BluetoothHearingAid

Kotlin |Java

class BluetoothHearingAid : BluetoothProfile

kotlin.Any
↳	android.bluetooth.BluetoothHearingAid

This class provides the public APIs to control the Hearing Aid profile.

BluetoothHearingAid is a proxy object for controlling the Bluetooth Hearing Aid Service via IPC. Use BluetoothAdapter#getProfileProxy to get the BluetoothHearingAid proxy object.

Android only supports one set of connected Bluetooth Hearing Aid device at a time. Each method is protected with its appropriate permission.

Summary

Constants
static String	`ACTION_CONNECTION_STATE_CHANGED` Intent used to broadcast the change in connection state of the Hearing Aid profile.

Inherited constants

From class BluetoothProfile

`Int`	`A2DP` A2DP profile.
`Int`	`CSIP_SET_COORDINATOR` Coordinated Set Identification Profile set coordinator
`String`	`EXTRA_PREVIOUS_STATE` Extra for the connection state intents of the individual profiles. This extra represents the previous connection state of the profile of the Bluetooth device.
`String`	`EXTRA_STATE` Extra for the connection state intents of the individual profiles. This extra represents the current connection state of the profile of the Bluetooth device.
`Int`	`GATT` GATT
`Int`	`GATT_SERVER` GATT_SERVER
`Int`	`HAP_CLIENT`
`Int`	`HEADSET` Headset and Handsfree profile
`Int`	`HEALTH` Health Profile
`Int`	`HEARING_AID` Hearing Aid Device
`Int`	`HID_DEVICE` HID Device
`Int`	`LE_AUDIO` LE Audio Device
`Int`	`SAP`
`Int`	`STATE_CONNECTED` The profile is in connected state
`Int`	`STATE_CONNECTING` The profile is in connecting state
`Int`	`STATE_DISCONNECTED` The profile is in disconnected state
`Int`	`STATE_DISCONNECTING` The profile is in disconnecting state

Public methods
MutableList<BluetoothDevice!>	`getConnectedDevices()` Get connected devices for this specific profile.
Int	`getConnectionState(device: BluetoothDevice)` Get the current connection state of the profile For apps targeting `Build.VERSION_CODES#S` or or higher, this requires the `Manifest.permission#BLUETOOTH_CONNECT` permission which can be gained with `android.app.Activity#requestPermissions(String[], int)`.
MutableList<BluetoothDevice!>	`getDevicesMatchingConnectionStates(states: IntArray)` Get a list of devices that match any of the given connection states.

Constants

ACTION_CONNECTION_STATE_CHANGED

Added in API level 29

static val ACTION_CONNECTION_STATE_CHANGED: String

Intent used to broadcast the change in connection state of the Hearing Aid profile. Please note that in the binaural case, there will be two different LE devices for the left and right side and each device will have their own connection state changes.S

This intent will have 3 extras:

EXTRA_STATE - The current state of the profile.
EXTRA_PREVIOUS_STATE- The previous state of the profile.
BluetoothDevice#EXTRA_DEVICE - The remote device.

EXTRA_STATE or EXTRA_PREVIOUS_STATE can be any of STATE_DISCONNECTED, STATE_CONNECTING, STATE_CONNECTED, STATE_DISCONNECTING.
For apps targeting Build.VERSION_CODES#R or lower, this requires the Manifest.permission#BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES#S or or higher, this requires the Manifest.permission#BLUETOOTH_CONNECT permission which can be gained with android.app.Activity#requestPermissions(String[], int).
Requires android.Manifest.permission#BLUETOOTH_CONNECT

Value: "android.bluetooth.hearingaid.profile.action.CONNECTION_STATE_CHANGED"

Public methods

getConnectedDevices

Added in API level 29

fun getConnectedDevices(): MutableList<BluetoothDevice!>

Get connected devices for this specific profile.

Return the set of devices which are in state STATE_CONNECTED
For apps targeting Build.VERSION_CODES#S or or higher, this requires the Manifest.permission#BLUETOOTH_CONNECT permission which can be gained with android.app.Activity#requestPermissions(String[], int).
Requires android.Manifest.permission#BLUETOOTH_CONNECT

Return
`MutableList<BluetoothDevice!>`	This value cannot be `null`.

getConnectionState

Added in API level 29

fun getConnectionState(device: BluetoothDevice): Int

Get the current connection state of the profile
For apps targeting Build.VERSION_CODES#S or or higher, this requires the Manifest.permission#BLUETOOTH_CONNECT permission which can be gained with android.app.Activity#requestPermissions(String[], int).
Requires android.Manifest.permission#BLUETOOTH_CONNECT

Parameters
`device`	BluetoothDevice: This value cannot be `null`.

Return
`Int`	Value is `android.bluetooth.BluetoothProfile#STATE_DISCONNECTED`, `android.bluetooth.BluetoothProfile#STATE_CONNECTING`, `android.bluetooth.BluetoothProfile#STATE_CONNECTED`, or `android.bluetooth.BluetoothProfile#STATE_DISCONNECTING`

getDevicesMatchingConnectionStates

Added in API level 29

fun getDevicesMatchingConnectionStates(states: IntArray): MutableList<BluetoothDevice!>

Get a list of devices that match any of the given connection states.

If none of the devices match any of the given states, an empty list will be returned.
For apps targeting Build.VERSION_CODES#S or or higher, this requires the Manifest.permission#BLUETOOTH_CONNECT permission which can be gained with android.app.Activity#requestPermissions(String[], int).
Requires android.Manifest.permission#BLUETOOTH_CONNECT

Parameters
`states`	IntArray: This value cannot be `null`.

Return
`MutableList<BluetoothDevice!>`	This value cannot be `null`.