Android : how to pass parameters to facebook post dialogbox in android

I am using below code for passing the params for facebook dailog but it not work. pls anybody help.

    Bundle params = new Bundle();
    params.putString("message", "test message");
    params.putString("description", "test test test");

    facebook.dialog(this, "feed", params, new DialogListener(){

        @Override
        public void onFacebookError(FacebookError e) {
        }

        @Override
        public void onError(DialogError e) {
        }

        @Override
        public void onComplete(Bundle values) {
        }

        @Override
        public void onCancel() {
        }
    });