Hi, I'm Emanuele Iannone, a master student at University of Salerno.
Since my bachelor's thesis I have been working on a code smell refactoring plugin called aDoctor, which is able to identify and fix energy-related problems in Android apps.
I launched it on your project, finding different instances of code smells. I chose one of them and let the plugin automatically fix it.
In this case I chose Member Ignoring Method, that is present when a non static method does not use at all instance variables and other non static methods. These kind of smell may have a non trivial impact on energy consumption, as shown in this paper: https://www.sciencedirect.com/science/article/pii/S0950584918301678.
Besides, this kind of refactoring does not impact on the functionalities of your app, so it is totally safe. Let me know if you are interested in this refactoring proposal.