LeanbackShowcase/app/src/main/java/androidx/leanback/leanbackshowcase/cards/presenters/IconCardInChannelPublishPresenter.java [41:53]:
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    protected ImageCardView onCreateView() {
        final ImageCardView imageCardView = super.onCreateView();
        final ImageView image = imageCardView.getMainImageView();
        image.setBackgroundResource(R.drawable.icon_focused);
        image.getBackground().setAlpha(0);
        imageCardView.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                animateIconBackground(image.getBackground(), hasFocus);
            }
        });
        return imageCardView;
    }
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LeanbackShowcase/app/src/main/java/androidx/leanback/leanbackshowcase/cards/presenters/IconCardPresenter.java [38:50]:
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    protected ImageCardView onCreateView() {
        final ImageCardView imageCardView = super.onCreateView();
        final ImageView image = imageCardView.getMainImageView();
        image.setBackgroundResource(R.drawable.icon_focused);
        image.getBackground().setAlpha(0);
        imageCardView.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                animateIconBackground(image.getBackground(), hasFocus);
            }
        });
        return imageCardView;
    }
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