贪吃蛇Word文档格式.docx

1、如果用户在游戏期间离开游戏界面，游戏暂停；或者由于内存比较紧张，Android关闭游戏释放内存，那么当用户返回游戏界面的时候恢复到上次离开时的界面。三、源码解析详细解析下源代码，由于代码量不大，以注释的方式列出如下：1、Snake.javaview plaincopy to clipboardprint?1. /* 2. * Title: Snake 3. * Copyright: （C） 2007 The Android Open Source Project. Licensed under the Apache License, Version 2.0 （the License）4. *

2、author Gavin 标注 5. */ 6. package com.deaboway.snake;7. import android.app.Activity;8. import android.os.Bundle;9. import android.widget.TextView;10. /* 11. * Snake: a simple game that everyone can enjoy. 12. * 13. * This is an implementation of the classic Game Snake, in which you control a 14. * se

3、rpent roaming around the garden looking for apples. Be careful, though, 15. * because when you catch one, not only will you become longer, but youll move 16. * faster. Running into yourself or the walls will end the game. 17. * 18. */ 19. / 贪吃蛇： 经典游戏，在一个花园中找苹果吃，吃了苹果会变长，速度变快。碰到自己和墙就挂掉。20. public clas

4、s Snake extends Activity 21. private SnakeView mSnakeView;22. private static String ICICLE_KEY = snake-view;23. /* 24. * Called when Activity is first created. Turns off the title bar, sets up 25. * the content views, and fires up the SnakeView. 26. * 27. */ 28. / 在 activity 第一次创建时被调用 29. Override 3

5、0. public void onCreate（Bundle savedInstanceState） 31. super.onCreate（savedInstanceState）;32. setContentView（R.layout.snake_layout）;33. mSnakeView = （SnakeView） findViewById（R.id.snake）;34. mSnakeView.setTextView（TextView） findViewById（R.id.text）;35. / 检查存贮状态以确定是重新开始还是恢复状态 36. if （savedInstanceState

6、 = null） 37. / 存储状态为空，说明刚启动可以切换到准备状态 38. mSnakeView.setMode（SnakeView.READY）;39. else 40. / 已经保存过，那么就去恢复原有状态 41. Bundle map = savedInstanceState.getBundle（ICICLE_KEY）;42. if （map != null） 43. / 恢复状态 44. mSnakeView.restoreState（map）;45. else 46. / 设置状态为暂停 47. mSnakeView.setMode（SnakeView.PAUSE）;48. 4

7、9. 50. 51. / 暂停事件被触发时 52. Override 53. protected void onPause（） 54. super.onPause（）;55. / Pause the game along with the activity 56. mSnakeView.setMode（SnakeView.PAUSE）;57. 58. / 状态保存 59. Override 60. public void onSaveInstanceState（Bundle outState） 61. / 存储游戏状态到View里 62. outState.putBundle（ICICLE_K

8、EY, mSnakeView.saveState（）;63. 64. 2、SnakeView.java7. import java.util.ArrayList;8. import java.util.Random;9. import android.content.Context;10. import android.content.res.Resources;11. import android.os.Handler;12. import android.os.Message;13. import android.util.AttributeSet;14. import android.o

9、s.Bundle;15. import android.util.Log;16. import android.view.KeyEvent;17. import android.view.View;18. import android.widget.TextView;19. /* 20. * SnakeView: implementation of a simple game of Snake 21. * 22. * 23. */ 24. public class SnakeView extends TileView 25. private static final String TAG =

10、Deaboway26. /* 27. * Current mode of application: READY to run, RUNNING, or you have already 28. * lost. static final ints are used instead of an enum for performance 29. * reasons. 30. */ 31. / 游戏状态，默认值是准备状态 32. private int mMode = READY;33. / 游戏的四个状态 暂停 准备 运行 和 失败 34. public static final int PAUSE

11、 = 0;35. public static final int READY = 1;36. public static final int RUNNING = 2;37. public static final int LOSE = 3;38. / 游戏中蛇的前进方向，默认值北方 39. private int mDirection = NORTH;40. / 下一步的移动方向，默认值北方 41. private int mNextDirection = NORTH;42. / 游戏方向设定 北 南 东 西 43. private static final int NORTH = 1;44.

