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我在 NativeScript 中有一个项目，我正在通过 JavaScript 访问蓝牙 android api，如下例所示：

android.bluetooth.BluetoothAdapter.getDefaultAdapter();

我能够找到配对的设备并连接到它们。我想要一些如何将数据转发到设备并返回该设备的示例。

我在 android 文档中看到了一些关于：getOutputStream()
和 getInputStream()

但我不知道如何通过 JavaScript 使用它。

我想要的是向 Elm327 OBD2 设备发送命令并从该设备接收数据。

示例本机代码：

private OutputStream outputStream;
private InputStream inStream;

private void init() throws IOException {
BluetoothAdapter blueAdapter = BluetoothAdapter.getDefaultAdapter();
if (blueAdapter != null) {
    if (blueAdapter.isEnabled()) {
        Set<BluetoothDevice> bondedDevices = blueAdapter.getBondedDevices();

        if(bondedDevices.size() > 0) {
            Object[] devices = (Object []) bondedDevices.toArray();
            BluetoothDevice device = (BluetoothDevice) devices[position];
            ParcelUuid[] uuids = device.getUuids();
            BluetoothSocket socket = device.createRfcommSocketToServiceRecord(uuids[0].getUuid());
            socket.connect();
            outputStream = socket.getOutputStream();
            inStream = socket.getInputStream();
        }

        Log.e("error", "No appropriate paired devices.");
    } else {
        Log.e("error", "Bluetooth is disabled.");
    }
  }
}

public void write(String s) throws IOException {
   outputStream.write(s.getBytes());
}

public void run() {
   final int BUFFER_SIZE = 1024;
   byte[] buffer = new byte[BUFFER_SIZE];
   int bytes = 0;
   int b = BUFFER_SIZE;

while (true) {
    try {
        bytes = inStream.read(buffer, bytes, BUFFER_SIZE - bytes);
    } catch (IOException e) {
        e.printStackTrace();
    }
  }
}
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