Google Pay

Learn how to accept payments using Google Pay.

Google Pay allows customers to make payments in your app or website using any credit or debit card saved to their Google Account, including those from Google Play, YouTube, Chrome, or an Android device. Use the Google Pay API to request any credit or debit card stored in your customer’s Google account.

Google Pay is fully compatible with Stripe’s products and features (for example, subscriptions), allowing you to use it in place of a traditional payment form whenever possible. Use it to accept payments for physical goods, donations, subscriptions, and more.

Accept a payment using Google Pay in your Android app

GooglePayLauncher, part of the Stripe Android SDK, is the fastest and easiest way to start accepting Google Pay in your Android apps.

Set up your integration

To use Google Pay, first enable the Google Pay API by adding the following to the <application> tag of your AndroidManifest.xml:

AndroidManifest.xml

<application>
  ...
  <meta-data
    android:name="com.google.android.gms.wallet.api.enabled"
    android:value="true" />
</application>

This guide assumes you’re using the latest version of the Stripe Android SDK.

build.gradle

dependencies {
    implementation 'com.stripe:stripe-android:20.21.1'
}

For more details, see Google Pay’s Set up Google Pay API for Android.

Instantiate GooglePayLauncher

Next, create an instance of GooglePayLauncher in your Activity or Fragment. This must be done in Activity#onCreate().

GooglePayLauncher.Config exposes both required and optional properties that configure GooglePayLauncher. See GooglePayLauncher.Config for more details on the configuration options.

class CheckoutActivity : AppCompatActivity() {
    // fetch client_secret from backend
    private lateinit var clientSecret: String

    private lateinit var googlePayButton: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.checkout_activity)

        PaymentConfiguration.init(this, PUBLISHABLE_KEY)

        googlePayButton = findViewById<Button>(R.id.google_pay_button)

        val googlePayLauncher = GooglePayLauncher(
            activity = this,
            config = GooglePayLauncher.Config(
                environment = GooglePayEnvironment.Test,
                merchantCountryCode = "US",
                merchantName = "Widget Store"
            ),
            readyCallback = ::onGooglePayReady,
            resultCallback = ::onGooglePayResult
        )

        googlePayButton.setOnClickListener {
            // launch `GooglePayLauncher` to confirm a Payment Intent
            googlePayLauncher.presentForPaymentIntent(clientSecret)
        }
    }

    private fun onGooglePayReady(isReady: Boolean) {
        // implemented below
    }

    private fun onGooglePayResult(result: GooglePayLauncher.Result) {
        // implemented below
    }
}

After instantiating GooglePayLauncher, the GooglePayLauncher.ReadyCallback instance is called with a flag indicating whether Google Pay is available and ready to use. This flag can be used to update your UI to indicate to your customer that Google Pay is ready to be used.

class CheckoutActivity : AppCompatActivity() {
    // continued from above

    private lateinit var googlePayButton: Button

    private fun onGooglePayReady(isReady: Boolean) {
        googlePayButton.isEnabled = isReady
    }
}

Launch GooglePayLauncher

After Google Pay is available and your app has obtained a PaymentIntent or SetupIntent client secret, launch GooglePayLauncher using the appropriate method. When confirming a PaymentIntent, use GooglePayLauncher#presentForPaymentIntent(clientSecret). When confirming a SetupIntent, use GooglePayLauncher#presentForSetupIntent(clientSecret).

class CheckoutActivity : AppCompatActivity() {
    // fetch client_secret from backend
    private lateinit var clientSecret: String

    private lateinit var googlePayButton: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // instantiate `googlePayLauncher`

        googlePayButton.setOnClickListener {
            // launch `GooglePayLauncher` to confirm a Payment Intent
            googlePayLauncher.presentForPaymentIntent(clientSecret)
        }
    }
}

Handle the result

Finally, implement GooglePayLauncher.ResultCallback to handle the result of the GooglePayLauncher operation.

The result can be GooglePayLauncher.Result.Completed, GooglePayLauncher.Result.Canceled, or GooglePayLauncher.Result.Failed.

class CheckoutActivity : AppCompatActivity() {
    // continued from above

    private fun onGooglePayResult(result: GooglePayLauncher.Result) {
        when (result) {
            GooglePayLauncher.Result.Completed -> {
                // Payment succeeded, show a receipt view
            }
            GooglePayLauncher.Result.Canceled -> {
                // User canceled the operation
            }
            is GooglePayLauncher.Result.Failed -> {
                // Operation failed; inspect `result.error` for the exception
            }
        }
    }
}

Going live with Google Pay

Follow Google’s instructions to request production access for your app. Choose the integration type Gateway when prompted, and provide screenshots of your app for review.

After your app has been approved, test your integration in production by setting the environment to GooglePayEnvironment.Production, and launching Google Pay from a signed, release build of your app. Remember to use your live mode API keys. You can use a PaymentIntent with capture_method = manual to process a transaction without capturing the payment.

Creating a PaymentMethod

If you confirm your payment on your server, you can use GooglePayPaymentMethodLauncher to only collect a PaymentMethod instead of confirm payment.

class CheckoutActivity : AppCompatActivity() {
    private lateinit var googlePayButton: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.checkout_activity)

        PaymentConfiguration.init(this, PUBLISHABLE_KEY)

        googlePayButton = findViewById<Button>(R.id.google_pay_button)

        val googlePayLauncher = GooglePayPaymentMethodLauncher(
            activity = this,
            config = GooglePayPaymentMethodLauncher.Config(
                environment = GooglePayEnvironment.Test,
                merchantCountryCode = "FR",
                merchantName = "Widget Store"
            ),
            readyCallback = ::onGooglePayReady,
            resultCallback = ::onGooglePayResult
        )

        googlePayButton.setOnClickListener {
            googlePayLauncher.present(
                currencyCode = "EUR",
                amount = 2500
            )
        }
    }

    private fun onGooglePayReady(isReady: Boolean) {
        googlePayButton.isEnabled = isReady
    }

    private fun onGooglePayResult(
        result: GooglePayPaymentMethodLauncher.Result
    ) {
        when (result) {
            is GooglePayPaymentMethodLauncher.Result.Completed -> {
                // Payment details successfully captured.
                // Send the paymentMethodId to your server to finalize payment.
                val paymentMethodId = result.paymentMethod.id
            }
            GooglePayPaymentMethodLauncher.Result.Canceled -> {
                // User canceled the operation
            }
            is GooglePayPaymentMethodLauncher.Result.Failed -> {
                // Operation failed; inspect `result.error` for the exception
            }
        }
    }
}