Is it possible to automatically accept a Bluetooth connection?
In the Android 2.3.3 BluetoothChat example with the createInsecureRfcommSocketToServiceRecord () API, users are still prompted to accept the pairing request, even if no PIN is specified.
Is there a way to automate a bluetooth pairing request without user intervention? Or is it not possible due to security concerns? I've been looking online for 2 days now and haven't found much, so if anyone knows please post.
Thank!
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Not with standard API, no: if the MAC address is not already in the pairing database, there will always be a prompt. I was told that if you have a device that has been rooted and has public read / write access to the DBus endpoint of the bluetooth service, you can work around this, but I have never seen this actually implemented.
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So I had this solution in case anyone needs an answer to this while working in android 4.4.2
IntentFilter filter = new IntentFilter(
"android.bluetooth.device.action.PAIRING_REQUEST");
/*
* Registering a new BTBroadcast receiver from the Main Activity context
* with pairing request event
*/
registerReceiver(
new PairingRequest(), filter);
and the code for the recipient
public static class PairingRequest extends BroadcastReceiver {
public PairingRequest() {
super();
}
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.bluetooth.device.action.PAIRING_REQUEST")) {
try {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
int pin=intent.getIntExtra("android.bluetooth.device.extra.PAIRING_KEY", 0);
//the pin in case you need to accept for an specific pin
Log.d("PIN", " " + intent.getIntExtra("android.bluetooth.device.extra.PAIRING_KEY",0));
//maybe you look for a name or address
Log.d("Bonded", device.getName());
byte[] pinBytes;
pinBytes = (""+pin).getBytes("UTF-8");
device.setPin(pinBytes);
//setPairing confirmation if neeeded
device.setPairingConfirmation(true);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
and in the manifest file
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
and broadcastReceiver
<receiver android:name=".MainActivity$PairingRequest">
<intent-filter>
<action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
<action android:name="android.bluetooth.device.action.PAIRING_CANCEL" />
</intent-filter>
</receiver>
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I faced the same problem, hope the following code helps: we need:
<receiver android:name=".broadcast.PairingRequest">
<intent-filter>
<action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
<action android:name="android.bluetooth.device.action.PAIRING_CANCEL" />
</intent-filter></receiver>
Second, we need a BluetoothDevice class and:
public class PairingRequest extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent){
if (intent.getAction().equals("ACTION_PAIRING_REQUEST")) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
byte[] pinBytes = BluetoothDevice.convertPinToBytes("1234");
device.setPin(pinBytes);
}
}
}
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