Tham khảo tài liệu 'lập trình android (phần 6)', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Graphics and animation This chapter covers Drawing graphics in Android Applying the basics of OpenGL ES Animating One of the main features ofAndroid that you should have picked up on by now is how much easier it is to develop Android applications than mobile application platforms. This really stands out in the creation of visually appealing Uls and metaphors but there is a limit of what can be done with typical Android UI elements such as those discussed in chapter 3 . In this chapter we are going to look at how to create graphics using Android s Graphic API develop animations and look at Android s support for the OpenGL standard to see examples of what can be done with Android s graphics platform go to http Android ADC . If you have ever worked with graphics in Java you will most likely find the Graphics API and how graphics work in Android familiar. Drawing graphics in Android In this section we are going to be looking at Android s graphical capabilities as well as examples of how to make simple 2D shapes. We will be making use of 226 Download at Licensed to Deborah Christiansen pedbro@ Drawing graphics in Android 227 the package see http android reference android graphics which provides all the low-level classes and tooling needed to create graphics. The graphics package supports such things as bitmaps which hold pixels canvas what your draw calls draw on primitives such as rectangles or text and paint which you use to add color and styling . To demonstrate the basics of drawing a shape let s look at a simple example in listing where we will draw a rectangle. Listing Shape example package public class SimpleShape extends Activity Override protected void onCreate Bundle icicle icicle setContentView new SimpleView this B Create View private static class SimpleView extends View ----1 private .
