Android新手入门-Android中文SDK

指定域也行在Android平台，这些必须在基本的应用程序开发(These packages provide additional domain-specific features of the Android platform. They are not necessary for basic application development.)

android.provider

包含定义变量标准内容提供包含在平台中(contains definitions for various standard content providers included with the platform)

android.telephony

提供API交互和设备的通话栈(provides APIs for interacting with the device's phone stack.)

android.webikit

包含一系列API工作在基于web的内容(includes various APIs for working with web-based content)