harmony 鸿蒙@ohos.bluetooth.a2dp (Bluetooth A2DP Module)

2023-10-30
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@ohos.bluetooth.a2dp (Bluetooth A2DP Module)

The a2dp module provides APIs for using the Bluetooth Advanced Audio Distribution Profile (A2DP), which defines how to stream high quality audio from one device to another over a Bluetooth connection.

NOTE

The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import a2dp from '@ohos.bluetooth.a2dp';

a2dp.createA2dpSrcProfile

createA2dpSrcProfile(): A2dpSourceProfile

Creates an A2dpSrcProfile instance.

System capability: SystemCapability.Communication.Bluetooth.Core

Return value

Type	Description
A2dpSourceProfile	A2dpSrcProfile instance created.

Example

import { BusinessError } from '@ohos.base';
try {
    let a2dpProfile = a2dp.createA2dpSrcProfile();
    console.info('a2dp success');
} catch (err) {
    console.error('errCode: ' + (err as BusinessError).code + ', errMessage: ' + (err as BusinessError).message);
}

A2dpSourceProfile

Provides APIs for using the A2DP. Before using any API of A2dpSourceProfile, you need to create an instance of this class by using createA2dpSrcProfile().

connect

connect(deviceId: string): void

Connects to an A2DP device.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_BLUETOOTH

System capability: SystemCapability.Communication.Bluetooth.Core

Parameters

Name	Type	Mandatory	Description
deviceId	string	Yes	Address of the device to connect.

Error codes

For details about the error codes, see Bluetooth Error Codes.

ID	Error Message
2900001	Service stopped.
2900003	Bluetooth switch is off.
2900004	Profile is not supported.
2900099	Operation failed.

Example

import { BusinessError } from '@ohos.base';
try {
    let a2dpSrc = a2dp.createA2dpSrcProfile();
    a2dpSrc.connect('XX:XX:XX:XX:XX:XX');
} catch (err) {
    console.error('errCode: ' + (err as BusinessError).code + ', errMessage: ' + (err as BusinessError).message);
}

disconnect

disconnect(deviceId: string): void

Disconnects from an A2DP device.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_BLUETOOTH

System capability: SystemCapability.Communication.Bluetooth.Core

Parameters

Name	Type	Mandatory	Description
deviceId	string	Yes	Address of the device to disconnect.

Error codes

For details about the error codes, see Bluetooth Error Codes.

ID	Error Message
2900001	Service stopped.
2900003	Bluetooth switch is off.
2900004	Profile is not supported.
2900099	Operation failed.

Example

import { BusinessError } from '@ohos.base';
try {
    let a2dpSrc = a2dp.createA2dpSrcProfile();
    a2dpSrc.disconnect('XX:XX:XX:XX:XX:XX');
} catch (err) {
    console.error('errCode: ' + (err as BusinessError).code + ', errMessage: ' + (err as BusinessError).message);
}

getPlayingState

getPlayingState(deviceId: string): PlayingState

Obtains the playing state of a device.

Required permissions: ohos.permission.ACCESS_BLUETOOTH

System capability: SystemCapability.Communication.Bluetooth.Core

Parameters

Name	Type	Mandatory	Description
device	string	Yes	Address of the remote device.

Return value

Type	Description
PlayingState	Playing state of the remote device obtained.

Error codes

For details about the error codes, see Bluetooth Error Codes.

ID	Error Message
2900001	Service stopped.
2900003	Bluetooth switch is off.
2900004	Profile is not supported.
2900099	Operation failed.

Example

import { BusinessError } from '@ohos.base';
try {
    let a2dpSrc = a2dp.createA2dpSrcProfile();
    let state = a2dpSrc.getPlayingState('XX:XX:XX:XX:XX:XX');
} catch (err) {
    console.error('errCode: ' + (err as BusinessError).code + ', errMessage: ' + (err as BusinessError).message);
}