Book Image

Android Sensor Programming By Example

By : Varun Nagpal
Book Image

Android Sensor Programming By Example

By: Varun Nagpal

Overview of this book

Android phones available in today’s market have a wide variety of powerful and highly precise sensors. Interesting applications can be built with them such as a local weather app using weather sensors, analyzing risky driving behavior using motion sensors, a fitness tracker using step-counter sensors, and so on. Sensors in external devices such as Android Watch, Body Analyzer & Weight Machine, Running Speed Cell, and so on can also be connected and used from your Android app running on your phone. Moving further, this book will provide the skills required to use sensors in your Android applications. It will walk you through all the fundamentals of sensors and will provide a thorough understanding of the Android Sensor Framework. You will also get to learn how to write code for the supportive infrastructure such as background services, scheduled and long running background threads, and databases for saving sensor data. Additionally, you will learn how to connect and use sensors in external devices from your Android app using the Google Fit platform. By the end of the book, you will be well versed in the use of Android sensors and programming to build interactive applications.
Table of Contents (13 chapters)
Android Sensor Programming By Example
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Time for action – type of step (walking, jogging, and running) detection using the accelerometer sensor


This section is dedicated to the implementation of the type of step detection algorithm discussed in the previous section. Our implementation for the algorithm will consist of four major components of android: first is android service, which will stay in the background, second is a set of two threads using the  ScheduledExecutorService, and third is the activity to show the pedometer application data. The last component is the SQLite database to store the steps' information. The following is the high-level class diagram of the application; we will discuss each class in detail in their own sections. Now, let's explore the first component in detail:

  1. The first component of the algorithm is the StepsTrackerService service, which will remain in the background and provide a container for execution. Inside this service, we create the StepDetectorListener and AccelerometerListener classes and...