fix SHQCLIENT-1763 订单详情页优惠券金额显示错误

Components/BUserOrder/src/main/res/layout/border_view_order_commodity_info.xml

@@ -131,7 +131,7 @@
             android:id="@+id/tv_coupon_amount"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text='@{"- " + @string/amount(data.discountFee)}'
+            android:text='@{data.couponList.size() > 0 ? "- ¥" + data.couponList.get(0).amount : "- ¥0.00"}'
             android:textColor="@color/color_FB4653"
             android:textSize="@dimen/sp14"
             android:visibility="@{data.couponList.size() > 0 ? View.VISIBLE : View.GONE}"