android-bluetooth

In this question , @nhoxbypass provides this method for the purpose of adding found Bluetooth devices to a list: private BroadcastReceiver myReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Message msg = Message.obtain(); String action = intent.getAction(); if(BluetoothDevice.ACTION_FOUND.equals(action)){ //Found, add to a device list } } }; However, I do not understand how a reference to the found device can be obtained, how can this be done? I do not have permission to comment on the original question, so I have chosen to extend it here.

So im a newbie in android still, but ive been working on an app that basically i want it to communicate with an arduino through bluetooth, but the point here is that when im trying to configure the bluetooth code, i get thrown an error in the logcat, which is: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.OutputStream android.bluetooth.BluetoothSocket.getOutputStream()' on a null object reference" , and this has really been giving me problems for a week and i cant find a slution, im sure this is not that complicated for an experienced programmer, so id really

I have a working ble device with android . it sends and receives data finely through the Android app. But Now My Problem is I want to send Some Audio HEX files to my BLE Device. And its larger Than 20 bytes. How Can i send such a data to a BLE Device. ?? For send data upper than 20bytes, you need to change the MTU-exchange. To API LEVEL 21, you can use requestMtu ( Android Developer ), it negotiates with the peripherical device and you can define until 512 bytes. The MTU value is defined in peripherical side. Remember the data size that you can send is MTU-3 bytes. For API LEVEL less than 21,

I am working on bluetooth for the first time. I got the list of paired devices. Now my requirement is I need to send some data (a string) to the device. how can I do that? I tried searching but didn't find anything useful. Could anyone help out this? Something like this might suffice: DataOutputStream os; BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter(); BroadcastReceiver discoveryResult = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String remoteDeviceName = intent.getStringExtra(BluetoothDevice.EXTRA_NAME); BluetoothDevice remoteDevice;

In an answer to another question , I saw that "You can also transmit as a beacon on rooted Android 4.4.3 devices, but it requires an app installed with system privileges." How can this be done? Yes, this is possible on 4.4.3, but the critical API methods startAdvertising() , stopAdvertising() and getAdvScanData() (which allows you to read and write the raw information sent out in the advertisement) are blocked from use unless an app has android.permission.BLUETOOTH_PRIVILEGED . This is a system-level permission, so the only way to get this is for your custom app is to root your phone, and