Android 各API包功能介绍
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android.util
包含一些列底层辅助类,例如特定的容器类,XML辅助工具类等等(contains various low-level utilityclasses, such as specialized container classes, XML utilities, etc)
android.os
提供基本的操作服务,消息传递和进程进程间通讯IPC(provides basic operating system services, message passing, and inter-process communication)
android.graphics
作为核心渲染包(is the core rendering package)
android.text android.text.method android.text.style android.text.util
提供一套丰富的文本处理工具,支持富文本、输入模式等等(supply a rich set of text processing tools, supporting rich text, input methods, etc)
android.database
包含底层API处理数据库(contains low-level APIs for working with databases)
android.content
提供各种服务访问数据在设备上,程序安装到设备和其他的相关资源,以及内容提供展示动态数据。(provides variousservices for accessing data on the device: applications installed onthe device and their associated resources, and content providers forpersistent dynamic data.)
android.view
核心用户界面框架(is the core user-interface framework)
android.widget
提供标准用户界面元素,lists列表 buttons按钮,layoutmanagers布局管理器等等,构建从View包中(supplies standard user interface elements(lists, buttons, layout managers, etc) built from the view package)
android.app
提供高层应用程序模型,实现使用Activities(provides the high-level application model, implemented using Activities)
其他值得注意的包 (Other Notable Packages)
这些包提供附加指定域也行在Android平台,这些必须在基本的应用程序开发(These packages provideadditional domain-specific features of the Android platform. They arenot 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)
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