java - NullPointerException InAppBilling.IabHelper.launchPurchaseFlow(IabHelper.java :356)

Question

我在我的项目中实现了应用内结算，但有时它会给出以下 NullPointerException IabHelper.launchPurchaseFlow() 方法。目前我正在使用保留 ID 进行测试并且 apk 未签名。

02-01 01:53:56.097: E/AndroidRuntime(9314): java.lang.NullPointerException
02-01 01:53:56.097: E/AndroidRuntime(9314):     at com.example.app.InAppBilling.IabHelper.launchPurchaseFlow(IabHelper.java:356)
02-01 01:53:56.097: E/AndroidRuntime(9314):     at com.example.app.InAppBilling.IabHelper.launchPurchaseFlow(IabHelper.java:307)
02-01 01:53:56.097: E/AndroidRuntime(9314):     at com.example.app.MYTabActivity$4.onClick(MYTabActivity.java:418)
02-01 01:53:56.097: E/AndroidRuntime(9314):     at com.android.internal.app.AlertController$ButtonHandler.handleMessage
.

..

Answer 1

这可能对您有帮助:http://code.google.com/p/android/issues/detail?id=41407

// in IapHelper.java line 357
if (listener != null)
   listener.onIabPurchaseFinished(result, null);
flagEndAsync(); // Added
return; // Added