Solution for dynamic elevation using RV/ScrollView state. #elevation

view_auto_elevation.txt

  <View
        android:id="@+id/view"
        android:background="@color/colorAccent"
        android:stateListAnimator="@animator/toolbar_elevator"/>

<-- res/animator/toolbar_elevator.xml -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true">
        <objectAnimator
            android:duration="350"
            android:propertyName="elevation"
            android:valueTo="8dp"
            android:valueType="floatType" />
    </item>

    <item>
        <objectAnimator
            android:duration="350"
            android:propertyName="elevation"
            android:valueTo="0dp"
            android:valueType="floatType" />
    </item>
</selector>

 scrollview.setOnScrollChangeListener { view.isSelected = scrollview.canScrollVertically(-1)}