/** * set selectedData according to selected items in adapterData * * @return number of chosen items */ private String setSelectedData() { String chosenNum = ""; for (int i = 0; i < adapterData.size(); i++) { GoodsInformation singleData = adapterData.get(i); if (singleData.getSelected()) { String temp = i + " "; chosenNum += temp; selectedData.add(singleData); } } return chosenNum; }