ViewPager2 + Fragment两边各展示一点点Fra

布局正常写，代码添加以下部分即可

private void setViewPagerEffect(int leftItemWidth, int rightItemWidth, int pageMargin) {
    CompositePageTransformer compositePageTransformer = new CompositePageTransformer();
    compositePageTransformer.addTransformer(new MarginPageTransformer(ViewUtil.dp2px(pageMargin)));
    binding.cardViewPager.setPageTransformer(compositePageTransformer);

    setRecyclerViewPadding(ViewUtil.dp2px(leftItemWidth + pageMargin), ViewUtil.dp2px(rightItemWidth + pageMargin));
}

private void setRecyclerViewPadding(int leftItemPadding, int rightItemPadding) {
    RecyclerView recyclerView = (RecyclerView) binding.cardViewPager.getChildAt(0);
    if (binding.cardViewPager.getOrientation() == ViewPager2.ORIENTATION_VERTICAL) {
        recyclerView.setPadding(0, leftItemPadding, 0, rightItemPadding);
    } else {
        recyclerView.setPadding(leftItemPadding, 0, rightItemPadding, 0);
    }
    recyclerView.setClipToPadding(false);
}