what is ids.xml used for?

Question

Just a quick question, what is the ids.xml used for when developing an Android app? I saw an example on the android resources webpage which contained:

Answer 1

When creating views dynamically, predefining id's in ids.xml gives the posibility to reference a newly created view. After you use the setId(id) method you can access the view as if it had been defined in XML. This blog post has a nice example.