我有一个ArrayList< Integer>值(20,40,60,80,100,120)是否可以仅检索位置2-5,即60,100和120?谢谢你的帮助.
for (DataSnapshot price : priceSnapshot.getChildren()) { int pr = price.getValue(Integer.class); priceList.add(pr); // size is 61 } int total = 0; List<Integer> totalList = new ArrayList<Integer>(priceList.subList(29,34)); for (int i = 0; i < totalList.size(); i++) { int to = totalList.get(i); total += to; txtPrice.setText(String.valueOf(total)); }