Defining custom attrs

Question

I need to implement my own attributes like in com.android.R.attr

Found nothing in official documentation so I need information about how to define these

Answer 1

Qberticus's answer is good, but one useful detail is missing. If you are implementing these in a library replace:

xmlns:whatever="http://schemas.android.com/apk/res/org.example.mypackage"

with:

xmlns:whatever="http://schemas.android.com/apk/res-auto"

Otherwise the application that uses the library will have runtime errors.