如何从FacebookLogin抓取图片

private class SessionStatusCallback implements Session.StatusCallback { private String fbAccessToken;

@Override
public void call(Session session, SessionState state, Exception exception) {
    updateView();
    if (session.isOpened()) {
        fbAccessToken = session.getAccessToken();
        // make request to get facebook user info
        Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
            @Override
            public void onCompleted(GraphUser user, Response response) {
                Log.i("fb", "fb user: "+ user.toString());

                String fbId = user.getId();
                String fbAccessToken = fbAccessToken;
                String fbName = user.getName();
                String gender = user.asMap().get("gender").toString();
                String email = user.asMap().get("email").toString();

                Log.i("fb", userProfile.getEmail());
            }
        });
    }
}

}