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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Chapter 20. Drawing Graphics
This entire chapter will be about the Android Canvas class and some related classes, such as Paint, Color, and Bitmap. When combined, these classes bring great power when it comes to drawing on the screen. Sometimes, the default UI provided by the Android API isn't what we need. If we want to make a drawing app, draw graphs, or perhaps make a game, we need to take control of every pixel that the Android device has to offer.
In this chapter, we will cover the following topics:
- Gain an understanding of the
Canvasclass and some related classes - Write a
Canvas-based demo app - Look at the Android coordinate system so that we know where to do our drawing
- Learn about drawing and manipulating bitmap graphics
- Write a bitmap graphics-based ...
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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.