code: public void setTokenizer(MultiAutoCompleteTextView.Tokenizer t) {
          if(mAutoCompleteMode != AUTOCOMPLETE_MODE_MULTI)
              return;
          ((MultiAutoCompleteTextView)mInputView).setTokenizer(t);
      }
docs: Sets the Tokenizer that will be used to determine the relevant
  range of the text where the user is typing.
  <p>Only work when autoCompleMode is AUTOCOMPLETE_MODE_MULTI</p>