an class="normal">()</span>
    </h4>
      <div class="api-level">
        <div>
  Added in <a href="../../../guide/topics/manifest/uses-sdk-element.html#ApiLevels">API level 1</a></div>
        
  

      </div>
    <div class="jd-details-descr">
      
  <div class="jd-tagdata jd-tagdescr"><p>Returns an estimated number of bytes that can be read or skipped without blocking for more
 input.

 <p>Note that this method provides such a weak guarantee that it is not very useful in
 practice.

 <p>Firstly, the