Android : Dialog dismiss on AsyncTask timeout

I'm starting AsyncTask for a network connection and I decided a 10 seconds timeout after that the task should be canceled in case of network issues:

            final aTask record = new aTask();
            record.execute();
            Handler handler = new Handler();
            handler.postDelayed(new Runnable()
            {
              @Override
              public void run() {
                  if ( record.getStatus() == AsyncTask.Status.RUNNING ) {
                      record.cancel(true);
                  Toast.makeText(MainActivity.this, "Error in handling recording: connection timeout", Toast.LENGTH_SHORT).show();
                  }
              }
            }, 10000 );

I noticed that the Spinner dialog is always running after the async task is canceled. How can I dismiss that ?