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2017 IEEE 24th International Conference on Software Analysis, Evolution and Reengineering (SANER) (2017)
Klagenfurt, Austria
Feb. 20, 2017 to Feb. 24, 2017
ISBN: 978-1-5090-5502-9
pp: 115-126
Antonin Carette , Université du Québec à Montréal, Canada
Mehdi Adel Ait Younes , Université du Québec à Montréal, Canada
Geoffrey Hecht , Université du Québec à Montréal, Canada
Naouel Moha , Université du Québec à Montréal, Canada
Romain Rouvoy , University of Lille / Inria, France
ABSTRACT
Android code smells are bad implementation practices within Android applications (or apps) that may lead to poor software quality. These code smells are known to degrade the performance of apps and to have an impact on energy consumption. However, few studies have assessed the positive impact on energy consumption when correcting code smells. In this paper, we therefore propose a tooled and reproducible approach, called HOT-PEPPER, to automatically correct code smells and evaluate their impact on energy consumption. Currently, HOT-PEPPER is able to automatically correct three types of Android-specific code smells: Internal Getter/Setter, Member Ignoring Method, and HashMap Usage. HOT-PEPPER derives four versions of the apps by correcting each detected smell independently, and all of them at once. HOT-PEPPER is able to report on the energy consumption of each app version with a single user scenario test. Our empirical study on five open-source Android apps shows that correcting the three aforementioned Android code smells effectively and significantly reduces the energy consumption of apps. In particular, we observed a global reduction in energy consumption by 4,83% in one app when the three code smells are corrected. We also take advantage of the flexibility of HOT-PEPPER to investigate the impact of three picture smells (bad picture format, compression, and bitmap format) in sample apps. We observed that the usage of optimised JPG pictures with the Android default bitmap format is the most energy efficient combination in Android apps. We believe that developers can benefit from our approach and results to guide their refactoring, and thus improve the energy consumption of their mobile apps.
INDEX TERMS
Energy consumption, Smart phones, Androids, Humanoid robots, Mobile communication, Batteries
CITATION

A. Carette, M. A. Younes, G. Hecht, N. Moha and R. Rouvoy, "Investigating the energy impact of Android smells," 2017 IEEE 24th International Conference on Software Analysis, Evolution and Reengineering (SANER), Klagenfurt, Austria, 2017, pp. 115-126.
doi:10.1109/SANER.2017.7884614
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