title: how to sort vector of items in android while targeting api level 15?
body: <p>I am trying to sort vector of items using comparator in android.
  I tried:</p>
  
  <pre><code>vector.sort(new myComparator());
  </code></pre>
  
  <p>but it shows error:</p>
  
  <pre><code>Call requires API level 24 (current min is 15): java.util.Vector#sort
  </code></pre>
  
  <p>Any solution to it??</p>