Get Started With Barcode Scanning#

In this guide you will learn step by step how to add barcode capture to your application. Roughly, the steps are:

  • Include the ScanditBarcodeCapture library and its dependencies to your project, if any.

  • Create a new data capture context instance, initialized with your license key.

  • Create a barcode capture settings and enable the barcode symbologies you want to read in your application.

  • Create a new barcode capture mode instance and initialize it with the settings created above.

  • Register a barcode capture listener to receive scan events. Process the successful scans according to your application’s needs, e.g. by looking up information in a database. After a successful scan, decide whether more codes will be scanned, or the scanning process should be stopped.

  • Obtain a camera instance and set it as the frame source on the data capture context.

  • Display the camera preview by creating a data capture view.

  • If displaying a preview, optionally create a new overlay and add it to data capture view for a better visual feedback.


Before starting with adding a capture mode, make sure that you have a valid Scandit Data Capture SDK license key and that you added the necessary dependencies. If you have not done that yet, check out this guide.


You can retrieve your Scandit Data Capture SDK license key, by signing in to your account at

External dependencies#

The Scandit Data Capture SDK modules depend on a few standard libraries that you can find listed below. If you are including the Scandit Data Capture SDK through Gradle or Maven, all of these dependencies are automatically pulled in and there is no need for you to do anything further. If on the other hand you are directly adding the AAR files to the project, you will have to add these dependencies yourself.




  • org.jetbrains.kotlin:kotlin-stdlib:[version]

  • androidx.annotation:annotation:[version]

  • com.squareup.okhttp3:okhttp:3.12.10


  • org.jetbrains.kotlin:kotlin-stdlib:[version]

  • androidx.annotation:annotation:[version]


No dependencies


No dependencies


  • org.jetbrains.kotlin:kotlin-stdlib:[version]

  • androidx.annotation:annotation:[version]


  • org.jetbrains.kotlin:kotlin-stdlib:[version]

  • androidx.annotation:annotation:[version]

Internal dependencies#

Some of the Scandit Data Capture SDK modules depend on others to work. Below is a list of these interdependencies.




No dependencies


  • ScanditCaptureCore


No dependencies


No dependencies


  • ScanditCaptureCore

  • ScanditTextCaptureBase


  • ScanditCaptureCore

  • ScanditTextCaptureBase

Create the Data Capture Context#

The first step to add barcode 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 --");

Configure the Barcode Scanning Behavior#

Barcode scanning is orchestrated by the BarcodeCapture data capture mode. This class is the main entry point for scanning barcodes. It is configured through BarcodeCaptureSettings and allows to register one or more listeners that will get informed whenever new codes have been recognized.

For this tutorial, we will setup barcode scanning for a small list of different barcode types, called symbologies. The list of symbologies to enable is highly application specific. We recommend that you only enable the list of symbologies your application requires.

BarcodeCaptureSettings settings = new BarcodeCaptureSettings();
settings.enableSymbology(Symbology.CODE128, true);
settings.enableSymbology(Symbology.CODE39, true);
settings.enableSymbology(Symbology.QR, true);
settings.enableSymbology(Symbology.EAN8, true);
settings.enableSymbology(Symbology.UPCE, true);
settings.enableSymbology(Symbology.EAN13_UPCA, true);

If you are not disabling barcode capture immediately after having scanned the first code, consider setting the BarcodeCaptureSettings.codeDuplicateFilter to around 500 or even -1 if you do not want codes to be scanned more than once.

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

barcodeCapture = BarcodeCapture.forDataCaptureContext(dataCaptureContext, settings);

Register the Barcode Capture Listener#

To get informed whenever a new code has been recognized, add a BarcodeCaptureListener through BarcodeCapture.addListener() and implement the listener methods to suit your application’s needs.

First implement the BarcodeCaptureListener interface. For example:

public void onBarcodeScanned(@NonNull BarcodeCapture barcodeCapture,
        @NonNull BarcodeCaptureSession session, @NonNull FrameData frameData) {
    List<Barcode> recognizedBarcodes = session.getNewlyRecognizedBarcodes();
    // Do something with the barcodes.

Then add the listener:


Use the Built-in Camera#

The data capture context supports using different frame sources to perform recognition on. Most applications will use the built-in camera of the device, e.g. the world-facing camera of a device. The remainder of this tutorial will assume that you use the built-in camera.

When using the built-in camera there are recommended settings for each capture mode. These should be used to achieve the best performance and user experience for the respective mode. The following couple of lines show how to get the recommended settings and create the camera from it:

CameraSettings cameraSettings = BarcodeCapture.createRecommendedCameraSettings();

// Depending on the use case further camera settings adjustments can be made here.

Camera camera = Camera.getDefaultCamera();

if (camera != null) {

Because the frame source is configurable, the data capture context must be told which frame source to use. This is done with a call to DataCaptureContext.setFrameSource():


The camera is off by default and must be turned on. This is done by calling FrameSource.switchToDesiredState() with a value of FrameSourceState.ON:

if (camera != null) {


On Android the Scandit Data Capture SDK is not lifecycle aware which means it is not able to turn off the camera when the app goes in the background etc. which has to be done as otherwise the camera is locked for other apps. This responsibility to do this is left to the implementer. Make sure that you always turn the camera off in the activity’s onPause lifecycle method. Often this means that you want to (re)start it in onResume. You can see a way of doing this in all of the samples.

There is a separate guide for more advanced camera functionality.

Use a Capture View to Visualize the Scan Process#

When using the built-in camera as frame source, you will typically want to display the camera preview on the screen together with UI elements that guide the user through the capturing process. To do that, add a DataCaptureView to your view hierarchy:

DataCaptureView dataCaptureView = DataCaptureView.newInstance(this, dataCaptureContext);

To visualize the results of barcode scanning, the following overlay can be added:

BarcodeCaptureOverlay overlay = BarcodeCaptureOverlay.newInstance(barcodeCapture, dataCaptureView);

Disabling Barcode Capture#

To disable barcode capture, for instance as a consequence of a barcode being recognized, set BarcodeCapture.isEnabled to false. There will not be any new results until the capture mode is enabled again. Note that disabling the capture mode does not stop the camera, the camera continues to stream frames until it is turned off.

What’s next?

To dive further into the Scandit Data Capture SDK we recommend the following articles: