In-App-Billing:CantsetupIABHelperexception我正在尝试在GooglePlay中使用静态产品ID设置应用内结算和测试。我在这里关注开发者教程。当在labHelper对象上调用launhPurcahseFlow方法时,出现异常:java.lang.IllegalStateException:IABhelperisnotsetup.Can'tperformoperation:launchPurchaseFlowatcom.android.vending.billing.IabHelper.checkSetupDone(IabHelper.java:782)已经