Android Integration Guide

Importing DyScan

The easiest way to integrate DyScan is by using our Nexus repository, which is covered in this guide.

If you would rather include DyScan directly as a library, see the instructions here.

In the project-level build.gradle add the Dyneti Maven repository (credentials provided during integration):

allprojects {
    repositories {
        // Other repositories are here
        maven {
            credentials  {
                username = "nexusUsername"
                password = "nexusPassword"
            }
            url "https://nexus.dyneti.com/repository/maven-releases/"
            authentication {
                basic(BasicAuthentication)
            }
        }
    }
}

Default DyScan configuration includes the TensorFlow library. Since version 1.2.0, you can exclude it from DyScan if you prefer to use your own build of TensorFlow.

Default

In the app-level build.gradle add the dependency:

dependencies {
    // Other dependencies are here
    implementation 'com.dyneti.android.dyscan:dyscan:1.5.1'
}

TensorFlow excluded (DyScan 1.2.0+)

In the app-level build.gradle add the dependency:

dependencies {
    // Other dependencies are here
    implementation ('com.dyneti.android.dyscan:dyscan:1.5.1') {
        exclude module: 'tensorflow-lite'
    }
    implementation 'org.tensorflow:tensorflow-lite:2.1.0'
}

If you would rather integrate without using our Nexus repository, see Manually Importing the Library.

If you encounter the following error while building your project

Duplicate class kotlin.collections.jdk8.CollectionsJDK8Kt found in modules jetified-kotlin-stdlib-1.8.22 (org.jetbrains.kotlin:kotlin-stdlib:1.8.22) and jetified-kotlin-stdlib-jdk8-1.6.21 (org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.21)

Add the following dependency to your app-level build.gradle:

dependencies {
    // Fix duplicate class
    implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.0"))
}

Initializing DyScan (only for version 1.1.0 and up)

In your Application class add the following line to init DyScan.

public class DyScanApplication extends Application {

  //...

  @Override
  public void onCreate() {
    super.onCreate();
    //...
    DyScan.init(this, "{YOUR_API_KEY}");
    //...
  }
}

Camera features support

By default, DyScan uses uses-feature tags in its AndroidManifest.xml file to filter out devices that don't support the required camera features. This filtering affects the host app's supported device count in Google Play.

You can override this filtering by adding the below lines into your AndroidManifest.xml manifest tag section:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    ...

    <uses-feature android:name="android.hardware.camera" android:required="false" tools:replace="required" />
    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false" tools:replace="required" />

    ...
</manifest>

If you choose to override the default tags settings inAndroidManifest.xml, you should additionally check manually if the device is supported before calling DyScan functions to avoid a bad user experience (see below).

if (DyScan.isDeviceSupported(context)) {
    // open DyScanActivity
    Intent intent = new Intent(context, DyScanActivity.class);
    startActivityForResult(intent, SCAN_REQUEST_CODE);
} else {
    // alternate flow if device is not supported
}

Interfacing DyScan

If your app already has card.io, see the migrating from card.io guide.

Import the following DyScan classes in your Activity that will launch DyScan:

import com.dyneti.android.dyscan.DyScanActivity;
import com.dyneti.android.dyscan.CreditCard;

This example assumes that you're going to launch the scanner from a button, and that you've set the button's onClick handler in the layout XML via android:onClick="onScanPress". (If not, the process is analogous, just use the code inside this function). onScanPress is implemented as

public void onScanPress(View v) {
    Intent scanIntent = new Intent(this, DyScanActivity.class);

    // for version lower than 1.1.0
    scanIntent.putExtra(DyScanActivity.EXTRA_API_KEY, "{api_key_string}");
    
    // MY_SCAN_REQUEST_CODE (e.g., 1337) is arbitrary and is only used within this activity.
    startActivityForResult(scanIntent, MY_SCAN_REQUEST_CODE);
}

Next, override onActivityResult() to get the scan result.

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);

   if (requestCode == MY_SCAN_REQUEST_CODE) {
       if (data != null && data.hasExtra(DyScanActivity.EXTRA_SCAN_RESULT)) {
           CreditCard scanResult = data.getParcelableExtra(DyScanActivity.EXTRA_SCAN_RESULT);
           // Do stuff with results in scanResult 
       }
   }
}

If you are using Stripe, see this guide for how to implement these functions.

The CreditCard class contains fields String cardNumber, int expiryMonth, int expiryYear, boolean isFraud, and String cardOrientation. For the OCR-only version of DyScan, isFraud is always set to false, and expiryYear is the full four-digit year.

