Android-动态ListView数据的OnClick处理程序? [英] Android - OnClick handler for dynamic ListView data?

问题描述

我有一个ListView，每次创建Activity时，它都会填充一组动态数据.为了简单起见，可以说每个ListView项目都是员工的名字.在幕后，每个员工都有一个employee_id号.该数字在界面的任何位置都不可见.

I have a ListView that is filled with a dynamic set of data each time the Activity is created. For simplicity's sake, lets say each ListView item is a employee's name. Under the hood, each employee has an employee_id number. This number is not visible anywhere in the interface.

当我在ListView中单击某个员工的姓名时，我要启动另一个活动，将相应员工的employee_id传递给该活动.

When I click on an employee's name in the ListView, I want to launch another activity, passing the corresponding employee's employee_id to that Activity.

我了解如何为ListView实现onClick处理程序.我的问题是，我应该在哪里存储和检索每个员工的employee_id?我是否只需将其与员工显示在列表中的位置一起存储在哈希/映射中?当我单击时，我只是确定单击列表中的位置，然后使用该位置从哈希中获取employee_id?

I understand how to implement the onClick handler for the ListView. My question is, where would I store and retrieve the employee_id for each employee? Would I simply store it in a hash/map along with the position in the list that the employee shows up at? And when I click, I just determine the position in the list I clicked at, and then get the employee_id from the hash using that position?

推荐答案

将ArrayAdapter与雇员"列表一起使用-假设您有Employee-object.

Use the ArrayAdapter with a list Employees - assuming you have Employee-object.

public class MyActivity extends ListActivity {
   // list of employees
   private List<Employee> employees = new ArrayList<Employee>();

然后使用OnItemClick中的position参数获取员工对象.

Then use the position parameter in OnItemClick to get the employee-object.

 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    int employee_id = ((Employee) getListAdapter().getItem(position)).getId();
    // ...
 }

您还可以扩展ArrayAdapter来定制员工对象的列表: 如何使用ArrayAdapter< myClass>

You can also extend the ArrayAdapter to tailor the list for employee-objects: How to use ArrayAdapter<myClass>

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