google 内购 mHelper.launchPurchaseFlow(this, SKU_GAS, RC_REQUEST, mPurchaseFinishedListener);
这几个参数都填啥呀
mHelper.launchPurchaseFlow(this, SKU_GAS, RC_REQUEST, mPurchaseFinishedListener); SKU_GAS是商品id，在google play后台配置的；RC_REQUEST是网络请求方式；mPurchaseFinishedListener是购买结果回调的