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This guide is aimed at advanced users who want to create adyen integration for their custom android application. You also need to install Spree Adyen extension before.

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Note

The list of available library versions can be found on Official Adyen Documentation for Android integration Current newest version available at the moment of writing the tutorial is 5.13.1. This doc will be referring to the library version as YOUR_VERSION.

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Resources

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Overview

The integration consists of two main components:
  • Spree Adyen: Provides API for your client and receive payment result from Adyen
  • Your Android client app: Shows the Drop-in UI and handles payment flow

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Step 1: Import the library

Import the compatibility module:

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Import the module with Jet Compose

implementation "com.adyen.checkout:drop-in-compose:YOUR_VERSION"

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Import without Jet Compose

implementation "com.adyen.checkout:drop-in:YOUR_VERSION"

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Step 2: Create a checkout session

Create session using this endpoint. 
val sessionModel = SessionModel.SERIALIZER.deserialize(sessionsResponseJSON)
sessionsResponseJSON should contain:
  • sessionData - available as adyen_data in payment_session API response
  • id - available as adyen_id in payment_session API response
val sessionModel = SessionModel.SERIALIZER.deserialize(sessionsResponseJSON)

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Step 3

call CheckoutSessionProvider.createSession passing serialized session data (sessionModel) and dropInConfiguration dropInConfiguration example: 
val checkoutConfiguration = CheckoutConfiguration(
	    environment = environment,
	    clientKey = clientKey,
	    shopperLocale = shopperLocale, // Optional
	) {
	    // Optional: add Drop-in configuration.
	    dropIn {
	        setEnableRemovingStoredPaymentMethods(true)
	    }
	 
	    // Optional: add or change default configuration for the card payment method.
	    card {
	        setHolderNameRequired(true)
	        setShopperReference("...")
	    }
	 
	    // Optional: change configuration for 3D Secure 2.
	    adyen3DS2 {
	        setThreeDSRequestorAppURL("...")
	    }
	}
see also: https://docs.adyen.com/online-payments/build-your-integration/sessions-flow/?platform=Web&integration=Drop-in&version=6.18.1#create-instance environment - enum: live or test clientKey - client_key from payment_sessions endpoint shopperLocale - shopper locale in ISO format 
	// Create an object for the checkout session.
	val result = CheckoutSessionProvider.createSession(sessionModel, dropInConfiguration)
	 
	// If the payment session is successful, handle the result.
	// If the payment session encounters an error, handle the error.
	when (result) {
	    is CheckoutSessionResult.Success -> handleCheckoutSession(result.checkoutSession)
	    is CheckoutSessionResult.Error -> handleError(result.exception)
	}

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Step 4: Launch and show Drop-in

	override fun onDropInResult(sessionDropInResult: SessionDropInResult?) {
	   when (sessionDropInResult) {
	      // The payment finishes with a result.
	      is SessionDropInResult.Finished -> handleResult(sessionDropInResult.result)
	      // The shopper dismisses Drop-in.
	      is SessionDropInResult.CancelledByUser ->
	      // Drop-in encounters an error.
	      is SessionDropInResult.Error -> handleError(sessionDropInResult.reason)
	      // Drop-in encounters an unexpected state.
	      null ->
	   }
	}

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Step 5: Create the Drop-in launcher

DropIn.startPayment, passing:
  • dropInLauncher - The Drop-in launcher object
  • checkoutSession - result of CheckoutSessionProvider.createSession
  • dropInConfiguration - Your Drop-in configuration
Example: 
	import com.adyen.checkout.dropin.compose.startPayment
	import com.adyen.checkout.dropin.compose.rememberLauncherForDropInResult
	 
	@Composable
	private fun ComposableDropIn() {
	    val dropInLauncher = rememberLauncherForDropInResult(sessionDropInCallback)
	 
	    DropIn.startPayment(dropInLauncher, checkoutSession, dropInConfiguration)
	}

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Get payment outcome

  1. Wait for backend to process the payment
  2. Continue shopping experience

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1. Wait for backend to process the payment

backend will change the state of payment_session to one of the following state
  • pending - chosen payment method can take a while to complete
  • completed - payment resulted in success, order completed
  • canceled - payment canceled, payment is void
  • refused - payment failed

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2. Continue shopping experience

if succeed - order is processed and completed if failed - payment can be retried using new payment session
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