Android Dev Summit, October 23-24: two days of technical content, directly from the Android team. Sign-up for livestream updates.


interface PageTransformer

A PageTransformer is invoked whenever a visible/attached page is scrolled. This offers an opportunity for the application to apply a custom transformation to the page views using animation properties.

As property animation is only supported as of Android 3.0 and forward, setting a PageTransformer on a ViewPager on earlier platform versions will be ignored.


Public methods

abstract Unit
transformPage(@NonNull page: View, position: Float)

Apply a property transformation to the given page.

Public methods


abstract fun transformPage(@NonNull page: View, position: Float): Unit

Apply a property transformation to the given page.

page View: Apply the transformation to this page
position View: Position of page relative to the current front-and-center position of the pager. 0 is front and center. 1 is one full page position to the right, and -1 is one page position to the left.