【领券联盟】笔记：视频28-编写分类详情的数据绑定

课前准备

• 给 HomePagerFragment 和 RecyclerView 的 item 都添加上背景色
• 给 RecyclerView 设置间距

    mContentList.addItemDecoration(new RecyclerView.ItemDecoration() {
            @Override
            public void getItemOffsets(@NonNull Rect outRect, @NonNull View view,
                @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
                super.getItemOffsets(outRect, view, parent, state);
                outRect.top = 8;
                outRect.bottom = 8;
            }
        });

课堂笔记

• 把数据设置到 item 中

    public class InnerHolder extends RecyclerView.ViewHolder {
        @BindView(R.id.goods_cover)
        public ImageView cover;
        @BindView(R.id.goods_title)
        public TextView title;
        @BindView(R.id.tv_off_prise)
        public TextView offPrice;
        @BindView(R.id.after_off_prise)
        public TextView afterOffPrice;
        @BindView(R.id.original_prise)
        public TextView originalPrice;
        @BindView(R.id.goods_sell_count)
        public TextView sellCount;
        public InnerHolder(@NonNull View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
        public void setData(HomePagerContent.DataBean dataBean) {
            Context context = itemView.getContext();
            //商品图片，创建方法UrlUtils.getCoverPath，给url加"https"前缀
            Glide.with(context).load(UrlUtils.getCoverPath(dataBean.getPict_url())).into(cover);
            //商品标题
            title.setText(dataBean.getTitle());
            //优惠券金额
            int couponAmount = dataBean.getCoupon_amount();
            offPrice.setText(String.format(context.getString(R.string.text_goods_off_price), couponAmount));
            //商品原价
            String zkFinalPrice = dataBean.getZk_final_price();
            originalPrice.setText(String.format(context.getString(R.string.text_goods_original_price), zkFinalPrice));
            //设置中划线
            originalPrice.setPaintFlags(Paint.STRIKE_THRU_TEXT_FLAG);
            //商品券后价（原价-优惠券金额）
            float zkAfterOffPrice = Float.valueOf(zkFinalPrice) - couponAmount;
            //券后价金额保留两位小数
            afterOffPrice.setText(String.format("%.2f", zkAfterOffPrice));
            //商品销量
            sellCount.setText(String.format(context.getString(R.string.text_goods_sell_count),dataBean.getVolume()));
        }

• 在 String 资源中创建的一些字符模板

    <string name="text_goods_off_price">省%1$d元</string>
    <string name="text_goods_original_price">￥%1$s</string>
    <string name="text_goods_sell_count">%1$d人已经购买</string>

• 观看视频