title: AlertDialog's setCancelable(false) method not working
body: <p>I had created an AlertDialog which is working fine. It is disappearing, if I press:<br> 
  1) escape keyboard button or <br>
  2) back button using mouse <br>
  To make it stay focused even on above stated conditions, I had added '.setCancelable(false)' statement while building. But, I still see dialog disappearing. Where is the problem? 
  Please help.<br></p>
  
  <p>Code added:<br></p>
  
  <pre><code>return new AlertDialog.Builder(getActivity())
                  .setIcon(R.drawable.alert_dialog_icon)
                  .setTitle(title)
                  .setCancelable(false)
                  .setPositiveButton(R.string.alert_dialog_ok,
                      new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog, int whichButton) {
                              ((FragmentAlertDialog)getActivity()).doPositiveClick();
                          }
                      }
                  )
                  .setNegativeButton(R.string.alert_dialog_cancel,
                      new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog, int whichButton) {
                              ((FragmentAlertDialog)getActivity()).doNegativeClick();
                          }
                      }
                  )
                  .create();
  </code></pre>
  
  <p><br>
  Env: Android 4.0 on XP Professional.</p>