Android and other library common packages

Android is a Linux platform-based open-source mobile operating system platform launched by Google.

In the Android class library, the various packages are written in android.*, and the description of the important packages is as follows:

[1]android.app: provide high-level program model, provide basic operating environment;

[2]android.content: Contains a variety of classes for accessing and publishing data on a device;

[3]android.database: Browsing and manipulating databases through content providers;

[4]android.graphics: The underlying graphics library that contains the canvas, color filters, dots, rectangles, can draw them directly onto the screen;

[5]android.location: Class of positioning and related services;

[6]android.media: Provide some classes to manage a variety of audio, video media interface;

[7]android.net: A class that provides help for network access, exceeding the usual java.net.* interface;

[8]android.os: provides system services, message transmission, IPC mechanism;

[9]ANDROID.OPENGL: Provides OpenGL tools, 3D acceleration;

[10]android.provider: Provides class access to Android content providers;

[11]android.telephony: Provides API interaction related to making calls;

[12]android.view: provides a basic interface framework for the user interface;

[13]android.util: A tool-related approach, such as a time-date operation;

[14]android.webkit: Default browser Operation interface;

[15]android.widget: contains a variety of UI elements (mostly visible) that are used in the application's screen;

Android and other library common packages