccessFeedback());

5. Scan Some Barcodes

Now that you’re up and running, go find some barcodes to scan. Don’t feel like getting up from your desk? Here’s a handy pdf of barcodes you can print out.

Learn More About SparkScan

UI overview

The SparkScan’s UI is minimal, meant to be overlayed on top of any application without the need to adapt the existing app - while offering the best user experience.

Three main elements compose the UI:

_images/mini-preview.png _images/scan-button.png

Mini preview: A small camera preview screen giving a visual confirmation while aiming at the code. This is placed in the top right corner, where the phone camera is located. Its size depends on the scanning mode enabled.

Trigger button: A large-sized floating button that users can drag up and down to position it in the most convenient and ergonomic place. This eliminates the need to look at the screen to trigger scanning.

Settings Toolbar: A quick-access toolbar that includes controls of settings (like the torch, haptics feedback etc.), scan modes (like switching to continuous scanning, enabling the target mode etc,) and more. More info on the scanning modes in the following section.

NOTE: Additional UI elements are available for developers to use if their app logic requires displaying errors or additional feedback while scanning. More information in Customisation and advanced capabilities.


Scanning Modes Supported

SparkScan offers different scanning modes, to optimally fit different use-cases and user preferences.

These modes change the workflow and the way the user scans the barcodes.
They can be toggled manually by the end users, or set a priori by the developer.

SparkScan offers two scanning modes:

  • Default mode: Ideal for close-range and fast paced scanning. This mode will display a small camera preview to aid with aiming.

  • Target mode: Ideal for scanning scenarios where precision is important. This mode will display a big camera preview with a target to precisely select the barcode to scan. This is useful when multiple barcodes are in view. As this mode allows you to choose the zoom level, it is also ideal for long-range scanning (e.g. to scan a label at the bottom shelf).

And two scanning behaviors:

  • Single scan: the user needs to trigger the scanner every time to scan a barcode. This allows for a more controlled scanning.

  • Continuous scan: Scan barcodes consecutively. The user needs to trigger the scanner once and barcodes will be scanned without any further interaction before each scan. This allows for a smoother experience when multiple barcodes need to be scanned consecutively.

_images/modes1.png _images/modes2.png _images/modes3.png

Scanning Mode: Default.

Scanning Mode: Default.

Scanning Mode: Target.

Scanning Behavior: Single Scan.

Scanning Behavior: Continuous Scan.

Scanning Behavior: Single Scan.

NOTE: By default, scanning modes and scanning behaviors can be toggled by the end user acting on the setting toolbar - to allow for the maximum flexibility.
Developers can always change the initial configuration of the scanner or select a specific configuration removing the possibility to toggle it.
More information in Customisation and advanced capabilities.

Workflow Description

  • When SparkScan is started, the UI presents just the trigger button, collapsed on the side.

  • To start scanning, the user can:

    • swipe to open the button, then tap on it.

    • tap on the collapsed trigger button.

_images/workflow1.gif _images/workflow2.gif

Swipe and tap to start the scanner.

Tap to start the scanner.

  • When the scanner is active, the mini preview becomes visible.

  • Depending on the scanning mode enabled, the workflow will behave differently:

    • In Single Scan, upon scan the user will receive audio/haptic feedback confirming the scan, and the mini preview will display the scanned barcode for a small amount of time. The scanner will need to be restarted to scan a new code.

    • In Continuous Scan, upon scan the user will receive audio/haptic feedback confirming the scan. The mini preview keeps showing the camera preview, ready to scan a new code.

_images/listbuilding1.gif _images/listbuilding2.gif

Single Scan.

Continuous Scan.

  • Upon completing the scanning process (or to interact with the customer app layer), the user can tap in any area outside the trigger button and the mini preview. This collapses the scanner button back to the side, going back to the initial state.


Collapse the SparkScan UI.

Supported Devices

Runs on iOS and Android devices.

Supported Symbologies

SparkScan supports all of the major symbologies listed here: Barcode Symbologies except DotCode, MaxiCode and postal codes (KIX, RM4SCC, LAPA 4SC and USPS Intelligent Mail).

If you are not familiar with the symbologies that are relevant for your use case, you can use capture presets that are tailored for different verticals (e.g. retail, logistics, etc.).

For more symbology specific information, please refer to this link.

Customisation and advanced capabilities

SparkScan offers an out-of-the-box experience optimized for efficiency and a frictionless worker experience. This experience has been crafted after many user testing and with the product knowledge gained in the many years of Scandit.
While this out-of-the-box experience will suit most use-cases, we understand there are some special cases in which some configuration is still needed.
In this page, we collect the main customization and advanced settings you may need to customize SparkScan to obtain the best experience possible.

Advanced capabilities

Hold-to-scan gesture

In addition to the standard tap-to-scan interaction, in which the users tap the trigger button to enable the scanner, users can hold down the scan button to perform a hold-to-scan interaction. In this case, regardless of the scanning behavior (whether is Single Mode or Continuous Mode), the scanner will be active (scanning barcodes) as long as the button is pressed.

Developers can disable this gesture via SparkScanViewSettings.HoldToScanEnabled.

EXAMPLE: to create a workflow in which only Single Scan is possible, developers will need to:

Control the Scanner through a Hardware Button

Allowing the end user to control the scanner with hardware buttons can be useful if your users typically wear gloves. It can also improve ergonomics in some workflows.

