harmony 鸿蒙Common Events of the Power Management Subsystem

2023-10-30
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Common Events of the Power Management Subsystem

This document lists the common system events provided by the power management subsystem to applications. Applications can use APIs to subscribe to common system events.

COMMON_EVENT_BATTERY_CHANGED

Indicates that the charging state, level, and other information about the battery have changed.

Value: usual.event.BATTERY_CHANGED
Required subscriber permissions: none

When any of the following information changes, the event notification service is triggered to publish this event: battery level, battery voltage, battery temperature, battery health status, type of the charger connected to the device, maximum current of the charger, maximum voltage of the charger, battery charging status, number of charging times, total battery capacity, remaining battery capacity, battery model, current of the battery, and battery charging type.

COMMON_EVENT_BATTERY_LOW

Indicates that the battery level is low.

Value: usual.event.BATTERY_LOW
Required subscriber permissions: none

When the battery level drops to lower than the low battery level set for the device, the event notification service is triggered to publish this event. For details about how to set the low battery level, see Battery Level Customization.

COMMON_EVENT_BATTERY_OKAY

Indicates that the battery level is normal.

Value: usual.event.BATTERY_OKAY
Required subscriber permissions: none

When the battery level changes from the low level to normal level, the event notification service is triggered to publish this event.

COMMON_EVENT_POWER_CONNECTED

Indicates that the device is connected to an external power supply.

Value: usual.event.POWER_CONNECTED
Required subscriber permissions: none

When the device connects to an external charger, the event notification service is triggered to publish this event.

COMMON_EVENT_POWER_DISCONNECTED

Indicates that the device is disconnected from the external power supply.

Value: usual.event.POWER_DISCONNECTED
Required subscriber permissions: none

When the device is disconnected from the external power supply, the event notification service is triggered to publish this event.

COMMON_EVENT_DISCHARGING

Indicates that the system stops charging the battery.

Value: usual.event.DISCHARGING
Required subscriber permissions: none

When the system stops charging the battery, the event notification service is triggered to publish this event.

COMMON_EVENT_CHARGING

Indicates that the system starts charging the battery.

Value: usual.event.CHARGING
Required subscriber permissions: none

When the system starts charging the battery, the event notification service is triggered to publish this event.

COMMON_EVENT_CHARGE_TYPE_CHANGED

Indicates that the system charging type has changed. This event is available only for system applications. - Value: usual.event.CHARGE_TYPE_CHANGED

Required subscriber permissions: none

When the system charging type changes, the event notification service is triggered to publish this event.

COMMON_EVENT_CHARGE_IDLE_MODE_CHANGED

Indicates that the device enters the charging idle mode.

Value: usual.event.CHARGE_IDLE_MODE_CHANGED
Required subscriber permissions: none

When the device starts charging in idle mode, and the temperature rise is acceptable, the event notification service is triggered to publish this event.

COMMON_EVENT_SHUTDOWN

Indicates that the device is being and will be shut down.

Value: usual.event.SHUTDOWN
Required subscriber permissions: none

When the device is being shut down until it is powered off, the event notification service is triggered to publish this event.

COMMON_EVENT_SCREEN_OFF

Indicates that the device screen is off and the device is in sleep mode.

Value: usual.event.SCREEN_OFF
Required subscriber permissions: none

When the device screen is turned off and the device is in sleep mode, the event notification service is triggered to publish this event.

COMMON_EVENT_SCREEN_ON

Indicates that the device screen is on and the device is in the active state.

Value: usual.event.SCREEN_ON
Required subscriber permissions: none

When the device screen is turned on and in the active state, the event notification service is triggered to publish this event.

COMMON_EVENT_POWER_SAVE_MODE_CHANGED

Indicates that the system power saving mode has changed.

Value: usual.event.POWER_SAVE_MODE_CHANGED
Required subscriber permissions: none

When the system power saving mode changes, the event notification service is triggered to publish this event.

COMMON_EVENT_THERMAL_LEVEL_CHANGED

Indicates that the device’s thermal level has changed.

Value: usual.event.THERMAL_LEVEL_CHANGED
Required subscriber permissions: none

When the device’s thermal level changes, the event notification service is triggered to publish this event. For details about how to configure the thermal level, see Thermal Level Customization.