title: What is the best way for Merging same items in a listView?
body: <p>I have a <code>lisView</code> with some items that may have a similar property, I want:</p>
  
  <p><strong>first</strong>, found these items that have similar property.</p>
  
  <p><strong>second</strong>, Merge these into one row item of list view,</p>
  
  <p>and</p>
  
  <p><strong>finally</strong>, when item selected ,show their items ( that are merged ) in a layout that expands.</p>
  
  <p>my idea is not so strong, I want to use <code>for</code> loop to found similar items, then store them in an <code>array</code> and finally in <code>adapter</code> check that if item is a merged <code>type</code> then use <code>Expandable Layout</code>.</p>
  
  <p><strong><em>Is any better solution?</em></strong></p>