Pairing BluetoothDevice programmatically in Android - connection issue

Question

I've got to write an app which has the prerequisite to allow in-app bluetooth pairing.

Googling around, i found out there's a way of programmatically pair a BluetoothDevice with API level < 19:

Method createBondMethod = BluetoothDevice.class.getMethod("createBond");
Boolean paired = (Boolean) createBondMethod.invoke(device);
if (paired.booleanValue()) {
    Log.i(LOGTAG, "Pairing bluetooth device succeded.");

} else {
    Log.i(LOGTAG, "Pairing bluetooth device failed.");
}

It's a very hacky solution, reflection on private methods is quite never a good solution.. but it seems to be the only one available.

I tried it.. and I manage to pair my tablet with another Bluetooth device (it's neither a smartphone nor a tablet..).

After pairing the two devices, I need to create a BluetoothSocket and connect it.

Here the problem comes:

BluetoothSocket socket = null;
try {
    final UUID uuid = this.mDevice.getUuids()[0].getUuid();
    socket = this.mDevice.createRfcommSocketToServiceRecord(uuid);
    socket.connect();
    Log.e(LOGTAG, "Connected to the socket");
    this.onBluetoothDeviceConnected(socket, this.mDevice);
    return;
} catch (Exception e) {
    // handling exception
}

My this.mDevice is the paired device and it's not null.. But it's got no UUID, in fact the method BluetoothDevice.getUuids() returns a null value.

Have you ever been facing the same problem? Have you got any working solution to this annoing problem?

Thanks everyone!

Avner Gidron Avner Gidron · Accepted Answer · 2015-01-05T10:08:59

I have the same problem now. The getUuid() returns null when it have a problom getting the UUID. speaking to the manufacturer of my device they told me that my device don't support UUID's. I'm currently trying to solve this. if I'll succeed I will tell you

Pairing BluetoothDevice programmatically in Android - connection issue

1 Answers