KREATION: Kotlin Framework for Self-Adaptive IoHT Applications

In recent years, we have observed an increased volume of proposals for Internet of Health Things (IoHT) applications in the literature. Developing this type of application takes work, as it involves a series of challenges, many of them related to the constant change in the context of these applications, such as challenges related to energy consumption, the type of network communication, and its latency. In this sense, the development of self-adaptive systems is an alternative that has been explored for these applications. Self-adaptive systems can adapt to changes in context automatically, changing their behavior. However, developing self-adaptive systems is not trivial since, unlike other systems, they must be designed to evolve and adapt their behavior at runtime continuously. In this sense, we propose a Kotlin framework for developing self-adaptive IoHT applications for Android mobile devices called KREATION. This framework was developed using the Model-View-Control architecture and incorporates the MAPE-K adaptation loop into its internal logic. It also presents mechanisms to help collect data from Android smartphone sensors and data from the Google Fit API, which allows you to obtain data collected from other Android devices, such as smart bands and smartwatches. We evaluated the framework using it to develop two proofs of concept demonstrating that it is functional and can help the development of self-adaptive IoHT applications.