我很抱歉在这个方式来回答，但是从谷歌文档pretty关于这个问题的好; http://developer.android.com/guide/market/billing/index.html

I am sorry to answer in this manner, but the documentation from Google is pretty good on the subject; http://developer.android.com/guide/market/billing/index.html

在魔域的例子提供样品code是pretty不错。

The "Dungeons" example provides sample code that is pretty good.

在应用程序内结算是​​一个有点复杂，并且采用一些先进的Andr​​oid技术，如IPC。我一直在尝试这最后的两三天，我认为你必须做像我一样;关闭办公室的门，并深入到样品code＆放;文档。

In app billing is a bit complex, and uses some advanced Android techniques like IPC. I have been experimenting with this for the last two-three days, and I think you will have to do like me; close the office door and dig into the sample code & docs.

好运！请向沿途的任何具体问题。我相信人们会愿意帮助更多的。

good luck! Please ask any specific question along the way. I am sure people will be more than willing to help.