Yes, I found a working solution for running Bluetooth background in Android. Below is the code I have used in my android app. public class BluetoothServices extends Service { private BluetoothAdapter mBluetoothAdapter; public static final String B_DEVICE = “MY DEVICE”; public static final String B_UUID = “00001101-0000-1000-8000-00805f9b34fb”; // 00000000-0000-1000-8000-00805f9b34fb public static final int STATE_NONE = … Read more
I use DataInputStreams instead as you can do a readFully() method which waits to read a certain number of bytes before returning. I setup the BT connection like this: BluetoothDevice btDevice = bta.getRemoteDevice(macAddress); BluetoothSocket btSocket = InsecureBluetooth.createRfcommSocketToServiceRecord( btDevice, UUID.fromString(“00001101-0000-1000-8000-00805F9B34FB”), false); btSocket.connect(); InputStream input = btSocket.getInputStream(); DataInputStream dinput = new DataInputStream(input); then later on when I … Read more
createInsecureRfcommSocketToServiceRecord() was included starting with Android API Level 10, so the documentation will encourage you to use it since the docs always follow the latest version of the API. If you are targeting an API lower than 10 (a.k.a. 2.3.3 or Gingerbread), then that method is not publicly accessible to you. The method you are … Read more
Extending what pwc said about the UUID being 0x1101, this is the 16 bit version of the UUID as far as I can tell. I could not work out how to instantiate an UUID with a 16 bit UUID. But as this post says you can do it by: private static final UUID MY_UUID = … Read more
If you want to get UUID / any other data e.g. Manufacturer Data out of scanRec[] bytes after BLE Scan, you first need to understand the data format of those Advertisement Data packet. Came from Bluetooth.org: Too much theory, want to see some code snippet? This function below would straight forward print parsed raw data … Read more
Is it possible? In which scenario such unitialized exceptions can be thrown?? This is not possible using a conformant Java compiler and conformant Java virtual machine, and by extension a conformant Dalvik virtual machine. The JLS doesn’t allow the e variable to be null at that location Either you’ve got a buggy virtual machine, a … Read more
This code works for me. private void pairDevice(BluetoothDevice device) { try { if (D) Log.d(TAG, “Start Pairing…”); waitingForBonding = true; Method m = device.getClass() .getMethod(“createBond”, (Class[]) null); m.invoke(device, (Object[]) null); if (D) Log.d(TAG, “Pairing finished.”); } catch (Exception e) { Log.e(TAG, e.getMessage()); } } private void unpairDevice(BluetoothDevice device) { try { Method m = device.getClass() … Read more
I needed to solve this problem myself. The crucial step was finding this code, which told me to add the android.bluetooth package to my project, and add the files IBluetooth.aidl and IBluetoothCallback.aidl (which you’ll find at the link). Once you instantiate the IBluetooth object, you have access to the BluetoothService class, and can use any … Read more
We can confirm the Bluetooth disconnect after 6 seconds when communicating from our Nexus 4 app to an external Bluetooth ECG (medical device) after upgrading from Android 4.2 to 4.3. This happens specifically during an ECG measurement with lots of inbound data (from ECG to the Android app) but no outbound data. “Normal” Bluetooth communication … Read more
This little test worked for me… it involves setting up the bluetooth headset as the input also (not sure if that’s what you want). Sorry about the crappy formatting on the code… // create and set up the audio session AVAudioSession* audioSession = [AVAudioSession sharedInstance]; [audioSession setDelegate:self]; [audioSession setCategory: AVAudioSessionCategoryPlayAndRecord error: nil]; [audioSession setActive: YES … Read more