Android Animation using AndroidX Transition API.

AndroidAnimation.kt

/*  usage fabMessages.toggle(Slide(Gravity.Bottom)) : Slide() & Fade() */
fun View.toggle(transition: Transition) {
    transition.duration = 500
    transition.addTarget(this)
    TransitionManager.beginDelayedTransition(this.parent as ViewGroup, transition)
    visibility = if (!isVisible) View.VISIBLE else View.GONE
}

// Usage extend any of your view with toggle, like (Button, FabButton, etc).
// use views Id.

// There are Two types of Transhions. (Fade(), Slide())

// Gravity is where do you want it to slide from.
fabMessages.toggle(Slide(Gravity.Bottom))