学步园

Intent intent = ....;//intent定义
ArrayList<User> list = .....;//list赋值
intent.putExtra("userList", list.toArray());
startActivity(intent);
//前提是list中的User必须implements Serializable 

//接收时：
Intent intent = this.getIntent();   
        Object[] cobjs = (Object[]) intent.getSerializableExtra("userList");   
        for (int i = 0; i < cobjs.length; i++) {   
            User user = (User) cobjs[i];   
            userList.add(user);   
        }