android - ArrayList 中的 ArrayList

Question

ArrayList<ArrayList<String>> mainlist = new ArrayList<ArrayList<String>>();
ArrayList<String> childlist = new ArrayList<String>();

for (int i = 0; i < 3 i++){
   String chlidtext = chlidlist + String.valueof(i);
   String maintext = mainlist +String.Valueof(i);
   childlist.add(chlidtext);
   mainlist.add(maintext);
}

 return mainlist;

我不知道如何在每个 chlidlist 中获取第三个元素？

Answer 1

您可以通过以下方式访问 childList 的第三个元素：

mainList.get(index).get(2); // Here 1st get() will get the 1st element of mainList which conatins 1st child element and 2nd get() will get the 3rd element of childlist.