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 – using the temperature sensor


In this section, we will get the ambient temperature from the phone temperature sensor and will show it in the foreground activity. Before accessing the value for ambient temperature, we will also check the availability of the temperature sensor on the device.

  1. We created a TemperatureActivity and implemented it with the SensorEventListener interface so that it receives the ambient temperature values. We are also checking if the ambient temperature is available on the device and are maintaining the availability state using the isSensorPresent Boolean variable. If the temperature sensor is not present, then we show the relevant message using  TextView. The following code snippet shows the necessary steps:

            public class TemperatureActivity extends Activity 
            implements SensorEventListener{ 
     
              private SensorManager mSensorManager; 
              private Sensor mSensor; 
              private boolean isSensorPresent...