Google Play促销代码-每个促销代码一次使用或多次兑换 [英]Google Play Promo Codes - one time use or multiple redemptions per promo code
在我的应用程序运行时收听 PURCHASES_UPDATED 以获取兑换促销代码 [英]Listen for PURCHASES_UPDATED for redeem promo codes while my app is running
Google Play:如果用户已经订阅,可以申请促销代码延迟下一个付款日期吗? [英]Google Play: if a user already has a subscription, can promo-code applying to delay the next payment date?