The following is a brief introduction to the main Java packages in the API in the Android SDK:
Copy Code code as follows:
Android.app: Provides a high-level program model and provides a basic operating environment
Android.content: Classes that contain various access to and publication of data on the device
Android.database: Browsing and manipulating databases through content providers
Android.graphics: The bottom of the graphics library, including canvas, color filtering, dots, rectangles, you can draw them directly to the screen.
Android.location: Classes for locating and related services
Android.media: Provides a number of classes to manage a variety of audio, video media interface
Android.net: Provides classes that help network access over the usual java.net.* interfaces
Android.os: Provides system service, message transmission, IPC mechanism
Android.opengl: A tool to provide OpenGL
Android.provider: Provides class access to Android content providers
Android.telephony: Provides API interaction associated with dialing calls
Android.view: Provides a basic interface framework for user interfaces
Android.util: A tool-related approach, such as a time and date operation
Android.webkit: Default Browser operator interface
Android.widget: Contains a variety of UI elements (mostly visible) used in the application's screen
