PayPal integration in Android WebView not working

General information

• SDK version: Javascript SDK, version 3.52.1
• Environment: Production
• Browser and OS: WebView (Chrome 77.0.3865.73), Android 9

Issue description

We use the Braintree JavaScript SDK for our PayPal checkout. The checkout is used on our site, as well as rendered from within our mobile apps. Everything works fine, except for the WebView in the Android app.

Here’s a step-by-step:

1. Initiate the PayPal flow. This is done by calling tokenize on an PayPal instance that we created using braintree.paypal.create({...})
2. A PayPal log in screen is rendered where only e-mail address can be entered. We enter a valid e-mail address.
3. Next screen rendered is one where PayPal prompts for a password. We enter the correct password.
4. We are redirected to another PayPal login screen, this time with both e-mail address and password. The same credentials are entered again.
5. We are redirected to a PayPal page with a reCAPTCHA
6. After completing the reCAPTCHA challenge, we arrive at a “pay with credit card” page with a button to “Agree & Continue”.
7. When clicking the “Agree & Continue” button, a spinner with “Processing” appears, and when it disappears we are left with a blank white page.

When trying the same checkout on a browser on the same device, we are prompted with only one login flow (the one where email address and password in rendered together). This time, no reCAPTCHA challenge. After pressing “Agree & Continue”, we return to our checkout.

Any ideas why this is?

[scannillo]

Hello. To help us get a better understanding of your integration, are you using the pop-up bridge? Since by default WebViews cannot open pop-ups, which is what the PayPal flow relies on, we offer this pop-up bridge as a solution for integrations embedded in a WebView. If you are not using the pop-up bridge, we can’t guarantee that your current setup will work, as a PayPal checkout does not officially support WebViews.

[crookedneighbor]

@ZoltanSzokodi please reach out to our support team about this: https://help.braintreepayments.com/