Can I Set "android:layout_below" at Runtime Programmatically?

Question

Is it possible when creating a RelativeLayout at runtime to set the equivalent of android:layout_below programmatically?

user_2914140 · Answer

While @jackofallcode answer is correct, it can be written in one line:

((RelativeLayout.LayoutParams) viewToLayout.getLayoutParams()).addRule(RelativeLayout.BELOW, R.id.below_id);

user_2256407 · Answer

Kotlin version with infix function

infix fun View.below(view: View) {
      (this.layoutParams as? RelativeLayout.LayoutParams)?.addRule(RelativeLayout.BELOW, view.id)
}

Then you can write:

view1 below view2

Or you can call it as a normal function:

view1.below(view2)