Common Android system services

You can use the getSystemService method of the Activity class to obtain the specified system service.

The getSystemService method has only one String parameter, indicating the system service ID. This ID is unique throughout the Android system.

Android SDK defines these IDs in the android. content. Context class. As follows:

Constants
AccessibilityManager	ACCESSIBILITY_SERVICE	Use the registered event listener to send UI events to users. It mainly involves the distribution and management of click, focus, text changes, and other events in View, debugging and problem locating of the entire system, etc. This service also needs to be carefully checked.
AccountManager	ACCOUNT_SERVICE	Receive Intents at the time you select
ActivityManager	ACTIVITY_SERVICE	Activity Service
AlarmManager	ALARM_SERVICE	Alarm service
AppOpsManager	APP_OPS_SERVICE	Use with getSystemService (String) to retrieve a AppOpsManager for tracking application operations on the device. Application in device operation tracking
AudioManager	AUDIO_SERVICE	Audio Service. Manage volume, bell mode, and audio Routing
Descrithadapter	BLUETOOTH_SERVICE	Bluetooth service
CaptioningManager	CAPTIONING_SERVICE	Use with getSystemService (String) to retrieve a CaptioningManager for obtaining captioning properties and listening for changes in captioning preferences.
ClipboardManager	CLIPBOARD_SERVICE	Clipboard Service
ConnectivityManager	CONNECTIVITY_SERVICE	Network Connection Service. It can be queried by other applications. When the network status changes, it can also be broadcast and changed.
ConsumerIrManager	CONSUMER_IR_SERVICE	Infrared signal service. Device for transmitting infrared signals
DevicePolicyManager	DEVICE_POLICY_SERVICE	Device listening service
DisplayManager	DISPLAY_SERVICE	Use with getSystemService (String) to retrieve a DisplayManager for interacting with display devices. Obtain DisplayManager to interact with the display device.
DownloadManager	DOWNLOAD_SERVICE	Download service. HTTP download request
DropBoxManager	DROPBOX_SERVICE	Obtain the DropBoxManager instance to record diagnostic logs.
InputMethodManager	INPUT_METHOD_SERVICE	The Management Service Program of the input method, including when to enable the input method, and switching the input method.
InputManager	INPUT_SERVICE	Obtain InputManager to interact with the input device.
Icationicationmanager	KEYGUARD_SERVICE	Obtain icationicationmanager to control the keyboard lock
LayoutInflater	LAYOUT_INFLATER_SERVICE	Use with getSystemService (String) to retrieve a LayoutInflater for inflating layout resources in this context.
LocationManager	LOCATION_SERVICE	GPS Positioning Service
MediaRouter	MEDIA_ROUTER_SERVICE	Use with getSystemService (String) to retrieve a MediaRouter for controlling and managing routing of media.
NfcManager	NFC_SERVICE	Use with getSystemService (String) to retrieve a NfcManager for using NFC. NFC
Icationicationmanager	NOTIFICATION_SERVICE	Responsible for managing and notifying the occurrence of background events. This is glued together with statusbar, and the response icon is usually added to statusbar. You can use this to know what happened in the system background.
NsdManager	NSD_SERVICE	Use with getSystemService (String) to retrieve a NsdManager for handling management of network service discovery
PowerManager	POWER_SERVICE	Power Supply Service
PrintManager	PRINT_SERVICE	Print Service. Print and manage printer and print tasks
SearchManager	SEARCH_SERVICE	Search Service
SensorManager	SENSOR_SERVICE	Sensor Service
StorageManager	STORAGE_SERVICE	System Storage Service
TelephonyManager	TELEPHONY_SERVICE	Telephone Service
TextServicesManager	TEXT_SERVICES_MANAGER_SERVICE	Use with getSystemService (String) to retrieve a TextServicesManager for accessing text services.
UiModeManager	UI_MODE_SERVICE	Use with getSystemService (String) to retrieve a UiModeManager for controlling UI modes.
USB Manager	USB_SERVICE	Use with getSystemService (String) to retrieve a USB Manager for access to USB devices (as a USB host) and for controlling this device's behavior as a USB device.
UserManager	USER_SERVICE	User Management Service. Manage Users on multi-user devices
Vibrator	VIBRATOR_SERVICE	Vibrator Service
Com. android. server. WallpaperService	WALLPAPER_SERVICE	Wallpaper Service
WifiP2pManager	WIFI_P2P_SERVICE	WIFI-P2P Connection Service
WifiManager	WIFI_SERVICE	WIFI Service
WindowManager	WINDOW_SERVICE	System window service