0

我正在开发一个聊天 Android 应用程序，我可以在其中与另一台设备进行视频通话。现在我希望用户能够使用蓝牙设备，例如耳塞等。

我能够检测到蓝牙设备何时连接以及蓝牙设备的连接状态，但是连接后我在蓝牙设备上听不到任何声音。代码如下

这是连接蓝牙设备时通知我的 BlutootheProfile.ServiceListener

var mBluetoothA2dp: BluetoothA2dp? = null
    private val mProfileListener: BluetoothProfile.ServiceListener =
        object : BluetoothProfile.ServiceListener {
            override fun onServiceConnected(profile: Int, proxy: BluetoothProfile) {
                if (profile == BluetoothProfile.A2DP) {
                   mBluetoothA2dp = proxy as BluetoothA2dp
                    mBluetoothA2dp?.let {
                        val connectedDevices: List<BluetoothDevice> = it.connectedDevices
                        val statesToCheck = intArrayOf(BluetoothA2dp.STATE_DISCONNECTED)
                        val disconnectedDevices: List<BluetoothDevice> = it.getDevicesMatchingConnectionStates(statesToCheck)
                        
                        // Should i do something here...????
                    } ?: run {
                        // no devices are connected
                    }
                }
            }

            override fun onServiceDisconnected(profile: Int) {
                if (profile == BluetoothProfile.A2DP) {
                    mBluetoothA2dp = null
                }
            }
        }

这是通知我移动设备蓝牙连接状态的蓝牙广播接收器

var mReceiver: BroadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context?, intent: Intent) {
            val action = intent.action
            var state = BluetoothHeadset.STATE_DISCONNECTED
            val previousState = intent.getIntExtra(BluetoothHeadset.EXTRA_PREVIOUS_STATE, BluetoothHeadset.STATE_DISCONNECTED)
            if (action == BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED) {
                state = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE, BluetoothHeadset.STATE_DISCONNECTED)
                if (state == BluetoothHeadset.STATE_CONNECTED) {
                    val mConnectedHeadset =
                        intent.getParcelableExtra<Parcelable>(BluetoothDevice.EXTRA_DEVICE) as BluetoothDevice
                    println("## Device name ${mConnectedHeadset.name}")


                    // What should i do here...???



                } else if (state == BluetoothHeadset.STATE_DISCONNECTED) {
                    println("## BluetoothHeadset.STATE_DISCONNECTED")
                }
            } else if (action == BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED) {
                
            }
        }
    }

在 VideoActivity 的 onCreate 方法中，我有

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        audioManager = SystemServiceUtils.getAudioManager(this)
       
        // Get the default adapter
        val mBluetoothAdapter: BluetoothAdapter = BluetoothAdapter.getDefaultAdapter()
        // Establish connection to the proxy.
        mBluetoothAdapter.getProfileProxy(this, mProfileListener, BluetoothProfile.A2DP)

        registerReceiver(mReceiver, IntentFilter(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED))
        registerReceiver(mReceiver, IntentFilter(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED))

        audioManager.mode = AudioManager.MODE_IN_COMMUNICATION

和 onDestroy

   ...
   unregisterReceiver(mReceiver)

视频通话开始后，我无法从蓝牙设备听到其他参与者的声音。我到底应该做什么？

4

0 回答 0