%A Dang Nhac Lu %A Thu Trang Nguyen %A Thi Thu Trang Ngo %A Thi Hau Nguyen %A Ha Nam Nguyen %J Advances in Information and Communication Technology %T Mobile Online Activity Recognition System Based on Smartphone Sensors %X In this paper, we propose an efficient and flexible framework for activity recognition based on smartphone sensors. We develop a mobile application that integrates data collection, training and recognition, feedback monitoring. This system allows user smartphones are randomly placed in any position and at any direction. In the proposed framework, a set of power based and frequency-based features is extracted from sensor data. Then, we deploy Random Forest, Naïve Bayes, K-Nearest Neighbor (KNN), Support Vector Ma-chine (SVM) classification algorithms for recognizing a set of user activities. Our framework dynamically takes into account real-time user feedbacks to increase the prediction accuracy. Our framework will be able to apply for intelligent mo-bile applications. A number of experiments were carried out to show the high ac-curacy of the proposed framework for detecting user activities when walking or driving a motorbike. %P 357-366 %B Advances in Information and Communication Technology %V 538 %D 2016 %R doi:10.1007/978-3-319-49073-1_39 %L SisLab1897