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Android Application Development Cookbook

You're reading from   Android Application Development Cookbook Over 100 recipes to help you solve the most common problems faced by Android Developers today

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Product type Paperback
Published in Mar 2016
Publisher
ISBN-13 9781785886195
Length 428 pages
Edition 2nd Edition
Languages
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Authors (2):
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Rick Boyer Rick Boyer
Author Profile Icon Rick Boyer
Rick Boyer
Kyle Mew Kyle Mew
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Kyle Mew
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Toc

Table of Contents (17) Chapters Close

Preface 1. Activities FREE CHAPTER 2. Layouts 3. Views, Widgets, and Styles 4. Menus 5. Exploring Fragments, AppWidgets, and the System UI 6. Working with Data 7. Alerts and Notifications 8. Using the Touchscreen and Sensors 9. Graphics and Animation 10. A First Look at OpenGL ES 11. Multimedia 12. Telephony, Networks, and the Web 13. Getting Location and Using Geofencing 14. Getting your app ready for the Play Store 15. The Backend as a Service Options Index

Reading sensor data – using the Android Sensor Framework events


The previous recipe, Listing available sensors – an introduction to the Android Sensor Framework, provided an introduction to the Android Sensor Framework. Now we'll look at reading the sensor data using the SensorEventListener. The SensorEventListener interface only has two callbacks:

  • onSensorChanged()

  • onAccuracyChanged()

When the sensor has new data to report, it calls the onSensorChanged() with a SensorEvent object. This recipe will demonstrate reading the Light sensor, but since all the sensors use the same framework, it's very easy to adapt this example to any of the other sensors. (See the list of sensor types available in the previous recipe's introduction.)

Getting ready

Create a new project in Android Studio and call it: ReadingSensorData. Use the default Phone & Tablet options and select Empty Activity when prompted for the Activity Type.

How to do it...

We'll add a TextView to the activity layout to display the sensor...

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