Android 系统服务getSystemService

public Object getSystemService (String name)

Since: API Level 1

Return the handle to a system-level service by name. The class of the returned object varies by the requested name. Currently available names are:

WINDOW_SERVICE ("window")

The top-level window manager in which you can place custom windows. The returned object is a WindowManager.

LAYOUT_INFLATER_SERVICE ("layout_inflater")

A LayoutInflater for inflating layout resources in this context.

ACTIVITY_SERVICE ("activity")

A ActivityManager for interacting with the global activity state of the system.

POWER_SERVICE ("power")

A PowerManager for controlling power management.

ALARM_SERVICE ("alarm")

A AlarmManager for receiving intents at the time of your choosing.

NOTIFICATION_SERVICE ("notification")

A NotificationManager for informing the user of background events.

KEYGUARD_SERVICE ("keyguard")

A KeyguardManager for controlling keyguard.

LOCATION_SERVICE ("location")

A LocationManager for controlling location (e.g., GPS) updates.

SEARCH_SERVICE ("search")

A SearchManager for handling search.

VIBRATOR_SERVICE ("vibrator")

A Vibrator for interacting with the vibrator hardware.

CONNECTIVITY_SERVICE ("connection")

A ConnectivityManager for handling management of network connections.

WIFI_SERVICE ("wifi")

A WifiManager for management of Wi-Fi connectivity.

INPUT_METHOD_SERVICE ("input_method")

An InputMethodManager for management of input methods.

UI_MODE_SERVICE ("uimode")

An UiModeManager for controlling UI modes.

DOWNLOAD_SERVICE ("download")

A DownloadManager for requesting HTTP downloads