Android SurfaceView使用例子

Android SurfaceView使用例子：

做游戲一般用SurfaceView

1. package com.himi;
2. import android.content.Context;
3. import android.graphics.Canvas;
4. import android.graphics.Color;
5. import android.graphics.Paint;
6. import android.view.SurfaceHolder;
7. import android.view.SurfaceView;
8. import android.view.SurfaceHolder.Callback;
9. import android.view.animation.Animation;
10. /**
11. * @author Himi
12. */
13. public class MySurfaceView extends SurfaceView implements Callback, Runnable {// 備注1
14. private SurfaceHolder sfh;
15. private Thread th;
16. private Canvas canvas;
17. private Paint paint;
18. private int ScreenW, ScreenH;
19. public MySurfaceView(Context context) {
20. super(context);
21. th = new Thread(this);
22. sfh = this.getHolder();
23. sfh.addCallback(this); // 備注1
24. paint = new Paint();
25. paint.setAntiAlias(true);
26. paint.setColor(Color.RED);
27. this.setKeepScreenOn(true);// 保持屏幕常亮
28. }
29. @Override
30. public void startAnimation(Animation animation) {
31. super.startAnimation(animation);
32. }
33. public void surfaceCreated(SurfaceHolder holder) {
34. ScreenW = this.getWidth();// 備注2
35. ScreenH = this.getHeight();
36. th.start();
37. }
38. private void draw() {
39. try {
40. canvas = sfh.lockCanvas(); // 得到一個canvas實例
41. canvas.drawColor(Color.WHITE);// 刷屏
42. canvas.drawText("Himi", 100, 100, paint);// 畫文字文本
43. canvas.drawText("這就是簡單的一個游戲框架", 100, 130, paint);
44. sfh.unlockCanvasAndPost(canvas); // 將畫好的畫布提交
45. } catch (Exception ex) {
46. } finally { // 備注3
47. if (canvas != null)
48. sfh.unlockCanvasAndPost(canvas);
49. }
50. }
51. public void run() {
52. while (true) {
53. draw();
54. try {
55. Thread.sleep(100);
56. } catch (InterruptedException e) {
57. // TODO Auto-generated catch block
58. e.printStackTrace();
59. }
60. }
61. }
62. public void surfaceChanged(SurfaceHolder holder, int format, int width,
63. int height) {
64. }
65. public void surfaceDestroyed(SurfaceHolder holder) {
66. // TODO Auto-generated method stub
67. }
68. }