This is a free, open-source project. I hacked this app up in an evening, so there is likely to be bugs. If you encounter any issues, I would appreciate if you would file an issue at the link below and mention what device you encountered the bug on. Feature requests are welcome too!
Download the app from the Play Store or the GitHub repo.
Simply import the project into Android Studio.
https://github.com/aagallag/Bluetooth-Link-Key-eXtractor/issues
LKX - Bluetooth Link-Key eXtractor Copyright (C) 2016 Aaron Gallagher
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/.
Contact: Aaron Gallagher <aaron.b.gallagher@gmail.com>