java - 如何在ListView中存储ID并在android java中显示类似data的数据

Question

我正在android上的listview上工作，每个项目都有自己的id，我不想将它显示给用户例如

List<String> carModelList = new ArrayList<>();
carModelList.add("car1");
carModelList.add("car2");
 adapter = new CustomView(this, (ArrayList<String>) carModelList);
 mListview.setAdapter(adapter);

现在我知道输出将是

car1
car2

但是我需要的是

List<String> carModelList = new ArrayList<>();
carModelList.add("hidden unique id","car1");//like <option value="hidden unique id">car1</option>
carModelList.add("hidden unique id","car2");
 adapter = new CustomView(this, (ArrayList<String>) carModelList);
 mListview.setAdapter(adapter);

输出应该是这样的

car1
car2

//when i set the OnItemClickListener
mListview.setOnItemClickListener((parent, view, position, id) -> {

     mListview.getItemAtPosition(position).toString()// should give car1 or car2
     mListview.getHiddenUniqueIdAtPosition(position).toString()//should give hidden unique id

}

Answer 1

您应该使用模型(POJO)来处理这个问题。检查以下内容:

class ListItem {
    String id;
    String name;

    public ListItem(String id, String name) {
        this.id = id;
        this.name = name;
    }
}

更改适配器的构造函数以处理此数据类型

public CustomView(Context context, ArrayList<ListItem> carModelList) {
}

然后将此列表传递给适配器并在 getView 中仅显示名称

List<ListItem> carModelList = new ArrayList<>();
carModelList.add(new ListItem("hidden unique id","car1"));
carModelList.add(new ListItem("hidden unique id","car2"));
adapter = new CustomView(this, (ArrayList<ListItem>) carModelList);
mListview.setAdapter(adapter);

从 OnItemClickListener 获取 Id，如下所示:

mListview.setOnItemClickListener((parent, view, position, id) -> {
     ListItem listItem = mListview.getItemAtPosition(position);
     String id = listItem.id; // this is hidden id
}