Chapter 20: Drawing Graphics
This entire chapter will be about the Android Canvas class and some related classes, including Paint, Color, and Bitmap. These classes combined bring great power when it comes to drawing to 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 create 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:
- Understanding
Canvasand related classes - Writing a
Canvas-based demo app - Looking at the Android coordinate system so we know where to do our drawing
- Learning about drawing and manipulating bitmaps
- Writing a bitmap-based demo app
Let's draw!
