- parent
- The ViewGroup in which the View is being made visible.
- child
- The View being made visible.
- oldVisibility
- The previous visibility value of the child View, either Android.Views.View.GONE or Android.Views.View.INVISIBLE.
This method is called by ViewGroup when a child view is about to be made visible in the container. This callback starts the process of a transition; we grab the starting values, listen for changes to all of the children of the container, and start appropriate animations.