Native built-in applications refer to applications installed in the operating system and provided by the operating system developer. These applications are often pre-installed in the operating system when the device is shipped from the factory and cannot be easily removed or replaced. The functions of native built-in applications usually cover the basic functions and services of the device, such as phone calls, text messages, browsers, cameras, contacts, etc.
In the Android operating system, some common native built-in applications include Phone, Messaging, Browser, Camera, Calendar, Contacts, etc. These applications provide the basic functions that users need for daily use of the device and can directly access the system's underlying resources and services.
For vehicle-mounted devices, built-in applications are divided into two parts. One part is the built-in application that comes with the Android source code, and the other part is the application built by the car manufacturer.
1. Built-in applications
1. System-level applications
These applications and services are part of the Android system and are closely related to the system's core functions and framework. Usually provides system-level functions, such as telephony application (Telephony), multimedia framework (MediaProvider), system settings (Settings), etc.
Source code location
frameworks/base/packages
2. User-level applications
These applications are usually part of the Android operating system, but are not core components of the system. Usually includes user interface applications such as calendar, contacts, text messages, browser, camera, etc.
Source code location
/packages/apps/