更新Android 4.2.2后，蓝牙流停止。至4.4.2

我正在开发Android应用程序，它不断地从医疗设备接收数据。配置为串行Com端口的设备

在安卓4.2.2上，一切正常。在将华硕K00E更新为安卓4.4.2之后，出现了一个问题

连接后，设备立即开始传输数据。 Asus正常接收数据几秒钟后停止。 日志中没有错误

视频在此：

注意最后几秒钟

连接片段：

    protected Void ConnectToCardioBT(BluetoothDevice device) {
    try {
        Method m = null;
        try {
            m = device.getClass().getMethod("createRfcommSocket",
                    new Class[] { int.class });
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
        try {
            socket = (BluetoothSocket) m.invoke(device, Integer.valueOf(1));
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        socket.connect();

    private class ConnectedThread extends Thread {
    private final InputStream mmInStream;

    public ConnectedThread(BluetoothSocket socket) {
        InputStream tmpIn = null;
        try {
            tmpIn = socket.getInputStream();
        } catch (IOException e) {
        }
        mmInStream = tmpIn;
    }

    public void run() {

        byte[] buffer = new byte[2048];
        int bytes; 

        while (true) {
            try {

                Log.d(TAG,Integer.toString(mmInStream.available())+": " + new Date().getTime());
                bytes = mmInStream.read(buffer);

从流片段读取：

    protected Void ConnectToCardioBT(BluetoothDevice device) {
    try {
        Method m = null;
        try {
            m = device.getClass().getMethod("createRfcommSocket",
                    new Class[] { int.class });
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
        try {
            socket = (BluetoothSocket) m.invoke(device, Integer.valueOf(1));
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        socket.connect();

    private class ConnectedThread extends Thread {
    private final InputStream mmInStream;

    public ConnectedThread(BluetoothSocket socket) {
        InputStream tmpIn = null;
        try {
            tmpIn = socket.getInputStream();
        } catch (IOException e) {
        }
        mmInStream = tmpIn;
    }

    public void run() {

        byte[] buffer = new byte[2048];
        int bytes; 

        while (true) {
            try {

                Log.d(TAG,Integer.toString(mmInStream.available())+": " + new Date().getTime());
                bytes = mmInStream.read(buffer);

---

非常感谢您的帮助。

解决方案如下：

由于一些未知的原因，需要定期向发送设备发送一些命令。在这种情况下，传输不会停止。如果有人知道原因，请发表评论。谢谢