LeanbackShowcase/app/src/main/java/androidx/leanback/leanbackshowcase/cards/presenters/IconCardInChannelPublishPresenter.java [55:61]:
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    private void animateIconBackground(Drawable drawable, boolean hasFocus) {
        if (hasFocus) {
            ObjectAnimator.ofInt(drawable, "alpha", 0, 255).setDuration(ANIMATION_DURATION).start();
        } else {
            ObjectAnimator.ofInt(drawable, "alpha", 255, 0).setDuration(ANIMATION_DURATION).start();
        }
    }
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LeanbackShowcase/app/src/main/java/androidx/leanback/leanbackshowcase/cards/presenters/IconCardPresenter.java [52:58]:
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    private void animateIconBackground(Drawable drawable, boolean hasFocus) {
        if (hasFocus) {
            ObjectAnimator.ofInt(drawable, "alpha", 0, 255).setDuration(ANIMATION_DURATION).start();
        } else {
            ObjectAnimator.ofInt(drawable, "alpha", 255, 0).setDuration(ANIMATION_DURATION).start();
        }
    }
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