ViewPager seems to reenable clipChildren when scrolling if PageTransformer is set

Question

I have a ViewPager with both clipToPadding and clipChildren set to false. The items in the pager have a drop shadow effect that is drawn below each item, outside of its bounds. This works just fine when the pager is static:

However, when animating between pages the children are clipped just as if clipChildren has been set:

The behaviour only occurs when the PageTransformer is set.

Answer 1

After digging around for quite a while i found the following post here on Stack overflow: Do not clip ViewPager pages. While similar, i did not suffer from the NoSaveStateFrameLayout issue the poster had. However in the comment to the accepted answer I found the following tidbit:

"[...] I had a PageTransformer on my ViewPager, but you couldn't know. I set the layer on my transformed View to NONE, and it worked."

So I tried doing the following in my PageTransformer:

public void transformPage(View view, float v) {

    view.setLayerType(View.LAYER_TYPE_NONE, null);
}

This finally solved the problem. It should be noted that setting this when creating the element did not solve the problem.