Fix Java Android Tournament App

I need an experienced Android developer to fix compilation errors in my tournament app's source code. The project includes documentation and database files, along with an admin panel integrated within the app source code.

Requirements:
- Fix compilation errors
- Provide a fixed version of the code
- Build a demo app for me

Ideal Skills and Experience:
- Proficiency in Java and Android development
- Experience with troubleshooting and fixing compilation errors
- Knowledge of building and deploying demo apps