Not able to connect a Bluetooth Keyboard to an android device

问题

I am trying to programmatically connect an Android phone to a Bluetooth device (which is already paired). I am using createRfcommSocketToServiceRecord(UUID) method in a thread.

I know the Bluetooth keyboard is a HID device so I am using UUID as

00001124-0000-1000-8000-00805f9b34fb

The above method returns a BluetoothSocket object, but it fails to connect to the HID device, when bluetoothSocket.connect() is called. It gives IOException: discovery failed

I have searched about this a lot, but no clue how to fix this.

Is it only possible to connect Rfcomm and not HID devices using this approach in Android? If so, then what alternate approach should I use for this? I am using Samsung Galaxy S3 with Android 4.1 in this application and after pairing (from settings) I could type using the Bluetooth keyboard in some inbuilt apps like SMS, Email etc. It seems to me that connecting to it should be possible, but I am not sure if I am using the right approach. I want to read the keypress serial data in my app.

Here's the code which I am using:

private class ConnectThread extends Thread {
    private final BluetoothSocket mmSocket;

    public ConnectThread(BluetoothDevice device) {
        BluetoothSocket tmp = null;
        try {
            tmp = device.createRfcommSocketToServiceRecord(mUUID);
        } catch (IOException e) {
            e.printStackTrace();
        }
        mmSocket = tmp;
    }

    public void run() {
        try {
            mmSocket.connect();
        } catch (IOException connectException) {
            try {
                mmSocket.close();
            } catch (IOException closeException) { }
            return;
        }

        Log.d(TAG, "ConnectThread connection successful");
    }

    public void cancel() {
        try {
            mmSocket.close();
        } catch (IOException e) { }
    }
}