Problem: I am being notified when a bluetooth device is pairing, or becomes paired. However, I do not know how to get notified when a device is being unpaired. How could I get my app to recognize when it has become unpaired with my device?
Example: Let's say that I pair my surface tablet and my android phone through code. My broadcast receiver will register the ACTION_BOND_STATE_CHANGED
intent and allow me to process it however I want. Now, if I want to unpair my surface tablet, I do not get notified on my phone that the device has become unpaired. If I check, device.getBondState()
for the device after it has been unpaired, it equals BOND_BONDED
(which it clearly isnt) I can get it to recognize it is unpaired again after I try to connect to the unpaired device, then the app crashes and then when I turn the app on again, only then does it recognize it as unpaired.
Scenario: I have a BroadcastReceiver
registered to listen for intents caused by a BluetoothDevice
getActivity().registerReceiver(broadcastReceiver, new IntentFilter(BluetoothDevice.ACTION_FOUND));
getActivity().registerReceiver(broadcastReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
getActivity().registerReceiver(broadcastReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED));
getActivity().registerReceiver(broadcastReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED));
I process these Actions with this BroadcastReciever
:
final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
System.out.println("ACTION: "+ action);
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
list();
// Get the BluetoothDevice object from the intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
System.out.println("FOUND: " + device.getName() + " STATE: " + device.getBondState());
mapInput(device);
// Add the name and the mac address of the object to the array adapter
BTSimpleAdapter.notifyDataSetChanged();
} else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
System.out.println("UPDATE Name " + device.getName() + " Value " + device.getAddress() + " Bond state " + device.getBondState());
for (Map<String, String> entry : data) {
if (entry.get("Name").equals(device.getName()) && entry.get("Value").equals(device.getAddress())) {
if (device.getBondState() == BluetoothDevice.BOND_NONE) {
entry.put("Paired", "Unpaired");
} else if (device.getBondState() == BluetoothDevice.BOND_BONDING) {
entry.put("Paired", "Pairing");
} else {
entry.put("Paired", "Paired");
}
BTSimpleAdapter.notifyDataSetChanged();
}
}
}
}
};