java - 检索 List 中 Map 的值

Question

ArrayList<HashMap<String, Object>> list = ArrayList<HashMap<String, Object>>()

我有一个包含 HashMap 的数组列表，我能够获取 List 的位置，现在我如何获取 List 中对象的键 和 值。

@Override
public View getDropDownView() {        
    System.out.println(data.get(position)); // i am getting my List Objects 
}

//下面是data.get(position)的输出

 {"title":"hello"}, => 0 
 {"title":"hello1"}, => 1
 {"title":"hello2"}, => 2
 {"title":"hello3"}, => 3

Answer 1

试试这个:

List<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();

    for (Map element : list) {
        Set<Map.Entry<String, Object>> entrySet = element.entrySet();
        for (Map.Entry<String, Object> mapEntry : entrySet) {
            System.out.println("Key is : " + mapEntry.getKey());
            System.out.println("Value is : " + mapEntry.getValue());
        }
    }