java.lang.IllegalStateException: Can't start async operation (launchPurchaseFlow) because another async operation(refresh inventory) is in progress.
at com.smartmobilesoftware.util.IabHelper.flagStartAsync(IabHelper.java:821)
at com.smartmobilesoftware.util.IabHelper.launchPurchaseFlow(IabHelper.java:375)
at com.smartmobilesoftware.util.IabHelper.launchPurchaseFlow(IabHelper.java:340)
at jp.wizcorp.phonegap.plugin.wizPurchase.IAP.buy(IAP.java:348)
at jp.wizcorp.phonegap.plugin.wizPurchase.IAP.access$200(IAP.java:43)
at jp.wizcorp.phonegap.plugin.wizPurchase.IAP$3.run(IAP.java:326)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)