Not back on main thread when query.runAsync completes

[macs.d...@gmail.com]

Hi i am using couchbase mobile 1.1 on android and i am getting an CalledFromWrongThreadException when i try to update the ui within query.runAsync's completed callback. I assumed that when a async task completes that i am back on the main threat.
It seems runAsync works differently, however, i am not able to find much in the docs about it. advice would be very much appreciated (better stick to good old AsyncTask here?)

        query.runAsync(new QueryCompleteListener() {
              @Override
              public void completed(QueryEnumerator result, Throwable error) {
                  if (error != null) {
                      ui.update(result); //throws exception
                }
              }
        });