April 2019
Beginner to intermediate
698 pages
15h 15m
English
Content preview from Android Programming with Kotlin for BeginnersBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using buttons and TextView widgets from our layout with a little help from interfaces
To follow along with this project, create a new Android Studio project, call it Kotlin Meet UI, and choose the Empty Activity template. You can find the code and the XML layout code in the Chapter12/Kotlin Meet UI folder.
First, let's build a simple UI by observing the following steps:
- In the editor window of Android Studio, switch to
activity_main.xmland make sure you are on the Design tab. - Delete the auto-generated
TextView, the one that reads "Hello world!". - Add a TextView widget to the top-center of the layout.
- Set its text property to
0, itsidproperty totxtValue, and itstextSizeto40sp. Pay careful attention to the case of theidvalue. It has an uppercase ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.