获取A2DP中连接的蓝牙耳机MAC地址

Question

目标：当我知道它已连接时，打开当前连接的A2DP设备的蓝牙插座。

为了连接套接字，我需要该设备的MAC地址。

正如我目前所了解的那样，有两种听众可以获得蓝牙状态：

1- BluetoothAdapter.getProfileProxy（），如此处所述How to get bluetooth connected devices using BluetoothHeadset API

当蓝牙卡开启/关闭时，
• 触发。
• 允许获取特定的bluetoothProfile（例如A2DP），然后是此配置文件的已连接设备列表，然后是此连接设备的mac地址。
• 当＆＃34; onServiceConnected＆＃34;时，设备列表永远为空被叫（设备在蓝牙卡启动后需要更多时间连接）。所以我需要在设备连接之后将其称为。

2- BluetoothDevice.ACTION_ACL_CONNECTED上的广播接收器，如此处所述How to programmatically tell if a Bluetooth device is connected? (Android 2.2)

• 在连接/断开蓝牙设备时触发。
• 不允许获取此设备的任何信息

因此我需要在连接A2DP设备时使用它们来触发...然后获取此设备的MAC地址（然后打开btSocket）： 在BroadcastReceiver＆＃34; BluetoothDevice.ACTION_ACL_CONNECTED＆＃34;内启动btAdapter.getProfileProxy，但延迟时间为3秒，以便连接。

这是唯一（复杂）的方法吗？

    onCreate{
    context.registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED));
    context.registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED);
    }

    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent)
    {
        Log.d(TAG, "Action received\n");
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action))
        {
            Log.d(TAG, "ACTION_ACL_CONNECTED received\n");

            timerHandler.postDelayed(timerRunnableBtConnection, 3000);
        }
        else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action))
        {
            Log.d(TAG, "ACTION_ACL_DISCONNECTED received\n");
            btAdapter.closeProfileProxy(BluetoothProfile.A2DP, btA2dp);
        }
    }
    private Runnable timerRunnableBtConnection = new Runnable() {
        @Override
        public void run() {
            btAdapter.getProfileProxy(intelloApplication.getAppContext(), mProfileListener, BluetoothProfile.A2DP);
        }
    };
};

// Define Service Listener of BluetoothProfile
// then create the btSocket on it
private BluetoothProfile.ServiceListener mProfileListener = new BluetoothProfile.ServiceListener() {
    public void onServiceConnected(int profile, BluetoothProfile proxy) {
        if (profile == BluetoothProfile.A2DP) {
            Log.d(TAG, "Bluetooth connected\n");
            btA2dp = (BluetoothA2dp) proxy;
            List<BluetoothDevice> devices = btA2dp.getConnectedDevices();
            Log.d(TAG, "List of " + devices.size() + " device\n");
            for ( final BluetoothDevice dev : devices ) {
                String address = dev.getAddress();
                Log.d(TAG, "Name: " + dev.getName() + " and address: " + address + "\n");
                    btDevice = btAdapter.getRemoteDevice(address);

                    try {
                        btSocket = createBluetoothSocket(btDevice);
                    } catch (IOException e) {
                        Log.d(TAG, e.getMessage());
                    }

                    Log.d(TAG, "...Connecting...");
                    try {
                        btSocket.connect();
                        useBluetooth = true;
                        Log.d(TAG, "....Connection ok...");
                    } catch (IOException e) {
                        try {
                            btSocket.close();
                            useBluetooth = false;
                            Log.d(TAG, "....Close connection.");
                        } catch (IOException e2) {
                            Log.d(TAG, "Unable to close socket during connection failure");
                            Log.d(TAG, e2.getMessage());
                        }
                    }

                    // Create a data stream so we can talk to server.
                    Log.d(TAG, "...Create Socket...");

                    mConnectedThread = new ConnectedThread(btSocket);
                    mConnectedThread.start();
                }
            }
        }
    }

    public void onServiceDisconnected(int profile) {
        if (profile == BluetoothProfile.A2DP) {
            Log.d(TAG, "Bluetooth disconnected\n");
        }
    }
};