android开发 获取当前绑定的蓝牙设备的几种方法

获取当前绑定的蓝牙设备有以下几种方法：

1. 通过BluetoothAdapter.getDefaultAdapter().getBondedDevices()获取所有已绑定的设备，再遍历获取当前连接的设备。

BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> bondedDevices = adapter.getBondedDevices();
for (BluetoothDevice device : bondedDevices) {
    if (device.getBondState() == BluetoothDevice.BOND_BONDED && device.isConnected()) {
        // 当前连接的设备
        // device.getName()获取设备名，device.getAddress()获取设备地址
    }
}

2. 使用BroadcastReceiver监听BluetoothDevice.ACTION_ACL_CONNECTED广播，获取连接的设备。

private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            // 连接的设备
            // device.getName()获取设备名，device.getAddress()获取设备地址
        }
    }
};

// 注册广播
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED);
registerReceiver(mReceiver, filter);

3. 使用BluetoothProfile.ServiceListener监听BluetoothProfile.HEADSET连接状态，获取连接的设备。

private final BluetoothProfile.ServiceListener mListener = new BluetoothProfile.ServiceListener() {
    @Override
    public void onServiceConnected(int profile, BluetoothProfile proxy) {
        if (profile == BluetoothProfile.HEADSET) {
            List<BluetoothDevice> devices = proxy.getConnectedDevices();
            if (!devices.isEmpty()) {
                BluetoothDevice device = devices.get(0);
                // 连接的设备
                // device.getName()获取设备名，device.getAddress()获取设备地址
            }
        }
    }

    @Override
    public void onServiceDisconnected(int profile) {
        // 断开连接
    }
};

// 获取BluetoothHeadset
BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
adapter.getProfileProxy(context, mListener, BluetoothProfile.HEADSET);