Android system provides the development of common package name and function

Android.app: Provides a high-level program model and provides a basic operating environment

Android.content: Contains a variety of classes for accessing and publishing data on a device

Android.database: Browsing and manipulating databases through content providers

Android.graphics: The underlying graphics library, which contains the canvas, color filters, dots, rectangles, can draw them directly onto the screen.

Android.location: Classes for targeting and related services

Android.media: Provides some classes to manage multiple audio and video media interfaces

Android.net: A class that provides help for network access, more than the usual java.net.* interface

Android.os: Provides system services, message transmission, IPC mechanisms

ANDROID.OPENGL: Tools to provide OpenGL

Android.provider: Provides class access to Android content providers

Android.telephony: Providing API interaction with call-related calls

Android.view: Provides a basic interface framework for the user interface

Android.util: Methods involving tools, such as the operation of a time-date

Android.webkit: Default Browser operator interface

Android.widget: Contains various UI elements (mostly visible) used in the application's screen

Android system provides the development of common package name and function