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")@Overridepublic 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();}     });