These are basic packages. They are the foundation for compiling applications through the Android SDK. Here we will list and describe them from the bottom to the top.
* Android. util contains some underlying auxiliary classes, such as specific container classes and XML auxiliary tool classes.
* Android. OS provides basic operation services for message passing and inter-process communication (IPC.
* Android. graphics is used as the graphic rendering package and provides the graphic rendering function.
* Android. text android. text. method android. text. style android. text. util provides a rich set of text processing tasks, including Rich text and input modes.
* Android. database contains underlying APIs to process databases, allowing you to conveniently operate database tables and data.
* Android. content provides various services to access data on mobile devices. The program is installed on mobile devices and other related resources. The content also displays dynamic data.
* Android. view core user interface framework.
* Android. widgets provide standard user interface elements, such as List, Buttons, and Layout manager, which constitute the basic elements of our interface.
* Android. app provides a high-level application model to implement Activity.
* Android. provider provides a convenient way to call the content providers interface provided by the system.
* Android. telephony provides APIs and call interfaces for mobile devices.
* Android. webikit contains a series of Web-based APIs.
These are basic packages. They are the foundation for compiling applications through the Android SDK. Here we will list and describe them from the bottom to the top.
* Android. util contains some underlying auxiliary classes, such as specific container classes and XML auxiliary tool classes.
* Android. OS provides basic operation services for message passing and inter-process communication (IPC.
* Android. graphics is used as the graphic rendering package and provides the graphic rendering function.
* Android. text android. text. method android. text. style android. text. util provides a rich set of text processing tasks, including Rich text and input modes.
* Android. database contains underlying APIs to process databases, allowing you to conveniently operate database tables and data.
* Android. content provides various services to access data on mobile devices. The program is installed on mobile devices and other related resources. The content also displays dynamic data.
* Android. view core user interface framework.
* Android. widgets provide standard user interface elements, such as List, Buttons, and Layout manager, which constitute the basic elements of our interface.
* Android. app provides a high-level application model to implement Activity.
* Android. provider provides a convenient way to call the content providers interface provided by the system.
* Android. telephony provides APIs and call interfaces for mobile devices.
* Android. webikit contains a series of Web-based APIs.
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