question: @ TargetApi ( Build . VERSION_CODES . HONEYCOMB ) protected void swipeView ( View child , float deltaX , float deltaY ) { if ( isFixedView ( child ) ) { deltaX = deltaX / 4 ; } float deltaXAbs = Math . abs ( deltaX ) ; float fractionCovered = deltaXAbs / ( float ) child . getWidth ( ) ; child . setTranslationX ( deltaX ) ; child . setAlpha ( 1.f - fractionCovered ) ; if ( deltaX > 0 ) child . setRotationY ( - 15.f * fractionCovered ) ; else child . setRotationY ( 15.f * fractionCovered ) ; }
target:  Swipe a view by moving distance