Penelitian ini melakukan rancang bangun aplikasi mobile portal akademik berbasiskan Android dengan metode Prototyping yang akan digunakan oleh mahasiswa sebagai media informasi akademik dan mata kuliah. Aplikasi dibangun dengan menggunakan Android SDK (Software Development Kit) serta membangun sebuah web service dengan arsitektur REST (Representational State Transfer) sebagai penghubung komunikasi antara aplikasi mobile dengan web server portal akademik menggunakan bahasa pemrograman PHP. Aplikasi akan mengakses web service yang mengambil informasi dari database web server dan mengirimkannya kepada aplikasi dalam format JSON (JavaScript Simple Object Notation). Aplikasi akan mengolah format data JSON dari web service dan menampilkannya pada User Interface Aplikasi. Dengan memanfaatkan fitur SQLite pada aplikasi, informasi akan dapat dilihat tanpa perlu perangkat terhubung dengan web server. Penelitian ini bertujuan untuk memudahkan serta mempercepat proses pencarian dan penerimaan informasi dari sistem portal akademik terkait sistem ini sebagai pusat informasi dan aktivitas para mahasiswa. Dengan memanfaatkan kelebihan sistem mobile dan fitur-fitur sistem operasi Android, proses penerimaan informasi oleh mahasiswa menjadi lebih efektif. Kata kunci: Android, Android SDK, JSON, Portal Akademik, Prototyping, REST, SQLite, Web Service.This research conducts designing and building Android-based academic portal mobile application using Prototyping method which will be used by college students as an academic and lecture information media. This research builds application using Android SDK (Software Development Kit) and also build a web service with REST (Representational State Transfer) architecture applied as a connector of communication between mobile application and academic portal web server using PHP programming language. This application will access web service that retrieves information stored in web server database and send it to the application in JSON (JavaScript Simple Object Notation) format. Application will process JSON format data from web service and display it into application user interface. By utilizing SQLite feature in this application, information will be able to be displayed without device necessarily connected to the web server. This research purpose is to make easy in searching and receiving information from academic portal system because this system as a central of information and activity of the students. By utilizing mobile system advantages and Android Operating System features, process of information searching and receiving by students will be more effective. Keywords: Android, Android SDK, Academic Portal, JSON, Prototyping, REST, SQLite, Web Service. Daftar Pustaka Bedyński, P. (2011). Andood – an Android application. Canalys. (2014, January 30). Android on 80% of smart phones shipped in 2013. Retrieved March 9, 2014, from Canalys: http://www.canalys.com/newsroom/android-80-smart-phones-shipped-2013 Deitel, P. J. (2013). Android How to Program. In P. J. Deitel, Android How to Program. United States of America: Prentice Hall. Eclipse Foundation. (n.d.). About the Eclipse Foundation. Retrieved 3 12, 2014, from Eclipse: https://www.eclipse.org/org/#history Fielding, R. T., & Taylor, R. N. (2002). Principled Design of the Modern. ACM Transactions on Internet Technology, Vol. 2, No. 2, 115-150. Gaddis, T. (2011). Starting Out With Java: Early Objects, 4th Edition. In T. Gaddis, Starting Out With Java: Early Objects, 4th Edition. United States: Pearson Education. http://json.org. (n.d.). Retrieved November 14, 2014, from JSON Official Website: http://json.org http://www.slimframework.com. (n.d.). Retrieved November 14, 2014, from Slim Framework Official Website: http://www.slimframework.com Njunjic, I. (2012). Development Techniques for Android Platform Mobile Device Application. Master's Theses, and Doctoral Dissertations, and Graduate Capstone Projects. Nosrati, M., Karimi, R., & Hasanvand, H. A. (2012). Mobile Computing: Principles, Devices and Operating Systems. World Applied Programming, Vol (2), Issue (7), 399-408. Nuari, N. (2013). Perancangan Aplikasi Layanan Mobile Informasi Administrasi Akademik Berbasis Android Menggunakan Webservice. Richardson, L., & Ruby, S. (2007). RESTful Web Service. United States: O'Reilly Media. Sabale, R. G., & Dani. (2012). Comparative Study of Prototype Model For Software . IOSR Journal of Engineering (IOSRJEN), 21-24 . Savoia, A. (2001). Web Page Response Time 101. STQE July/August. Tanenbaum, A. S., & Steen, M. V. (2007). Distributed System: Principles and Paradigms. United States: Pearson Education. Yoon, H.-J. (2012). A Study on the Performance of Android . International Journal on Computer Science and Engineering Vol. 4 No.04, 532-537