如何在RelativeLayout中以编程方式设置android:orientation ="horizo​​ntal"？

如何在RelativeLayout中以编程方式设置android:orientation ="horizo​​ntal",如下所示:

这是我到目前为止:

RelativeLayout rLayout = new RelativeLayout(getActivity());
LayoutParams layoutParams;
layoutParams = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
rLayout.setLayoutParams(layoutParams);

gahfy.. 23

正如您在文档中看到的那样,没有任何orientation争论RelativeLayout.