网络 适配器视图
The AdapterView object is an implementation of ViewGroup that determines its child views based on a given Adapter object.
AdapterView对象是一个用给定的Adapter对象为基础构建它的子视图的ViewGroup实现。
The Adapter ACTS like a Courier between your data source (perhaps an array of external strings) and the AdapterView, which displays it.
而Adapter在你的数据源(可能是一个外部字符串数组)和显示这些数据的AdapterView之间扮演着一个信使的角色。