ServiceManager
SystemServiceManager
-mContext：Context-mServices：ArrayList
+startService( ):SystemService+startBootPhase(final int phase)+startUser(int userHandle)+switchUser(int userHandle)+stopUser(int userHandle)+cleanupUser(int userHandle)
SystemServer
-mSystemContext:Context-mSystemServiceManager:SystemServiceManager-mContentResolver:ContentResolver-mActivityManagerService:ActivityManagerService-mDisplayManagerService:DisplayManagerService......
+main()+SystemServer()-run()-createSystemContext()-startBootstrapServices()-startCoreServices()-startOtherServices()
ContextImpl
+getSystemService(String name):Object+createSystemContext(ActivityThread mainThread):ContextImpl......
PowerManagerService
PowerManager()onStart()onBootPhase()......
abstract class SystemService
+SystemService(Context context)+getContext():Context+onStart()+onBootPhase(int phase)......
IPackageManager
+ installPackage()+ checkPermission()+ getInstalledPackages()+ finishPackageInstall()......
WifiService
onStart()onBootPhase(int phase)
PackageManagerService
......
ActivityThread
+getSystemContext():ContextImpl.....
abstract class Context
