怎么通过listview的item点击监听更新activity的其他控件

list = (ListView) findViewById(R.id.TaskList);
        list.setOnItemClickListener(new OnItemClickListener()
        {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3)
            {
             ViewHolder holder = (ViewHolder) arg1.getTag();
            }
        });弱弱的问一下，你说的是这个么，通过ViewHolder调用ListView的其他控件