Sorry for question. It's my first time here. I did some search on net but no result. Really need help to clarify this problem. I have two question about USB headset detection and status query.
My target device is running Android version 7.1.1. The device has a USB type-c connector and support USB type-c headset. However it seems AudioService will not send intent when USB headset status changed. Does OEM have to implement his own intent for this case?
For traditional wire headset, I can use AudioManager.isWiredHeadsetOn() to check it's status. But USB type-c headset seems not work in this way. Is there any other way to get the status of USB headset?
Thanks, Lei
You can register a BroadcastReceiver with a filter for AudioManager.ACTION_HEADSET_PLUG
Then in your receiver you can get a list of connected devices with devices = audioManager.getDevices(GET_DEVICES_OUTPUTS)
Then you can filter that list by looking for USB headset by checking the type:
device.type == AudioDeviceInfo.TYPE_USB_HEADSET
You might want to also look at TYPE_WIRED_HEADPHONE, TYPE_WIRED_HEADSET, TYPE_LINE_ANALOG
As addition to EscapeArtist proposed approach, you can also listen for UsbManager.ACTION_USB_DEVICE_ATTACHED and UsbManager.ACTION_USB_DEVICE_DETACHED actions and check wither the current connected USB device has audio interface UsbConstants.USB_CLASS_AUDIO. Unfortunately, AudioManager.ACTION_HEADSET_PLUG is not triggered for composite (don't sweat the wording) USB devices, such as OTG + standard USB headphones, or just USB-C headphones.
override fun onReceive(context: Context, intent: Intent) { if (intent.action == UsbManager.ACTION_USB_DEVICE_ATTACHED) { context.usbManager.deviceList.values.indexOfFirst { it.hasUsbAudioInterfaceClass() }.takeIf { it > -1 }?.run { //This attached USB device has audio interface } } else if (intent.action == UsbManager.ACTION_USB_DEVICE_DETACHED) { val device: UsbDevice? = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE) device?.apply { if (hasUsbAudioInterfaceClass()) { //This detached USB device has audio interface } } } }
UsbDevice extension function that searches wither USB device has audio dedicated audio interface.
fun UsbDevice.hasUsbAudioInterfaceClass(): Boolean { for (i in 0 until interfaceCount) { if (getInterface(i).interfaceClass == UsbConstants.USB_CLASS_AUDIO) { return true } } return false }
Listening for detaching devices is not mandatory, since you can rely on ACTION_AUDIO_BECOMING_NOISY.
