Activity tag or mark
<p>I've got about 10 activities. They can be divided into groups based on their layout header.
I also have a base activity, which is a ancestor to all other. In this base activity I'd like to enable different helpers regarding the specific child activity, e.g. initialize button handlers for specific header - group.</p>

<p>Is it possible to assign to Activity tag that'll group it with similar ?</p>

<p>I don't want to if instanceof in the base class.</p>

<p>Thank you.</p>
