ContactCell The Contact Cell fits inside ListView or RecyclerView
ContactCell.LayoutParams Layout information for child views of an ContactCell. 
ContactCell.Measurement Wraps measurement information so that they can be returned in a method  
ProfileHeader The profile header helps the user recognize and learn more about a person. 
ProfileHeader.LayoutParams Layout information for child views of an ProfileHeader

Child view added in XML could optionally have a layout_profile_group parameter to tell the parent ProfileHeader how to layout this child view. 


ContactCell.ContactAction With setContactActions(ContactAction), shows specified actions for contact cell.