How can I make NGUI buttons with Platoevolved’s In App Billing Plugin for Android? I am a noob when it comes to using NGUI.
It is easy. First you must learn NGUI
http://www.tasharen.com/?page_id=197
Next, learn about your plugin api
http://www.platoevolved.com/blog/unity-plugins/#!/~/product/category=2743024&id=13203885
Now, study a little of unity3d plugins
So far, so good. Now you it is good to create some prototypes with one of each tecnologies unitil you understand what is really happens.
And them, implement your final version with everything together.