/MySnake/src/edu/hhxy/android/snake/Snake.java

package edu.hhxy.android.snake;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class Snake extends Activity {    private SnakeView mSnakeView;    private static String ICICLE_KEY = "snake-view";    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.snake_layout);        mSnakeView = (SnakeView) findViewById(R.id.snake);        mSnakeView.setTextView((TextView) findViewById(R.id.text));        if (savedInstanceState == null) {            // We were just launched -- set up a new game            mSnakeView.setMode(SnakeView.READY);        } else {            // We are being restored            Bundle map = savedInstanceState.getBundle(ICICLE_KEY);            if (map != null) {                mSnakeView.restoreState(map);            } else {                mSnakeView.setMode(SnakeView.PAUSE);            }        }    }    @Override    protected void onPause() {        super.onPause();        // Pause the game        mSnakeView.setMode(SnakeView.PAUSE);    }    @Override    public void onSaveInstanceState(Bundle outState) {        // Store the game state        outState.putBundle(ICICLE_KEY, mSnakeView.saveState());    }}

/MySnake/src/edu/hhxy/android/snake/SnakeView.java

package edu.hhxy.android.snake;import java.util.ArrayList;import java.util.Random;import android.annotation.SuppressLint;import android.content.Context;import android.content.res.Resources;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.util.Log;import android.view.KeyEvent;import android.view.View;import android.widget.TextView;import edu.hhxy.android.utils.Coordinate;import edu.hhxy.android.utils.SnakeDataUtils;@SuppressLint("HandlerLeak")public class SnakeView extends TileView {    private SnakeDataUtils snakeDataUtils = new SnakeDataUtils();    private static final String TAG = "SnakeView";    // mMode一个变量表示，用于确定游戏是PAUSE、READY、RUNNING、LOSE    private int mMode = READY;    public static final int PAUSE = 0;    public static final int READY = 1;    public static final int RUNNING = 2;    public static final int LOSE = 3;    // mDirection 当前蛇头的方向，蛇头方向有NORTH、SOUTH、EAST、WEST    private int mDirection = NORTH;    private int mNextDirection = NORTH;    private static final int NORTH = 1;    private static final int SOUTH = 2;    private static final int EAST = 3;    private static final int WEST = 4;    // 什么颜色的苹果RED_STAR红、YELLOW_STAR黄、GREEN_STAR绿    private static final int RED_STAR = 1;    private static final int YELLOW_STAR = 2;    private static final int GREEN_STAR = 3;    // mScore:当前得分    private long mScore = 0;    // 刷新屏幕的时间    private long mMoveDelay = 600;    // 最后一次移动的时间，用now-mLastMove可知已经刷新了多长时间    private long mLastMove;    /**     * mStatusText: text shows to the user in some run states     */    private TextView mStatusText;    /**     * mSnakeTrail: 蛇链表 mAppleList: 苹果链表     */    private ArrayList
     
