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Android 9 Development Cookbook

You're reading from   Android 9 Development Cookbook Over 100 recipes and solutions to solve the most common problems faced by Android developers

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781788991216
Length 464 pages
Edition 3rd Edition
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Author (1):
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Rick Boyer Rick Boyer
Author Profile Icon Rick Boyer
Rick Boyer
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Toc

Table of Contents (18) Chapters Close

Preface 1. Activities FREE CHAPTER 2. Layouts 3. Views, Widgets, and Styles 4. Menus and Action Mode 5. Fragments 6. Home Screen Widgets, Search, and the System UI 7. Data Storage 8. Alerts and Notifications 9. Using the Touchscreen and Sensors 10. Graphics and Animation 11. A First Look at OpenGL ES 12. Multimedia 13. Telephony, Networks, and the Web 14. Location and Using Geofencing 15. Getting Your App Ready for the Play Store 16. Getting Started with Kotlin 17. Other Books You May Enjoy

Changing layout properties during runtime

In Android development, it's generally the preferred practice to define the UI with XML and the application code in Java, keeping the user interface code separate from the application code. There are times where it is much easier or more efficient, to alter (or even build) the UI from the Java code. Fortunately, this is easily supported in Android.

In this recipe, we will obtain a reference to the LayoutParams object to change the margin during runtime.

Getting ready

Here, we will set up a simple layout with XML and use a LinearLayout.LayoutParams object to change the margins of a View during runtime.  Create a new project using with an Empty Activity called RuntimeProperties...

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