Customizing DyScanActivity

The DyScanActivity can be customized by passing EXTRAs along with the intent. This allows you to modify both the appearance and behavior of the Activity.

EXTRA	Description	Default Value
EXTRA_HELPER_TEXT_STRING	What to text to display to the user to guide them in scanning their card. It is highly recommended that you set this value; otherwise we will try to provide this text based on EXTRA_LANGUAGE.	Dependent on EXTRA_LANGUAGE
EXTRA_HELPER_TEXT_COLOR	The color to use to display the helper text.	Color.WHITE
EXTRA_HELPER_TEXT_SIZE_SP	The size of the helper text in sp unit.	18
EXTRA_HELPER_TEXT_FONT_FAMILY	The font family name of the helper text. The font needs to be placed in assets first.	Default font
EXTRA_HELPER_TEXT_POSITION	The position of the helper text. DyScanHelperTextPosition enum values: TOP, CENTER, BOTTOM	DyScanHelperTextPosition.BOTTOM
EXTRA_SHOW_HELPER_TEXT	Whether to show the helper text on screen.	true
EXTRA_SHOW_CORNERS	Whether to show the scan area outline	true
EXTRA_CORNER_THICKNESS	How thick to make the lines outlining the scan area, indicating to the user where to place their credit card. Input as a float.	15f
EXTRA_CORNER_INACTIVE_COLOR	The color to use in drawing the outline of the scan region when nothing of interest is detected.	Color.GRAY
EXTRA_CORNER_ACTIVE_COLOR	The color to use in drawing the outline of the scan region when corners are detected.	Color.CYAN
EXTRA_CORNER_COMPLETED_COLOR	The color to use in drawing the outline of the scan region when we have successfully scanned a card.	Color.GREEN
EXTRA_BACKGROUND_COLOR	The color to use to obscure everything outside the scan region in order to draw the user’s attention to the scan region.	Color.GRAY
EXTRA_BACKGROUND_OPACITY	The opacity to use when obscuring everything outside the scan region, as an integer ranging from 0 (transparent) to 255 (opaque).	115
EXTRA_SHOW_ROTATE_BUTTON	Whether to show the button which allows the user to rotate the scan region by 90 degrees, facilitating the scanning of vertical cards.	false
EXTRA_SHOW_MANUAL_ENTRY_BUTTON	Whether to show a button at the bottom of the screen allowing the user to choose to exit the scanning Activity.	false
EXTRA_MANUAL_ENTRY_STRING	The String to display on the manual entry button if shown. This should be set if you are showing the manual entry button.
EXTRA_SHOW_RESULT_OVERLAY	Whether to briefly show the scanned card number (and date, if present) as an overlay over the screen after a successful scan.	false
EXTRA_RESULT_OVERLAY_ALWAYS_HORIZONTAL	Whether to display number on completion horizontally in fixed position.	false
EXTRA_SHOW_DYNETI_LOGO	Whether to show a dark blue Dyneti logo and wordmark above the scan region.	true
EXTRA_SHOW_CARD_OVERLAY	Whether to show the overlay displaying a sample card number and expiration date hinting at the user to place their card in the scan region.	true
EXTRA_LANGUAGE	If EXTRA_HELPER_TEXT_STRING is set, this value is ignored, and setting that value is strongly recommended. Otherwise, when no helper text string is provided, we will attempt to use the inputted ISO 639-1 Code as a String to supply a String ourselves. If we do not have a String for this language code, or no language code is provided, we will fall back to English.	The default locale's language according to the device
EXTRA_LIGHT_TORCH_WHEN_DARK	Whether the phone will turn on the flashlight if multiple frames have appeared to be too dark. If set to false, torch toggle button will appear.	true
EXTRA_VIBRATE_ON_COMPLETION	Whether the device will vibrate once it has successfully extracted the credit card data from the images provided by the camera.	true
EXTRA_CARD_FRAME_CONTENT_DESCRIPTION	The content description of card scan frame.	"Align your card to this frame"
EXTRA_IS_CHALLENGE	Whether DyScanActivity is being used as a fraud check. This is currently only used for logging purposes, but in the future may impact behavior.	false
EXTRA_SIDEWAYS_SCANNING_ENABLED	Whether to allow cards to scan in sideways orientation. If set to true, vertical cards will be able to be scanned when positioned in the horizontal scan window. Note that EXTRA_SIDEWAYS_SCANNING_ENABLED and EXTRA_SHOW_ROTATE_BUTTON should not simultaneously be set to true.	false

If you want to have more control over the experience than DyScanActivity provides, we also offer a DyScanView.