Google Sign-In requestIdToken returns null

Question

I forked this google sample project and ran the android signin.

I set up the options in the google developers console and got a client id, but when running the proje

Answer 1

As I have commented and as Google's documentation, you should use "Web application" type Client Id, instead of "Android" type Client Id.

As the following screenshot:

Answer 2

Use "default_web_client_id" in GoogleSignInOptions

 GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.default_web_client_id))
                .requestEmail()
                .build();

It works perfectly.

Answer 3

In my case was just the incompatible version of the libraries... :(