title: Execute Code only after async task complete
body: <p>I have the following three lines of code.</p>
  
  <pre><code>Line 1 : GetBitMapFromURL gbmap = new GetBitMapFromURL();   //Obtain thumbnail bitmap
  Line 2 : gbmap.execute(applicationThumbNailURL);
  Line 3 : applicationThumbnailBitMap = gbmap.returnBitmap();
  </code></pre>
  
  <p>I want Line 3 to be executed only after GetBitMapFromURL  async task's onPostExecute is executed.</p>