code: public SimpleDialog multiChoiceItems(CharSequence[] items, int... selectedIndexes){
          if(mListView == null)
              initListView();
  
          mMode = MODE_MULTI_ITEMS;
          mAdapter.setItems(items, selectedIndexes);
          super.contentView(mListView);
          return this;
      }
docs: Set the list of items in multi-choice mode.
  @param items The list of items.
  @param selectedIndexes The indexes of selected items.
  @return The SimpleDialog for chaining methods.