Android Google Play Store IAP V3 Consuming Product (扣點未取得道具問題) (驗單)

Sample Code :

https://code.google.com/p/marketbilling/source/browse/?r=ba61fb3aaad43650b1f0e73d6057d5374ff43518

說明
http://developer.android.com/training/in-app-billing/preparing-iab-app.html

參考資料：

http://developer.android.com/google/play/billing/billing_integrate.html

Querying for Purchased Items 和

Consuming a Purchase 部份 

Securing Your Application 部分 (驗單)

https://developers.google.com/android-publisher/api-ref/purchases/products    (驗token)
http://developer.android.com/google/play/billing/billing_reference.html
http://robertomurray.co.uk/blog/2013/server-side-google-play-in-app-billing-receipt-validation-and-testing/