Google login get access token with new GoogleSignInOptions

Question

My android app currently uses the GoogleAuthUtil to signin users and fetch an access_token which is passed to the backend (code snippets below which show creating t

Answer 1

So i was having the same problem. they have changed it now so the token comes through in

GoogleSignInAccount acct = result.getSignInAccount();
Log.d(TAG, "handleSignInResult2: "+acct.getIdToken());

To get access too this token you have too ask for it in

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

The R.string.server_client_ID is the client ID from the project that you make in your Google developer Console.

I hope this helps you.

here is also the documentation i followed. https://developers.google.com/identity/sign-in/android/backend-auth

Answer 2

After signing in you'll be able to get the token:

final String token = GoogleAuthUtil.getToken(mAppContext, mAccountName, AUTH_TOKEN_TYPE);

dont forget to do it an Asynctask. for more detail have a look at here

EDIT:

Note that, despite the method name:

GoogleAuthUtil.getToken()

it does not give you an OAuth Token, it rather returns a "short-lived authorization code" according to the documentation.

What I should do after getting the Authorization Code by calling the GoogleAuthUtil.getToken() ?

You should transmit the Authorization Code to your backend server over HTTPS. Only from your server you should attempt to receive Access and/or Refresh token, not in your app.