harmony 鸿蒙@ohos.batteryStatistics (Battery Statistics)

2022-12-22
浏览 (603)

@ohos.batteryStatistics (Battery Statistics)

The batteryStatistics module provides APIs for querying software and hardware power consumption statistics.

NOTE

The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.

The APIs provided by this module are system APIs.

Modules to Import

import batteryStats from '@ohos.batteryStatistics';

batteryStats.getBatteryStats

getBatteryStats(): Promise

Obtains the power consumption information list. This API uses a promise to return the result.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Return value

Type	Description
Promise>	Promise used to return the power consumption information list.

Error codes

For details about the error codes, see Thermal Manager Error Codes.

Code	Error Message
4600101	If connecting to the service failed.

Example

batteryStats.getBatteryStats()
.then((data: batteryStats.BatteryStatsInfo[]) => {
    console.info('battery statistics info: ' + data);
})
.catch((err: Error) => {
    console.error('get battery statistics failed, err: ' + err);
});

batteryStats.getBatteryStats

getBatteryStats(callback: AsyncCallback): void

Obtains the power consumption information list. This API uses an asynchronous callback to return the result.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback>	Yes	Callback used to return the result. If the operation is successful, err is undefined and data is the array of power consumption information obtained (that is, Array<BatteryStatsInfo>>). If the operation failed, err is an error object.

Error codes

For details about the error codes, see Thermal Manager Error Codes.

Code	Error Message
4600101	If connecting to the service failed.

Example

batteryStats.getBatteryStats((err: Error, data : batteryStats.BatteryStatsInfo[]) => {
    if (typeof err === 'undefined') {
        console.info('battery statistics info: ' + data);
    } else {
        console.error('get battery statistics failed, err: ' + err);
    }
});

batteryStats.getAppPowerValue

getAppPowerValue(uid: number): number

Obtains the power consumption of an application.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Parameters

Name	Type	Mandatory	Description
uid	number	Yes	Application UID.

Return value

Type	Description
number	Power consumption of the application with this UID, in unit of mAh.

Error codes

For details about the error codes, see Thermal Manager Error Codes.

Code	Error Message
4600101	If connecting to the service failed.

Example

try {
    let value = batteryStats.getAppPowerValue(10021);
    console.info('battery statistics value of app is: ' + value);
} catch(err) {
    console.error('get battery statistics value of app failed, err: ' + err);
}

batteryStats.getAppPowerPercent

getAppPowerPercent(uid: number): number

Obtains the proportion of the power consumption of an application.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Parameters

Name	Type	Mandatory	Description
uid	number	Yes	Application UID.

Return value

Type	Description
number	Proportion of the power consumption of an application with this UID.

Error codes

For details about the error codes, see Thermal Manager Error Codes.

Code	Error Message
4600101	If connecting to the service failed.

Example

try {
    let percent = batteryStats.getAppPowerPercent(10021);
    console.info('battery statistics percent of app is: ' + percent);
} catch(err) {
    console.error('get battery statistics percent of app failed, err: ' + err);
}

batteryStats.getHardwareUnitPowerValue

getHardwareUnitPowerValue(type: ConsumptionType): number

Obtains the power consumption of a hardware unit according to the consumption type.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Parameters

Name	Type	Mandatory	Description
type	ConsumptionType	Yes	Power consumption type.

Return value

Type	Description
number	Power consumption of the hardware unit corresponding to the power consumption type, in unit of mAh.

Error codes

For details about the error codes, see Thermal Manager Error Codes.

Code	Error Message
4600101	If connecting to the service failed.

Example

try {
    let value = batteryStats.getHardwareUnitPowerValue(batteryStats.ConsumptionType.CONSUMPTION_TYPE_SCREEN);
    console.info('battery statistics value of hardware is: ' + value);
} catch(err) {
    console.error('get battery statistics percent of hardware failed, err: ' + err);
}

batteryStats.getHardwareUnitPowerPercent

getHardwareUnitPowerPercent(type: ConsumptionType): number

Obtains the proportion of the power consumption of a hardware unit according to the power consumption type.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Parameters

Name	Type	Mandatory	Description
type	ConsumptionType	Yes	Power consumption type.

Return value

Type	Description
number	Proportion of the power consumption of the hardware unit corresponding to the power consumption type.

Error codes

For details about the error codes, see Thermal Manager Error Codes.

Code	Error Message
4600101	If connecting to the service failed.

Example

try {
    let percent = batteryStats.getHardwareUnitPowerPercent(batteryStats.ConsumptionType.CONSUMPTION_TYPE_SCREEN);
    console.info('battery statistics percent of hardware is: ' + percent);
} catch(err) {
    console.error('get battery statistics percent of hardware failed, err: ' + err);
}

BatteryStatsInfo

Describes the device power consumption information.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Attributes

Name	Type	Readable	Writable	Description
uid	number	Yes	No	UID related to power consumption information.
type	ConsumptionType	Yes	No	Power consumption type.
power	number	Yes	No	Power consumption, in unit of mAh.

ConsumptionType

Enumerates power consumption types.

System API: This is a system API.

System capability: SystemCapability.PowerManager.BatteryStatistics

Name	Value	Description
CONSUMPTION_TYPE_INVALID	-17	Unknown type.
CONSUMPTION_TYPE_APP	-16	Power consumption of an application.
CONSUMPTION_TYPE_BLUETOOTH	-15	Power consumption of Bluetooth.
CONSUMPTION_TYPE_IDLE	-14	Power consumption when the CPU is idle.
CONSUMPTION_TYPE_PHONE	-13	Power consumption of a phone call.
CONSUMPTION_TYPE_RADIO	-12	Power consumption of wireless communication.
CONSUMPTION_TYPE_SCREEN	-11	Power consumption of the screen.
CONSUMPTION_TYPE_USER	-10	Power consumption of the user.
CONSUMPTION_TYPE_WIFI	-9	Power consumption of Wi-Fi.