js-apis-batteryStatistics.md

# @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

```js
import batteryStats from '@ohos.batteryStatistics';
```

## batteryStats.getBatteryStats

getBatteryStats(): Promise<Array&lt;BatteryStatsInfo&gt;>

Obtains the power consumption information list, using a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.PowerManager.BatteryStatistics

**Return value**

| Type                                                 | Description                           |
| ----------------------------------------------------- | ------------------------------- |
| Promise<Array<[BatteryStatsInfo](#batterystatsinfo)>> | Promise used to return the power consumption information list.|

**Error codes**

For details about the error codes, see [Thermal Manager Error Codes](../errorcodes/errorcode-batteryStatistics.md).

| Code| Error Message      |
| -------- | -------------- |
| 4600101  | Operation failed. Cannot connect to service.|

**Example**

```js
batteryStats.getBatteryStats()
.then(data => {
    console.info('battery statistics info: ' + data);
})
.catch(err => {
    console.error('get battery statisitics failed, err: ' + err);
});
```

## batteryStats.getBatteryStats

getBatteryStats(callback: AsyncCallback<Array&lt;BatteryStatsInfo&gt;>): 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<Array<[BatteryStatsInfo](#batterystatsinfo)>> | 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. If the operation failed, **err** is an error object.|

**Error codes**

For details about the error codes, see [Thermal Manager Error Codes](../errorcodes/errorcode-batteryStatistics.md).

| Code| Error Message      |
| -------- | -------------- |
| 4600101  | Operation failed. Cannot connect to service.|

**Example**

```js
batteryStats.getBatteryStats((err, data) => {
    if (typeof err === 'undefined') {
        console.info('battery statistics info: ' + data);
    } else {
        console.error('get battery statisitics 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](../errorcodes/errorcode-batteryStatistics.md).

| Code| Error Message      |
| -------- | -------------- |
| 4600101  | Operation failed. Cannot connect to service.|

**Example**

```js
try {
    var value = batteryStats.getAppPowerValue(10021);
    console.info('battery statistics value of app is: ' + value);
} catch(err) {
    console.error('get battery statisitics 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](../errorcodes/errorcode-batteryStatistics.md).

| Code| Error Message      |
| -------- | -------------- |
| 4600101  | Operation failed. Cannot connect to service.|

**Example**

```js
try {
    var percent = batteryStats.getAppPowerPercent(10021);
    console.info('battery statistics percent of app is: ' + percent);
} catch(err) {
    console.error('get battery statisitics 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](#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](../errorcodes/errorcode-batteryStatistics.md).

| Code| Error Message      |
| -------- | -------------- |
| 4600101  | Operation failed. Cannot connect to service.|

**Example**

```js
try {
    var value = batteryStats.getHardwareUnitPowerValue(ConsumptionType.CONSUMPTION_TYPE_SCREEN);
    console.info('battery statistics percent of hardware is: ' + percent);
} catch(err) {
    console.error('get battery statisitics 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](#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](../errorcodes/errorcode-batteryStatistics.md).

| Code| Error Message      |
| -------- | -------------- |
| 4600101  | Operation failed. Cannot connect to service.|

**Example**

```js
try {
    var value = batteryStats.getHardwareUnitPowerPercent(ConsumptionType.CONSUMPTION_TYPE_SCREEN);
    console.info('battery statistics percent of hardware is: ' + percent);
} catch(err) {
    console.error('get battery statisitics 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](#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.   |