Δημιουργία Android εφαρμογής για ανταλλαγή μπαταρίας
This project, was developed within the scope of the MSc Advanced Information Systems of the department of Informatics of University of Piraeus. The aim of it is the design and development of an android application, which will allow users to locate other users within a specific kilometer distance that are willing to offer them a way to charge their mobile phones. With the advance of technology and the increasing capabilities of mobile devices, a major issue for users of "smart" phones is quick battery discharge. In order to solve the aforementioned problem, we created an application that aims to bring users who can “exchange” close. The available charging options are a simple charger, a powerbag and innovative USB Type cable C, which is being supported by more and more mobile devices and, most importantly is bi-directional, so a device can either send or receive power. To achieve the above, we have created an application that has the form of a social network, where interaction between the users is supported. In particular, each user has their own profile and a contact list where they can select and view the profile of friends and send them a request for battery. If the aforementioned request is accepted, a chat starts between the two users. Moreover, a key feature of the application is google map, in which all users within a specific kilometer distance are displayed. The application was developed in Android Studio, with Restful Web service and MySQL database.