Android SurfaceView實現人物動畫

經常看到別人的游戲中有人物跑動的效果，對這個東西很好奇，剛好群裡上傳了“忍者突襲”的代碼，我看了裡面的代碼，但對畫人物那段還是沒咋弄，所以自己寫一個測試程序，程序中使用到的圖片資源是來自“忍者突襲”的代碼，真心的感謝寫“忍者突襲”代碼的人～～

人物角色使用的圖片如下：

在畫人物角色時會對這張圖片進行剪切，使用的函數是

mCanvas.clipRect(mClipRect);

繪制人物角色的思想是使用mCanvas.clipRect(mClipRect);函數來設置畫布顯示的位置及大小,假設為(presentX，presentY，presentX + width/10, presentY + height)(presentX和presentY為現在圖片的位置，width和height為圖片的寬度和高度)，然後使用mCanvas.drawBitmap來繪制圖片，第一次繪制圖片的位置是(presentX，presentY)，然後將繪制圖片的位置修改為(presentX - width / 10, presentY),第二次設置的畫布顯示的位置仍然是presentX，presentY，presentX + width/10, presentY + height，繪制圖片的位置是(presentX - width / 10, presentY)，而第二張圖片的位置剛好是presentX，presentY，所以顯示的是第二張圖片，依次類推的實現其它圖片的顯示。

實例代碼如下：

1. package com.example.runmanenvironmenttest;
3. import Android.content.Context;
4. import android.graphics.Bitmap;
5. import android.graphics.BitmapFactory;
6. import android.graphics.Canvas;
7. import android.graphics.Color;
8. import android.graphics.Paint;
9. import android.graphics.Rect;
10. import android.util.AttributeSet;
11. import android.view.SurfaceHolder;
12. import android.view.SurfaceView;
14. public class MyView extends SurfaceView implements SurfaceHolder.Callback, Runnable{
16. private SurfaceHolder holder;
17. private Canvas mCanvas;
19. private Bitmap mBg1;
21. private Bitmap mPlay1;
23. private int mWidth;
24. private int mHeight;
26. private Paint mPaint;
28. private String tag = "xiao";
30. private BitmapFactory.Options ops;
31. private Rect mRect;
32. private Rect mClipRect;
33. private int mPosition = 20;
34. private int mPicPosition = 0;
35. private int mStep = 5;
36. private int mBamHeight = 600;
38. public MyView(Context context, AttributeSet attrs) {
39. super(context, attrs);
40. // TODO Auto-generated constructor stub
41. holder = this.getHolder();
42. holder.addCallback(this);
43. mPaint = new Paint();
44. mPaint.setColor(Color.YELLOW);
46. ops = new BitmapFactory.Options();
47. mBg1 = BitmapFactory.decodeResource(this.getResources(),
48. R.drawable.bg1, ops);
50. mPlay1 = BitmapFactory.decodeResource(getResources(), R.drawable.dartman, ops);
51. }
53. @Override
54. public void surfaceChanged(SurfaceHolder holder, int format, int width,
55. int height) {
56. // TODO Auto-generated method stub
57. mWidth = width;
58. mHeight = height;
59. mRect = new Rect(0, 0, mWidth, mHeight);
61. new Thread(this).start();
62. }
64. @Override
65. public void surfaceCreated(SurfaceHolder holder) {
66. // TODO Auto-generated method stub
68. }
70. @Override
71. public void surfaceDestroyed(SurfaceHolder holder) {
72. // TODO Auto-generated method stub
74. }
76. @Override
77. public void run() {
78. // TODO Auto-generated method stub
79. //myDraw();
80. while(true){
81. try {
82. mClipRect = new Rect(mPosition * mStep + mPlay1.getWidth() / 10, mBamHeight,mPosition * mStep + 2 * mPlay1.getWidth() / 10, mBamHeight - mPlay1.getHeight());
83. mCanvas = holder.lockCanvas();
84. if (mCanvas != null) {
85. mCanvas.drawBitmap(mBg1, null,mRect, mPaint);
87. mCanvas.save();
88. mCanvas.clipRect(mClipRect);
89. mCanvas.drawBitmap(mPlay1, mPlay1.getWidth() / 10 + mPosition * mStep - mPicPosition * mPlay1.getWidth() / 10, mBamHeight - mPlay1.getHeight(), mPaint);
90. mCanvas.restore();
91. mPicPosition++;
92. if(mPosition * mStep > mWidth){
93. mPosition = 0;
94. }
95. if(mPicPosition > 9){
96. mPicPosition = 0;
97. }
98. }
100. } catch (Exception e) {
101. e.printStackTrace();
102. } finally {
103. if (mCanvas != null) {
104. holder.unlockCanvasAndPost(mCanvas);
105. }
106. }
107. try {
108. Thread.sleep(1000);
109. } catch (InterruptedException e) {
110. // TODO Auto-generated catch block
111. e.printStackTrace();
112. }
113. }
114. }
115. }

源代碼下載地址：

免費下載地址在 http://linux.linuxidc.com/

用戶名與密碼都是www.linuxidc.com

具體下載目錄在 /2012年資料/9月/13日/Android SurfaceView實現人物動畫