title: Multiple activities in 1 Activity?
body: <p>This question may seem dumb but I there is this thing that has been bothering.
  I am kinda new in android development and I am trying to make android app with ringtone feature.
  My app will contain roughly 20 sounds. My idea to create app: Press Long Click>Show new layout with buttons. I was thinking to create 20 XML layouts, 1 for each Song file in my app, and 20 activities, 1 for each layout.
  Now Is there something like subclass or some replacement for Activity. 
  Some other way to avoid using 1 activity per layout.
  Something that can have on create set layout and everything like Activity and to be started via intent. To put those 20 ringtone activities all in 1?</p>