android pms
时间: 2023-10-30 18:57:24 浏览: 48
Android PMS (Package Manager Service) is a system service in the Android operating system that is responsible for managing the installation, upgrade, and removal of applications on an Android device. It also manages the permissions that are granted to each application, ensuring that each app only has access to the resources and data that it is authorized to use.
The Package Manager Service maintains a database of all installed applications on the device, including their version numbers, signatures, and permissions. When an application is installed or updated, the PMS checks its package name, version code, and signature against the existing database to ensure that it is a valid and authorized package.
The PMS also manages the granting and revocation of permissions for each application. When an app requests a permission, the PMS checks whether the permission is granted or denied, and if it is not granted, it prompts the user to grant or deny the request.
Overall, the Android PMS plays a crucial role in maintaining the security and stability of the Android operating system and ensuring that each application behaves as expected.