This is a Udacity Android Nano degree project. The project gives you two 'legacy' code bases and has you fix a few bugs and add some new features.
The football scores app requires an api key to communicate with the api service. I have extracted that api key to a gradle property variable. You will need to have a gradle.properties file in your ~/.gradle directory and in that file you will need to have a line in the file that looks like this: FOOTBALL_SCORES_API_KEY=your_api_key