ListView(信息显示列表) 与ArrayAdapter

lv = (ListView) findViewById(R.id.iv);
final List list = new ArrayList();
list.add("张三");
list.add("张三");
list.add("张三");
list.add("张三");
list.add("张三");
list.add("张三");
list.add("张三");
list.add("张三");
list.add("李四");
list.add("张三");
list.add("张三");
ArrayAdapter aa = new ArrayAdapter(this, android.R.layout.simple_list_item_1, list);
lv.setAdapter(aa);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getBaseContext(),list.get(position).toString() , Toast.LENGTH_SHORT).show();
}
});
}