Android Google SignIn not working in debug mode: GoogleSignInResult is false

Question

I have been following this tutorial to get Google SignOn going: https://developers.google.com/identity/sign-in/android/start-integrating

When I run my application lo

Answer 1

In addition to the above answers, I came across one case where the problem was caused due to the configuration was mismatched to the google-services.json file:

It is also possible that the clientId was specifically assigned in the GoogleSignInOptions Builder as shown below:

    String serverClientId = "xxxxx-yyyy.apps.googleusercontent.com";
    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestEmail()
            .requestIdToken(serverClientId)
            .build();

If this is the case, it is possible to remove the reference to the serverClientId and the requestIdToken call as shown below:

    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestEmail()
            .build();

This would then rely on the google-services.json as opposed to the hard-coded value during configuration.

I hope it saves someone else the trouble that I had trying to diagnose the fault with my project.