SparkScan offers a built-in API to let you do this via SparkScanViewSettings.HardwareTriggerEnabled.

Trigger the Error State

You may want to introduce logic in your app to show an error message when scanning specific barcodes (e.g. barcodes already added to the list, barcodes from the wrong lot etc.). SparkScan offers a built-in error state you can easily set to trigger an error feedback prompt to the user. You will be able to customize:

  • The text message

  • The timeout of the error message: the scanner will be paused for the specified amount of time, but the user can quickly restart the scanning process by tapping the trigger button

  • The color of the flashing screen upon scan. You can control the color via ISparkScanViewFeedback.

  • The color of the highlight for the scanned barcode.

An error example is here reported:

self.sparkScanView.emitFeedback(SparkScanViewErrorFeedback(message: "This code should not have been scanned", resumeCapturingDelay: 6, visualFeedbackColor: UIColor.red))

NOTE: you can have different error states triggered by different logic conditions. For example you can trigger an error state when a wrong barcode is scanned, and another one when a duplicate barcode is scanned. These errors can show different colors and have different timeouts.

_images/error-duplicate.png _images/error-wrong.png

NOTE: a high timeout (e.g. >10s) typically requires the users to interact with the UI to start scanning again. This is a good choice when you want to interrupt the scanning workflow (e.g. because a wrong barcode is scanned and some actions need to be performed). A small timeout (e.g. <2s) could allow the user to scan again without having to interact with the app, just momentarily pausing the workflow to acknowledge that a “special” barcode has been scanned.


In this example, a first error is triggered when a “duplicate” barcode is scanned (in blue) - stopping the scanner for 2s. Users do not need to restart the scanner manually, as the timeout is limited. A second error is triggered when an “error” barcode is scanned, with a long timeout (60s) that requires the user to trigger the scanner again.

Increase the precision of your scanning workflow

In scenarios where numerous barcodes are close together or in crowded environments, accurately selecting the right barcode can be difficult. To address this challenge, a new workflow that incorporates an aimer in the camera preview is recommended so that users can precisely target and scan intended barcodes.

As a developer you can select two different SparkScan workflow by picking a SparkScanScanningPrecision value:



Depending on the selection, the behavior of the preview will be different.


Default workflow VS Accuracy workflow.

DEFAULT: the standard workflow for use cases in which the accurate selection of a barcode (e.g. long range scanning or many barcode close together) is occasional.

  • Preview only visible when scanning (hidden otherwise).

  • Two scanning modes:

    • Default mode: Mini preview without aimer (barcodes can be scanned anywhere in the mini-preview).

    • Target mode: big preview with an aimer to precisely scan barcodes far away or close together.

ACCURACY: the workflow for use cases where you mainly want to select a barcode (among many) or you need to look through the preview at all times (to ensure the right scan).

  • Preview always visible, scanning only active when tapping/holding the trigger button

  • Two scanning modes:

    • Default Mode: Mini preview with an aimer, only scanning aimed barcodes to increase precision

    • Expanded mode: big preview with an aimer in case you want to be more precise or you need to zoom in.


Accuracy mode example.

Add More Advanced Scanning Modes to the Setting Toolbar

SparkScan is our best solution for high-speed single scanning and scan-intensive workflows. Depending on your use case, you can use SparkScan scan in conjunction with other Scandit advanced scanning modes, such as Barcode FindMatrixScan AR or MatrixScan Count, to speed up your workflows.
SparkScan offers pre-build buttons you can add to the setting toolbar to easily move to different scan modes from within the SparkScan UI.

First you will need to show these buttons:

// Show the MatrixScan Count button
sparkScanView.BarcodeCountButtonVisible = true;
_images/icons-default.png _images/toolbar-advanced.png

Standard toolbar.

Toolbar with advanced modes icons shown.

In addition you have to subscribe to the SparkScanView via SparkScanView.BarcodeCountButtonTapped or SparkScanView.FastFindButtonTapped. After that you will receive callbacks when FastFind button or Barcode Count button is tapped from the toolbar.

this.sparkScanView.BarcodeCountButtonTapped += BarcodeCountButtonTapped;
this.sparkScanView.FastFindButtonTapped += FastFindButtonTapped;


private void FastFindButtonTapped(object sender, SparkScanViewEventArgs e)


private void BarcodeCountButtonTapped(object sender, SparkScanViewEventArgs e)



Customize colors and texts

All texts (guidance inside the trigger button and hints’ messages), colors and opacity of the SparkScan UI elements (trigger button, setting toolbar, toasts) can be customized to match the desired language and color scheme.

Please refer to SparkScanView for the full list of available parameters.

_images/custom-red.png _images/custom-green.png

Hide Controls from the Setting Toolbar

The Setting Toolbar comes with default buttons included, as detailed in Learn More About SparkScan.

In some cases you want to avoid end users from accessing these controls, for example:

  • to prevent them disabling audio feedback on scan, as the work environment is always noisy

  • to prevent them toggling the continuous mode, as you want them to pick items one by one

  • etc.

To do that, you can change the visibility of these buttons, hiding them from the setting toolbar.

sparkScanView.SoundModeButtonVisible = false;
sparkScanView.ScanningBehaviorButtonVisible = false;

Please refer to SparkScanView for the full list of parameters.

_images/icons-default.png _images/icons-reduced.png

Default icons shown.

Only two icons left.