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Android 9 Development Cookbook

Android 9 Development Cookbook

By : Boyer
3.4 (9)
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Android 9 Development Cookbook

Android 9 Development Cookbook

3.4 (9)
By: Boyer

Overview of this book

The Android OS has the largest installation base of any operating system in the world. There has never been a better time to learn Android development to write your own applications, or to make your own contributions to the open source community! With this extensively updated cookbook, you'll find solutions for working with the user interfaces, multitouch gestures, location awareness, web services, and device features such as the phone, camera, and accelerometer. You also get useful steps on packaging your app for the Android Market. Each recipe provides a clear solution and sample code you can use in your project from the outset. Whether you are writing your first app or your hundredth, this is a book that you will come back to time and time again, with its many tips and tricks on the rich features of Android Pie.
Table of Contents (18 chapters)
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Listing available sensors – an introduction to the Android Sensor Framework


Android includes support for hardware sensors using the Android Sensor Framework. The framework includes the following classes and interfaces:

  • SensorManager
  • Sensor
  • SensorEventListener
  • SensorEvent

Most Android devices include hardware sensors, but they vary greatly between different manufacturers and models. If your application utilizes sensors, you have two choices:

  • Specify the sensor in the Android Manifest
  • Check for the sensor at runtime

To specify your application uses a sensor, include the <uses-feature> declaration in the Android Manifest. Here is an example requiring a compass to be available:

<uses-feature android:name="android.hardware.sensor.compass" android:required="true"/>

If your application utilizes the compass, but does not require it to function, you should set android:required="false" instead; otherwise your application will not be available to install from Google Play.

Sensors are grouped into...

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