GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) .requestIdToken(getString(R.string.server_client_id)) .requestEmail() .build();
GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(transport, jsonFactory) // Here is where the audience is set -- checking that it really is your server // based on your Server’s Client ID .setAudience(Arrays.asList(ENTER_YOUR_SERVER_CLIENT_ID_HERE)) // Here is where we verify that Google issued the token .setIssuer("https://accounts.google.com").build(); GoogleIdToken idToken = verifier.verify(idTokenString); if (idToken != null) { Payload payload = idToken.getPayload(); String userId = payload.getSubject(); // You can also access the following properties of the payload in order // for other attributes of the user. Note that these fields are only // available if the user has granted the 'profile' and 'email' OAuth // scopes when requested. Even when requested, some fields may be null. // String email = payload.getEmail(); // boolean emailVerified = Boolean.valueOf(payload.getEmailVerified()); // String name = (String) payload.get("name"); // String pictureUrl = (String) payload.get("picture"); // String locale = (String) payload.get("locale"); // String familyName = (String) payload.get("family_name"); // String givenName = (String) payload.get("given_name");
