AndroJena represents a porting of Apache Jena to the Android platform. Hence, it represents an ideal starting place for working with semantic web data on mobile systems.
To help people to get started with AndroJena, I’ve created separate Android Studio modules for AndroJena, ARQoid and Lucenoid (i.e., ported Android versions of their Jena counterparts). I also created a simple AndroidRules project that includes these modules to perform ontology reasoning, utilizing an OWL2 RL ruleset . Clearly, you can use any other ruleset as well. You can find everything on GitHub!
The project was created to be usable out-of-the-box — just point Android Studio towards the project folder (File > Open…) and select the AndroidRules project. If you run into issues, checkout the README file.
The AndroidRules app loads a small subset of the pizza ontology and infers types for DominosMargheritaPizza.
In another post I describe a project that implements OWL2 RL reasoning using the regular Apache Jena.
 W. Van Woensel, S.S.R. Abidi, Benchmarking Semantic Reasoning on Mobile Platforms: Towards Optimization Using OWL2 RL, Semant. Web J. (2018).