Android - GoogleSignInResult always failing

Question

I have followed the tutorial here: https://developers.google.com/identity/sign-in/android/start-integrating to integrate Google sign in into my app.

However, the GoogleSignInResult.isSuccess() is always false. GoogleSignInStatusCodes.getStatusCodeString(googleSignInResult.getStatus().getStatusCode()) shows INTERNAL_ERROR. The docs here say "retrying should solve the problem", but it doesn't.

Any ideas on what's wrong?

Similar question here, but I have added the json file.

Answer 1

The problem was that I was running the app from Android Studio (without setting up signingConfig), so the app wasn't signed with my certificate, which Google Sign-in requires.

Answer 2

If you run from Android studio without signingConfigs, then it is using your debug key store to sign. You can try register your package name + debug key SHA1 in dev console for easy development:

Test google signin on Android in development phase