PMS: Package Manager Service

Overview

src: /framework/base/services/core/java/.../pm/
PMS is responsible for managing various kinds of information related to the application packages that are currently installed on the device
PMS#getApplicationInfo(packageName): get the information of a package
PMS#getInstalledApplications(userId): get all installed application information of a user
PMS#getInstalledPackages(userId): get all installed package information of a user

PMS is created started as a bootstrap service in system server
PMS runs in its own thread namely PackageManager
PMS manages all package informations via a packageName to Package map PMS.mPackage: ArrayMap<String, PackageParser.Package> (see #28)
On creating (PMS#<init>())
- it registers itself to service manager via ServiceManager.addService(this)
- it creates a ServiceThread extends HandlerThread named PackageManager to handle messages
- it scans the device directory to parse all packages and update mPackage
- vendor overlay packages
- base frameworks
- system packages
- ...
- installed apps (/data/app/, see #36)
:warning: TO BE ADDED: More internals about other methods