android facebook sdk - 设置openActiveSession的权限

我正在尝试将Facebook SDK集成到Android应用程序中.我从Facebook手册获得了代码.它使用Session.openActiveSession然后请求图形用户.如何在不使用LoginButton类的情况下请求更多权限？

Session.openActiveSession(this, true, new Session.StatusCallback() {
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);

        if (session.isOpened()) {
            Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
                @Override
                public void onCompleted(GraphUser user, Response response) {
                    if (user != null) {
                        // got user graph
                    } else {
                        // could not get user graph
                    }
                }
            });
        }
    }
});

谢谢.