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Android 9 Development Cookbook - Third Edition

You're reading from  Android 9 Development Cookbook - Third Edition

Product type Book
Published in Oct 2018
Publisher Packt
ISBN-13 9781788991216
Pages 464 pages
Edition 3rd Edition
Languages
Author (1):
Rick Boyer Rick Boyer
Profile icon Rick Boyer

Table of Contents (24) Chapters

Title Page
Copyright and Credits
Dedication
About Packt
Contributors
Preface
Activities Layouts Views, Widgets, and Styles Menus and Action Mode Fragments Home Screen Widgets, Search, and the System UI Data Storage Alerts and Notifications Using the Touchscreen and Sensors Graphics and Animation A First Look at OpenGL ES Multimedia Telephony, Networks, and the Web Location and Using Geofencing Getting Your App Ready for the Play Store Getting Started with Kotlin Other Books You May Enjoy Index

Reading device orientation


Although the Android framework will automatically load new resources (such as the layout) upon orientation changes, there are times when you may wish to disable this behavior. If you wish to be notified of an orientation change instead of Android handling it automatically, add the following attribute to the Activity in the Android Manifest:

android:configChanges="keyboardHidden|orientation|screenSize" 

When any of the following configuration changes occur, the system will notify you through the onConfigurationChanged() method instead of handling it automatically:

  • keyboardHidden
  • orientation
  • screenSize

The onConfigurationChanged() signature is as follows:

onConfigurationChanged (Configuration newConfig) 

You'll find the new orientation in newConfig.orientation.

 

Note

Disabling the automatic configuration change (which causes the layout to be reloaded and state information to be reset) should not be used as a replacement for properly saving state information. Your application...

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