android中ListView控件&&onItemClick点击事件

listView= (ListView) this.findViewById(R.id.listview);
     List<HashMap<String,String>>data = new ArrayList<HashMap<String,String>>();
     UserService us = new UserService(this);
     List<User> users = us.getScrollDate(0, 10);
     for(User u : users){
      HashMap<String,String> map = new HashMap<String, String>();
      map.put("userid", String.valueOf(u.getUserid()));
      map.put("name", u.getName());
      map.put("age", String.valueOf(u.getAge()));
      data.add(map);
     }
     SimpleAdapter adapter = new SimpleAdapter(this,data,R.layout.useritem,new String[]{"userid","name","age"},new int[]{R.id.userid,R.id.name,R.id.age});

    listView.setAdapter(adapter);
     listView.setOnItemClickListener(new OnItemClickListener(){
@SuppressWarnings("unchecked")
@Override
public void onItemClick(AdapterView<?> parent, View view,
  int position, long id) {
 ListView listView = (ListView)parent;
 HashMap<String, String> map = (HashMap<String, String>) listView.getItemAtPosition(position);
 String userid = map.get("userid");
 String name = map.get("name");
 String age = map.get("age");
 Toast.makeText(SQLiteCRUDActivity.this, userid +" , "+ name +" , "+ age ,Toast.LENGTH_LONG).show();
}
     });