Android - remove background from circular disclosure (Lollipop)

I am in the process of converting my application to a new content template and I noticed a slight annoyance. When I use the Reveal Effect , a white background is seen in front of it before it transitions between visible and invisible.

It currently looks like this when it animates

Start

Near

Done

XML

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <include layout="@layout/actionbar_visualizer" />

    <LinearLayout
        android:id="@+id/visualizerProductContainer"
        android:layout_width="280dp"
        android:layout_height="match_parent"
        android:layout_below="@id/visualizerActionBar"
        android:background="@color/black"
        android:gravity="left"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/gridHeader"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/fifty_transparent_black"
            android:gravity="center"
            android:padding="10dp"
            android:text="@string/products"
            android:textColor="@color/white" />

        <GridView
            android:id="@+id/productGrid"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:columnWidth="75dp"
            android:numColumns="auto_fit"
            android:paddingTop="10dp"
            android:stretchMode="columnWidth" />
    </LinearLayout>

    ...

</RelativeLayout>

      

        
        
        
      

    

Animation

...
mProductContainer = (LinearLayout)findViewById(R.id.visualizerProductContainer);
...

private void showHideProducts() {
    if (mProductContainer.getVisibility() == View.VISIBLE) {
        int cx = (mProductContainer.getLeft() + mProductContainer.getRight()) / 8;
        int cy = (mProductContainer.getTop() + mProductContainer.getBottom()) / 8;

        int initialRadius = mProductContainer.getWidth();

        Animator anim = ViewAnimationUtils.createCircularReveal(mProductContainer, cx, cy, initialRadius, 0);

        anim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                mProductContainer.setVisibility(View.GONE);
            }
        });

        anim.start();
    } else {
        int cx = (mProductContainer.getLeft() + mProductContainer.getRight()) / 8;
        int cy = (mProductContainer.getTop() + mProductContainer.getBottom()) / 8;

        int finalRadius = Math.max(mProductContainer.getWidth(), mProductContainer.getHeight());

        Animator anim = ViewAnimationUtils.createCircularReveal(mProductContainer, cx, cy, 0, finalRadius);

        mProductContainer.setVisibility(View.VISIBLE);
        anim.start();
    }
}

      

        
        
        
      

    

Does anyone know a way to remove the background / make it transparent between animations?