question: public void onUpdateFromPeekToExpand ( float percentage ) { if ( ! isVisible ( ) ) return ; mHeightPx = Math . round ( MathUtils . interpolate ( mDefaultHeightPx , 0.f , percentage ) ) ; mTextOpacity = MathUtils . interpolate ( 1.f , 0.f , percentage ) ; }
target:  Interpolates the UI from states Peeked to Expanded.