What is the ButtonBarLayout and how should we use it?

Question

When I developed, I found a new widget called android.support.v7.widget.ButtonBarLayout unexpectedly. I tried to search it on the internet, but nothing was found, e

Answer 1

Just to add to the other answers, if you guys want to check the orientation of a ButtonBarLayout you should check the orienation AFTER the value has called on measure.

In other words (Kotlin):

buttonBarLayout.post {
    val orientation = buttonBarLayout.orientation
    val height = buttonBarLayout.measuredHeight
}