title: add data to list view in android without clear old data
body: <p>add data to list view in android without clear old data</p>
  
  <p>I use this code:
  ListView listRecommended = (ListView) findViewById(R.id.ListViewAppsFree);
              listRecommended.setAdapter(new AppsListAdapter(CategoryActivity.this,names,icons,ratings,prices));</p>
  
  <p>I want to add new data without refresh old data or clear old data in <code>listveiw</code>?</p>
  
  <p>how to do it?</p>
  
  <p>replace <code>setadapter</code> with what?</p>
  
  <p>example :
  list view data:
  a
  b
  c</p>
  
  <p>add new data in last view</p>
  
  <p>a old data
  b old data
  c old data
  d new data</p>
  
  <p>plz show in example code</p>