BluetoothHeadset

ACTION_AUDIO_STATE_CHANGED

String ACTION_AUDIO_STATE_CHANGED

Intent used to broadcast the change in the Audio Connection state of the A2DP profile.

This intent will have 3 extras:

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

EXTRA_STATE or EXTRA_PREVIOUS_STATE can be any of STATE_AUDIO_CONNECTED, STATE_AUDIO_DISCONNECTED,

Requires BLUETOOTH permission to receive.

Constant Value: "android.bluetooth.headset.profile.action.AUDIO_STATE_CHANGED"

ACTION_CONNECTION_STATE_CHANGED

String ACTION_CONNECTION_STATE_CHANGED

Intent used to broadcast the change in connection state of the Headset profile.

This intent will have 3 extras:

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

EXTRA_STATE or EXTRA_PREVIOUS_STATE can be any of STATE_DISCONNECTED, STATE_CONNECTING, STATE_CONNECTED, STATE_DISCONNECTING.

Requires BLUETOOTH permission to receive.

Constant Value: "android.bluetooth.headset.profile.action.CONNECTION_STATE_CHANGED"

ACTION_VENDOR_SPECIFIC_HEADSET_EVENT

String ACTION_VENDOR_SPECIFIC_HEADSET_EVENT

Intent used to broadcast that the headset has posted a vendor-specific event.

This intent will have 4 extras and 1 category.

• EXTRA_DEVICE - The remote Bluetooth Device
• EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD - The vendor specific command
• EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE - The AT command type which can be one of AT_CMD_TYPE_READ, AT_CMD_TYPE_TEST, or AT_CMD_TYPE_SET, AT_CMD_TYPE_BASIC,AT_CMD_TYPE_ACTION.
• EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_ARGS - Command arguments.

The category is the Company ID of the vendor defining the vendor-specific command. BluetoothAssignedNumbers For example, for Plantronics specific events Category will be VENDOR_SPECIFIC_HEADSET_EVENT_COMPANY_ID_CATEGORY.55

For example, an AT+XEVENT=foo,3 will get translated into

• EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD = +XEVENT
• EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE = AT_CMD_TYPE_SET
• EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_ARGS = foo, 3

Requires BLUETOOTH permission to receive.

Constant Value: "android.bluetooth.headset.action.VENDOR_SPECIFIC_HEADSET_EVENT"

AT_CMD_TYPE_ACTION

int AT_CMD_TYPE_ACTION

AT command type ACTION used with EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE For example, AT+CHUP. There are no arguments for action commands.

Constant Value: 4 (0x00000004)

AT_CMD_TYPE_BASIC

int AT_CMD_TYPE_BASIC

AT command type BASIC used with EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE For example, ATD. Single character commands and everything following the character are arguments.

Constant Value: 3 (0x00000003)

AT_CMD_TYPE_READ

int AT_CMD_TYPE_READ

AT command type READ used with EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE For example, AT+VGM?. There are no arguments for this command type.

Constant Value: 0 (0x00000000)

AT_CMD_TYPE_SET

int AT_CMD_TYPE_SET

AT command type SET used with EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE For example, AT+VGM=.

Constant Value: 2 (0x00000002)

AT_CMD_TYPE_TEST

int AT_CMD_TYPE_TEST

AT command type TEST used with EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE For example, AT+VGM=?. There are no arguments for this command type.

Constant Value: 1 (0x00000001)

EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_ARGS

String EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_ARGS

A Parcelable String array extra field in ACTION_VENDOR_SPECIFIC_HEADSET_EVENT intents that contains the arguments to the vendor-specific command.

Constant Value: "android.bluetooth.headset.extra.VENDOR_SPECIFIC_HEADSET_EVENT_ARGS"

EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD

String EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD

A String extra field in ACTION_VENDOR_SPECIFIC_HEADSET_EVENT intents that contains the name of the vendor-specific command.

