安卓将多个单项插入ArrayList<HashMap<String，来自HashMap<String的String>>，String>

ArrayList<HashMap<String, HashMap<String, String>>> arrayList = new ArrayList<>();

HashMap<String, HashMap<String, String>> item1 = new HashMap<>();
item1.put("key1", new HashMap<String, String>());
item1.get("key1").put("subKey1", "value1");
item1.get("key1").put("subKey2", "value2");
arrayList.add(item1);

HashMap<String, HashMap<String, String>> item2 = new HashMap<>();
item2.put("key2", new HashMap<String, String>());
item2.get("key2").put("subKey1", "value3");
item2.get("key2").put("subKey2", "value4");
arrayList.add(item2);