After three days I got it figured out thanks to some very helpful posts. I had to replace: tmp = device.createRfcommSocketToServiceRecord(MY_UUID); with: Method m = device.getClass().getMethod(“createRfcommSocket”, new Class[] {int.class}); tmp = (BluetoothSocket) m.invoke(device, 1); and voilà it works!
Manifest permission <uses-permission android:name=”android.permission.BLUETOOTH” /> <uses-permission android:name=”android.permission.BROADCAST_STICKY” /> <uses-permission android:name=”android.permission.MODIFY_AUDIO_SETTINGS” /> Create an inner class BluetoothHelper extends BluetoothHeadSetUtils in your Activity or Service. Declare a class member mBluetoothHelper and instantiate it in onCreate() BluetoothHelper mBluetoothHelper; @Override public void onCreate() { mBluetoothHelper = new BluetoothHelper(this); } @Override onResume() { mBluetoothHelper.start(); } @Override onPause() { mBluetoothHelper.stop(); } … Read more
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(); … Read more
The distance estimate provided by iOS is based on the ratio of the beacon signal strength (rssi) over the calibrated transmitter power (txPower). The txPower is the known measured signal strength in rssi at 1 meter away. Each beacon must be calibrated with this txPower value to allow accurate distance estimates. While the distance estimates … Read more
For an iBeacon with ProximityUUID E2C56DB5-DFFB-48D2-B060-D0F5A71096E0, major 0, minor 0, and calibrated Tx Power of -59 RSSI, the transmitted BLE advertisement packet looks like this: d6 be 89 8e 40 24 05 a2 17 6e 3d 71 02 01 1a 1a ff 4c 00 02 15 e2 c5 6d b5 df fb 48 d2 b0 … Read more
I have finally found a workaround. The magic is hidden under the hood of the BluetoothDevice class (see https://github.com/android/platform_frameworks_base/blob/android-4.3_r2/core/java/android/bluetooth/BluetoothDevice.java#L1037). Now, when I receive that exception, I instantiate a fallback BluetoothSocket, similar to the source code below. As you can see, invoking the hidden method createRfcommSocket via reflections. I have no clue why this method is … Read more
Use can use android.bluetooth. This can give you a place to start.