Android Circular Reveal Animation For Recyclerview Item Not Working

Question

I want to circular reveal animation for recycler view items. I put the following code in the adapter class but it doesn't work. please help me.

public void anim(final CustomViewHolder customViewHolder) {
    // get the center for the clipping circle
    int centerX = (customViewHolder.imageView.getLeft() + customViewHolder.imageView.getRight()) / 2;
    int centerY = (customViewHolder.imageView.getTop() + customViewHolder.imageView.getBottom()) / 2;

    int startRadius = 0;
    // get the final radius for the clipping circle
    int endRadius = Math.max(customViewHolder.imageView.getWidth(), customViewHolder.imageView.getHeight());

    // create the animator for this view (the start radius is zero)
    Animator anim =
            null;
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
        anim = ViewAnimationUtils.createCircularReveal(customViewHolder.rv,
                centerX, centerY, startRadius, endRadius);

        anim.setDuration(1000);
        // make the view invisible when the animation is done
        anim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
            }
        });

        customViewHolder.rv.setVisibility(View.VISIBLE);
        anim.start();
    }
}