title: Android: how to expand and collapse cardView size in RecyclerView
body: <p>I need to expand and collapse <code>CardView</code> size in <code>RecyclerView</code> at run time.
  I use <code>RecyclerView</code> to display a list and <code>CardView</code> as <code>RecyclerView</code> Item.
  As I am new to this concept please help me.</p>