Detecting state changes made to the BluetoothAdapter?

Question

I have an app with a button on it that I use to turn BT on and off. I have the following code in there;

public void buttonFlip(View view) {
    flipBT();
            


        

Answer 1

public void discoverBluetoothDevices(View view)
    {
        if (bluetoothAdapter!=null)

            bluetoothAdapter.startDiscovery();
            Toast.makeText(this,"Start Discovery"+bluetoothAdapter.startDiscovery(),Toast.LENGTH_SHORT).show();
    }