GetSystemService for Android

GetSystemService is an important API for Android. It is a method of Activity. It retrieves the corresponding Object based on the input NAME and converts it to the corresponding service Object. The following describes the system services.

Input Name	Returned object	Description
WINDOW_SERVICE	WindowManager	Manage open window programs
LAYOUT_INFLATER_SERVICE	LayoutInflater	Get the view defined in xml
ACTIVITY_SERVICE	ActivityManager	Manage the system status of an application
POWER_SERVICE	PowerManger	Power Supply Service
ALARM_SERVICE	AlarmManager	Alarm service
NOTIFICATION_SERVICE	Icationicationmanager	Status Bar Service
KEYGUARD_SERVICE	KeyguardManager	Key lock Service
LOCATION_SERVICE	LocationManager	Location services, such as GPS
SEARCH_SERVICE	SearchManager	Search Service
VEBRATOR_SERVICE	Vebrator	Mobile phone vibration Service
CONNECTIVITY_SERVICE	Connectivity	Network Connection Service
WIFI_SERVICE	WifiManager	Wi-Fi Service
TELEPHONY_SERVICE	TeleponyManager	Telephone Service