安卓:戴被报道为连接蓝牙耳机的手表？
安卓:戴被报道为连接蓝牙耳机的手表？
提问于 2022-06-24 23:25:00
我的倒计时应用程序使用文本到语音提供音频倒计时。
当应用程序检测到蓝牙扬声器时，音频会发送给该扬声器。
像三星手表4和TicWatch Pro 3这样的可穿戴设备被报告为耳机！
我最初的onCreate()包括：
// Check if a speaker is connected
if (bluetoothAdapter.getProfileConnectionState(BluetoothHeadset.HEADSET) == BluetoothHeadset.STATE_CONNECTED)
sendSpeechToSpeaker()
else
sendSpeechToPhone()问题1，，对上面的问题是否有一个简单的修正，只会检测连接的耳机？
我的解决办法是单独检查每个连接的蓝牙设备，忽略那些不是耳机的设备。
问题2，，有人能提出比我的解决办法更简单的方法吗？
解决办法
在初始化过程中，每个连接的蓝牙设备都会被检查，如果它们实际上是一个耳机，音频将被重新路由。
检查每个连接设备的btServiceListener
val btServiceListener: ServiceListener = object : ServiceListener {
// used to scan all CONNECTED Bluetooth devices looking for external speakers ...
override fun onServiceConnected(profile: Int, proxy: BluetoothProfile) {
if (profile == BluetoothProfile.HEADSET) {
val connectionStates = intArrayOf(BluetoothProfile.STATE_CONNECTED)
// get all connected headsets
val connectedHeadsetList = proxy.getDevicesMatchingConnectionStates(connectionStates)
for (connectedHeadset in connectedHeadsetList) {
// check each headset and check if it is ACTUALLY a headset
val majorMask = BluetoothClass.Device.Major.UNCATEGORIZED // actually want to use BITMASK but some Fwit declared it private !
val isHeadset = (connectedHeadset.bluetoothClass?.deviceClass?.and(majorMask) == BluetoothClass.Device.Major.AUDIO_VIDEO)
if (isHeadset)
sendSpeechToSpeaker()
}
}
bluetoothAdapter.closeProfileProxy(BluetoothProfile.HEADSET, proxy) // here we are finished with the proxy so clear
}
override fun onServiceDisconnected(profile: Int) {}
}上面的侦听器在onCreate()中被调用
// search the list of connected bluetooth headsets
bluetoothManager = getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
bluetoothAdapter = bluetoothManager.adapter
bluetoothAdapter.getProfileProxy(this, btServiceListener, BluetoothProfile.HEADSET);听者使用大面罩耳机代码是(0x0400)三星Galaxy是可穿戴的(0x0700) TicWatch Pro 3全球定位系统是未分类的(0x1F00)
为了简单起见，我没有显示BTListener中所需的相同代码，以确保如果手表断开连接，它就不会将音频从扬声器发送出去！
回答 1
Stack Overflow用户
发布于 2022-10-25 23:51:02
可以通过直接检查音频属性来避免上述问题，而不是解析每个连接的蓝牙设备。
private fun routeTTSAudioOutput() {
// on start and when changes are detected ensure audio is being routed correctly
val bluetoothA2DPConnected = audioOutputAvailable(AudioDeviceInfo.TYPE_BLUETOOTH_A2DP)
if (bluetoothA2DPConnected) {
if (!bluetoothSCOTurnedOn) audioManager.startBluetoothSco()
audioManager.mode = AudioManager.MODE_IN_CALL
} else {
if (bluetoothSCOTurnedOn) audioManager.stopBluetoothSco()
audioManager.mode = AudioManager.MODE_NORMAL
}
audioManager.isSpeakerphoneOn = !bluetoothA2DPConnected
bluetoothSCOTurnedOn = bluetoothA2DPConnected
bundleTTS = Bundle()
bundleTTS.putInt(TextToSpeech.Engine.KEY_PARAM_STREAM, audioManager.mode)
this.runOnUiThread { bluetoothConnectedImageView.visibility = if (bluetoothA2DPConnected) ImageView.VISIBLE else ImageView.INVISIBLE }
}音频回调使用上述功能将文本路由到语音。
private val audioDeviceCallback : AudioDeviceCallback = object : AudioDeviceCallback() {
override fun onAudioDevicesAdded(addedDevices: Array<out AudioDeviceInfo>?) {
super.onAudioDevicesAdded(addedDevices)
routeTTSAudioOutput()
}
override fun onAudioDevicesRemoved(removedDevices: Array<out AudioDeviceInfo>?) {
super.onAudioDevicesRemoved(removedDevices)
routeTTSAudioOutput()
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72750231
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