12、 private static final int SOUTH = 2;45. private static final int EAST = 3;46. private static final int WEST = 4;47. /* 48. * Labels for the drawables that will be loaded into the TileView class 49. */ 50. / 三种游戏元 51. private static final int RED_STAR = 1;52. private static final int YELLOW_STAR = 2;

13、53. private static final int GREEN_STAR = 3;54. /* 55. * mScore: used to track the number of apples captured mMoveDelay: number of 56. * milliseconds between snake movements. This will decrease as apples are 57. * captured. 58. */ 59. / 游戏得分 60. private long mScore = 0;61. / 移动延迟 62. private long mM

14、oveDelay = 600;63. /* 64. * mLastMove: tracks the absolute time when the snake last moved, and is 65. * used to determine if a move should be made based on mMoveDelay. 66. */ 67. / 最后一次移动时的毫秒时刻 68. private long mLastMove;69. /* 70. * mStatusText: text shows to the user in some run states 71. */ 72.

15、/ 显示游戏状态的文本组件 73. private TextView mStatusText;74. /* 75. * mSnakeTrail: a list of Coordinates that make up the snakes body 76. * mAppleList: the secret location of the juicy apples the snake craves. 77. */ 78. / 蛇身数组（数组以坐标对象为元素） 79. private ArrayList mSnakeTrail = new ArrayList（）;80. / 苹果数组（数组以坐标对象

16、为元素） 81. private ArrayList mAppleList = new ArrayList82. /* 83. * Everyone needs a little randomness in their life 84. */ 85. / 随机数 86. private static final Random RNG = new Random（）;87. /* 88. * Create a simple handler that we can use to cause animation to happen. We 89. * set ourselves as a target

17、 and we can use the sleep（） function to cause an 90. * update/invalidate to occur at a later date. 91. */ 92. / 创建一个Refresh Handler来产生动画： 通过sleep（）来实现 93. private RefreshHandler mRedrawHandler = new RefreshHandler（）;94. / 一个Handler 95. class RefreshHandler extends Handler 96. / 处理消息队列 97. Override 9

18、8. public void handleMessage（Message msg） 99. / 更新View对象 100. SnakeView.this.update（）;101. / 强制重绘 102. SnakeView.this.invalidate（）;103. 104. / 延迟发送消息 105. public void sleep（long delayMillis） 106. this.removeMessages（0）;107. sendMessageDelayed（obtainMessage（0）, delayMillis）;108. 109. ;110. /* 111. *

19、Constructs a SnakeView based on inflation from XML 112. * 113. * param context 114. * param attrs 115. */ 116. / 构造函数 117. public SnakeView（Context context, AttributeSet attrs） 118. super（context, attrs）;119. / 构造时初始化 120. initSnakeView（）;121. 122. public SnakeView（Context context, AttributeSet attr

20、s, int defStyle） 123. super（context, attrs, defStyle）;124. initSnakeView（）;125. 126. / 初始化 127. private void initSnakeView（） 128. / 可选焦点 129. setFocusable（true）;130. Resources r = this.getContext（）.getResources（）;131. / 设置贴片图片数组 132. resetTiles（4）;133. / 把三种图片存到Bitmap对象数组 134. loadTile（RED_STAR, r.g

21、etDrawable（R.drawable.redstar）;135. loadTile（YELLOW_STAR, r.getDrawable（R.drawable.yellowstar）;136. loadTile（GREEN_STAR, r.getDrawable（R.drawable.greenstar）;137. 138. / 开始新的游戏初始化 139. private void initNewGame（） 140. / 清空ArrayList列表 141. mSnakeTrail.clear（）;142. mAppleList.clear（）;143. / For now were

22、 just going to load up a short default eastbound snake 144. / thats just turned north 145. / 创建蛇身 146. mSnakeTrail.add（new Coordinate（7, 7）;147. mSnakeTrail.add（new Coordinate（6, 7）;148. mSnakeTrail.add（new Coordinate（5, 7）;149. mSnakeTrail.add（new Coordinate（4, 7）;150. mSnakeTrail.add（new Coordinat

23、e（3, 7）;151. mSnakeTrail.add（new Coordinate（2, 7）;152. / 新的方向 ：北方 153. mNextDirection = NORTH;154. / 2个随机位置的苹果 155. addRandomApple（）;156. addRandomApple（）;157. / 移动延迟 158. mMoveDelay = 600;159. / 初始得分0 160. mScore = 0;161. 3、TileView.java7. import android.content.Context;8. import android.content.re

24、s.TypedArray;9. import android.graphics.Bitmap;10. import android.graphics.Canvas;11. import android.graphics.Paint;12. import android.graphics.drawable.Drawable;14. import android.view.View;15. /* 16. * TileView: a View-variant designed for handling arrays of icons or other 17. * drawables. 18. * 19. */ 20. / View 变种，用来处理 一组 贴片 “icons”或其它可绘制的对象 21. public class TileView extends View 22. /* 23. * Parameters controlling the size of the tiles and their range within view. 24. * Width/Height are in pixels, and Drawables will be scaled to fit to these 25. * dimensions. X/Y Tile Counts are the