Constant Value: "android.bluetooth.headset.extra.VENDOR_SPECIFIC_HEADSET_EVENT_CMD"

EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE

String EXTRA_VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE

An int extra field in ACTION_VENDOR_SPECIFIC_HEADSET_EVENT intents that contains the AT command type of the vendor-specific command.

Constant Value: "android.bluetooth.headset.extra.VENDOR_SPECIFIC_HEADSET_EVENT_CMD_TYPE"

STATE_AUDIO_CONNECTED

int STATE_AUDIO_CONNECTED

Headset state when SCO audio is connected. This state can be one of EXTRA_STATE or EXTRA_PREVIOUS_STATE of ACTION_AUDIO_STATE_CHANGED intent.

Constant Value: 12 (0x0000000c)

STATE_AUDIO_CONNECTING

int STATE_AUDIO_CONNECTING

Headset state when SCO audio is connecting. This state can be one of EXTRA_STATE or EXTRA_PREVIOUS_STATE of ACTION_AUDIO_STATE_CHANGED intent.

Constant Value: 11 (0x0000000b)

STATE_AUDIO_DISCONNECTED

int STATE_AUDIO_DISCONNECTED

Headset state when SCO audio is not connected. This state can be one of EXTRA_STATE or EXTRA_PREVIOUS_STATE of ACTION_AUDIO_STATE_CHANGED intent.

Constant Value: 10 (0x0000000a)

VENDOR_RESULT_CODE_COMMAND_ANDROID

String VENDOR_RESULT_CODE_COMMAND_ANDROID

A vendor-specific command for unsolicited result code.

Constant Value: "+ANDROID"

VENDOR_SPECIFIC_HEADSET_EVENT_COMPANY_ID_CATEGORY

String VENDOR_SPECIFIC_HEADSET_EVENT_COMPANY_ID_CATEGORY

The intent category to be used with ACTION_VENDOR_SPECIFIC_HEADSET_EVENT for the companyId

Constant Value: "android.bluetooth.headset.intent.category.companyid"

getConnectedDevices

List<BluetoothDevice> getConnectedDevices ()

Get connected devices for this specific profile.

Return the set of devices which are in state STATE_CONNECTED

Requires BLUETOOTH permission.

getConnectionState

int getConnectionState (BluetoothDevice device)

Get the current connection state of the profile

Requires BLUETOOTH permission.

getDevicesMatchingConnectionStates

List<BluetoothDevice> getDevicesMatchingConnectionStates (int[] states)

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.

Requires BLUETOOTH permission.

isAudioConnected

boolean isAudioConnected (BluetoothDevice device)

Check if Bluetooth SCO audio is connected.

Requires BLUETOOTH permission.

sendVendorSpecificResultCode

boolean sendVendorSpecificResultCode (BluetoothDevice device, 
                String command, 
                String arg)

Sends a vendor-specific unsolicited result code to the headset.

The actual string to be sent is command + ": " + arg. For example, if command is VENDOR_RESULT_CODE_COMMAND_ANDROID and arg is "0", the string "+ANDROID: 0" will be sent.

Currently only VENDOR_RESULT_CODE_COMMAND_ANDROID is allowed as command.

Requires BLUETOOTH permission.

startVoiceRecognition

boolean startVoiceRecognition (BluetoothDevice device)

Start Bluetooth voice recognition. This methods sends the voice recognition AT command to the headset and establishes the audio connection.

Users can listen to ACTION_AUDIO_STATE_CHANGED. If this function returns true, this intent will be broadcasted with EXTRA_STATE set to STATE_AUDIO_CONNECTING.

EXTRA_STATE will transition from STATE_AUDIO_CONNECTING to STATE_AUDIO_CONNECTED when audio connection is established and to STATE_AUDIO_DISCONNECTED in case of failure to establish the audio connection.

Requires BLUETOOTH permission.

stopVoiceRecognition

boolean stopVoiceRecognition (BluetoothDevice device)

Stop Bluetooth Voice Recognition mode, and shut down the Bluetooth audio path.

Requires BLUETOOTH permission.