When going from Page 2 back to Page 1, I created a custom button with custom slide left/right animation between Page 1 and Page 2. Then obviously the "UP" button uses a default animation to go from Page 2 back to Page 1.
I'm referring to the following "UP" button on bottom of Android phones. That triangle "UP" button.
Do all Android apps have the default animation for the "UP" button when going back to page 1? Or can I customize it to have the same animation as my custom button? Or is it even pointless to have a custom back button when Android provides the "UP" button? Is the "UP" button just always default animation, no point of making a custom one?