Thanks...

Your best bet is to study a bit the Image Targets sample code, and try to understand it.

Also, I recommend to consult our developer guide, which covers a wide variety of topics, from "creating image targets" to integrating Vuforia:

https://developer.vuforia.com/resources/dev-guide/create-targets

https://developer.vuforia.com/resources/dev-guide/integrate-vuforia

In addition, a good set of articles about various common topics can be found here:

https://developer.vuforia.com/resources/dev-guide/knowledge-base-articles

I hope this helps you get you started.

ahhh....what a pity..but thanks for link you gave me,
so how can i understand and start to build an application, i don't even know application structure..

Hi, we don't have such tutorial, but you can look at this article, which may help:

https://developer.vuforia.com/forum/faq/android-how-do-i-replace-dataset-image-targets-sample