GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters();
oauthParameters.setOAuthConsumerKey( Credentials.CONSUMER_KEY );
oauthParameters.setOAuthConsumerSecret( Credentials.CONSUMER_SECRET );
oauthParameters.setOAuthToken( Credentials.oauthToken );
oauthParameters.setOAuthTokenSecret( Credentials.oauthSecret );
GoogleService googleService = new GoogleService( "userinfo", "myApp" );
googleService.setOAuthCredentials( oauthParameters, new OAuthHmacSha1Signer() );
Feed emailResults = googleService.getFeed( serviceURL, Feed.class );
System.out.println( "Count: " + emailResults.getItemsPerPage() );