Android: How to get Refresh Token by Google Sign-In API?

Question

Currently, I am working on the application where user able to login with Google. As part of the login process, we need to send Google ACCESS TOKEN and REFRESH TOKEN to serve

Answer 1

You should use the server auth code flow via Auth.GOOGLE_SIGN_IN_API: get an server auth code on Android client, send to your server, server exchanges the code for refresh and access token (with a secret). There are more details in this blog post as well.

Also, if you are using GoogleAuthUtil.getToken for access token now, you do want to check out this Google Sign-In best practice blog post to see how to migrate to the recommended flow to ensure security and best UX.