Can I set android:layout_toLeftOf programmatically?

I have a RelativeLayout where I have one `TextView` and this element has its `android:layout_toLeftOf` attribute set to another TextView in this same layout. Depending on the data received by the app from the server, I need to set the visibility of this one TextView to `GONE` and set the visibility of a `ProgressBar` to `VISIBLE` and then I need the first TextView left align with this Progress bar. Is this possible to accomplish programmatically? If not, could you think of a way to tackle the issue? EDIT Following below advice, this is how my working code looks like: ``` TextProgressBar txtProgressBar = (TextProgressBar) v.findViewById(R.id.progressBarPointsInProgress); TextView offerName = (TextView) v.findViewById(R.id.textViewOfferName); android.widget.RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)offerName.getLayoutParams(); params.addRule(RelativeLayout.LEFT_OF, R.id.progressBarPointsInProgress); params.addRule(RelativeLayout.ALIGN_PARENT_LEFT); offerName.setLayoutParams(params); ```