       mSnakeTrail = new ArrayList
      
       ();    private ArrayList
       
         mAppleList = new ArrayList
        
         ();    // 随机数产生类    private static final Random RNG = new Random();    // 线程，定时刷新屏幕    private RefreshHandler mRedrawHandler = new RefreshHandler();    class RefreshHandler extends Handler {        public void handleMessage(Message msg) {            SnakeView.this.update();            SnakeView.this.invalidate();        }        public void sleep(long delayMillis) {            this.removeMessages(0);            sendMessageDelayed(obtainMessage(0), delayMillis);        }    };    // 重写父类构造方法    public SnakeView(Context context, AttributeSet attrs) {        super(context, attrs);        initSnakeView();    }    public SnakeView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        initSnakeView();    }    // 初始化    private void initSnakeView() {        setFocusable(true);        Resources r = this.getContext().getResources();        // 初始化并加载图片        resetTiles(4);        loadTile(RED_STAR, r.getDrawable(R.drawable.redstar));        loadTile(YELLOW_STAR, r.getDrawable(R.drawable.yellowstar));        loadTile(GREEN_STAR, r.getDrawable(R.drawable.greenstar));    }    private void initNewGame() {        mSnakeTrail.clear();// 新游戏开始，清空list        mAppleList.clear();        // For now we're just going to load up a short default eastbound snake        // that's just turned north        mSnakeTrail.add(new Coordinate(7, 7));        mSnakeTrail.add(new Coordinate(6, 7));        mSnakeTrail.add(new Coordinate(5, 7));        mSnakeTrail.add(new Coordinate(4, 7));        mSnakeTrail.add(new Coordinate(3, 7));        mSnakeTrail.add(new Coordinate(2, 7));        mNextDirection = NORTH;        // 添加两个苹果，准备被蛇吃        addRandomApple();        addRandomApple();        mMoveDelay = 600;        mScore = 0;    }    // 保存下蛇和苹果的坐标，蛇的方向，分数，延迟时间等信息    public Bundle saveState() {        Bundle map = new Bundle();        map.putIntArray("mAppleList",                snakeDataUtils.coordArrayListToArray(mAppleList));        map.putInt("mDirection", Integer.valueOf(mDirection));        map.putInt("mNextDirection", Integer.valueOf(mNextDirection));        map.putLong("mMoveDelay", Long.valueOf(mMoveDelay));        map.putLong("mScore", Long.valueOf(mScore));        map.putIntArray("mSnakeTrail",                snakeDataUtils.coordArrayListToArray(mSnakeTrail));        return map;    }    // 存储数据    public void restoreState(Bundle icicle) {        setMode(PAUSE);        mAppleList = snakeDataUtils.coordArrayToArrayList(icicle                .getIntArray("mAppleList"));        mDirection = icicle.getInt("mDirection");        mNextDirection = icicle.getInt("mNextDirection");        mMoveDelay = icicle.getLong("mMoveDelay");        mScore = icicle.getLong("mScore");        mSnakeTrail = snakeDataUtils.coordArrayToArrayList(icicle                .getIntArray("mSnakeTrail"));    }    /*     * handles key events in the game. Update the direction our snake is     * traveling based on the DPAD. Ignore events that would cause the snake to     * immediately turn back on itself.     *      * (non-Javadoc)     *      * @see android.view.View#onKeyDown(int, android.os.KeyEvent)     */    @Override    public boolean onKeyDown(int keyCode, KeyEvent msg) {        if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {            if (mMode == READY | mMode == LOSE) {                /*                 * At the beginning of the game, or the end of a previous one,                 * we should start a new game.                 */                initNewGame();                setMode(RUNNING);                update();                return (true);            }            if (mMode == PAUSE) {                /*                 * If the game is merely paused, we should just continue where                 * we left off.                 */                setMode(RUNNING);                update();                return (true);            }            if (mDirection != SOUTH) {                mNextDirection = NORTH;            }            return (true);        }        if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {            if (mDirection != NORTH) {                mNextDirection = SOUTH;            }            return (true);        }        if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {            if (mDirection != EAST) {                mNextDirection = WEST;            }            return (true);        }        if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) {            if (mDirection != WEST) {                mNextDirection = EAST;            }            return (true);        }        return super.onKeyDown(keyCode, msg);    }    /**     * Sets the TextView that will be used to give information (such as "Game     * Over" to the user.     *      * @param newView     */    public void setTextView(TextView newView) {        mStatusText = newView;    }    /**     * Updates the current mode of the application (RUNNING or PAUSED or the     * like) as well as sets the visibility of textview for notification     *      * @param newMode     */    public void setMode(int newMode) {        int oldMode = mMode;        mMode = newMode;        if (newMode == RUNNING & oldMode != RUNNING) {            mStatusText.setVisibility(View.INVISIBLE);            update();            return;        }        Resources res = getContext().getResources();        CharSequence str = "";        if (newMode == PAUSE) {            str = res.getText(R.string.mode_pause);        }        if (newMode == READY) {            str = res.getText(R.string.mode_ready);        }        if (newMode == LOSE) {            str = res.getString(R.string.mode_lose_prefix) + mScore                    + res.getString(R.string.mode_lose_suffix);        }        mStatusText.setText(str);        mStatusText.setVisibility(View.VISIBLE);    }    // 添加一个随机的苹果    private void addRandomApple() {        Coordinate newCoord = null;        boolean found = false;        while (!found) {            // Choose a new location for our apple            int newX = 1 + RNG.nextInt(mXTileCount - 2);            int newY = 1 + RNG.nextInt(mYTileCount - 2);            newCoord = new Coordinate(newX, newY);            // 保证苹果不出现在蛇身上            boolean collision = false;            int snakelength = mSnakeTrail.size();            for (int index = 0; index < snakelength; index++) {                if (mSnakeTrail.get(index).equals(newCoord)) {                    collision = true;                }            }            // 如果出现两个苹果，保证苹果重复            int applelength = mAppleList.size();            for (int index = 0; index < applelength; index++) {                if (mAppleList.get(index).equals(newCoord)) {                    collision = true;                }            }            found = !collision;        }        if (newCoord == null) {            Log.e(TAG, "Somehow ended up with a null newCoord!");        }        mAppleList.add(newCoord);    }    // 更新信息    public void update() {        if (mMode == RUNNING) {            long now = System.currentTimeMillis();            if (now - mLastMove > mMoveDelay) {                clearTiles();                updateWalls();                updateSnake();                updateApples();                mLastMove = now;            }            mRedrawHandler.sleep(mMoveDelay);        }    }    /**     * 给mTileGrid赋值，标识墙     */    private void updateWalls() {        for (int x = 0; x < mXTileCount; x++) {            setTile(GREEN_STAR, x, 0);            setTile(GREEN_STAR, x, mYTileCount - 1);        }        for (int y = 1; y < mYTileCount - 1; y++) {            setTile(GREEN_STAR, 0, y);            setTile(GREEN_STAR, mXTileCount - 1, y);        }    }    /**     * 给mTileGrid赋值，标识苹果     */    private void updateApples() {        for (Coordinate c : mAppleList) {            setTile(YELLOW_STAR, c.x, c.y);        }    }    /*     * 更新蛇，因为蛇要吃苹果     */    private void updateSnake() {        boolean growSnake = false;        Coordinate head = mSnakeTrail.get(0);// 蛇头当前的位置        Coordinate newHead = new Coordinate(1, 1);// 新蛇头，因为一会会为其赋值，所以此处可以不初始化        mDirection = mNextDirection;// 当前蛇头的方向        switch (mDirection) {        case EAST: {            newHead = new Coordinate(head.x + 1, head.y);            break;        }        case WEST: {            newHead = new Coordinate(head.x - 1, head.y);            break;        }        case NORTH: {            newHead = new Coordinate(head.x, head.y - 1);            break;        }        case SOUTH: {            newHead = new Coordinate(head.x, head.y + 1);            break;        }        }        // 检测蛇是否撞墙        if ((newHead.x < 1) || (newHead.y < 1) || (newHead.x > mXTileCount - 2)                || (newHead.y > mYTileCount - 2)) {            setMode(LOSE);            return;        }        // 检测蛇是否撞自身        int snakelength = mSnakeTrail.size();        for (int snakeindex = 0; snakeindex < snakelength; snakeindex++) {            Coordinate c = mSnakeTrail.get(snakeindex);            if (c.equals(newHead)) {                setMode(LOSE);                return;            }        }        // 吃苹果，自身涨一截，屏幕刷新变快，也就是速度变快        int applecount = mAppleList.size();        for (int appleindex = 0; appleindex < applecount; appleindex++) {            Coordinate c = mAppleList.get(appleindex);            if (c.equals(newHead)) {                mAppleList.remove(c);                addRandomApple();                mScore++;                mMoveDelay *= 0.99;                growSnake = true;// growSnake表示蛇是否迟到苹果，判定是否自身增长            }        }        /*         * 蛇移动的过程其实就是把蛇尾放到蛇头前，然后去掉蛇尾，这期间，如果蛇吃了苹果，则蛇自身增长，否则自身不增长         */        mSnakeTrail.add(0, newHead);        // 如果蛇不需要增长，减去蛇尾即可，如果需要增长，则把增长放到蛇头，不减蛇尾        if (!growSnake) {            mSnakeTrail.remove(mSnakeTrail.size() - 1);        }        // 控制使第一个苹果颜色与蛇身不同        int index = 0;        for (Coordinate c : mSnakeTrail) {            if (index == 0) {                setTile(YELLOW_STAR, c.x, c.y);            } else {                setTile(RED_STAR, c.x, c.y);            }            index++;        }    }}
        
       
      
     

/MySnake/src/edu/hhxy/android/snake/TileView.java

package edu.hhxy.android.snake;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.view.View;/** * TileView:一个继承View的基类 */public class TileView extends View {    protected static int mTileSize;// 图片大小    protected static int mXTileCount;// 总的列数    protected static int mYTileCount;// 总的行数    private static int mXOffset;// x边距    private static int mYOffset;// y边距    private Bitmap[] mTileArray;// 图片数组    /**     * 二维数组,根据其值用来确定是否要画苹果，以及要画什么颜色的苹果     */    private int[][] mTileGrid;// 二维数组    private final Paint mPaint = new Paint();    /*     * 构造方法     */    public TileView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        TypedArray a = context.obtainStyledAttributes(attrs,                R.styleable.TileView);        mTileSize = a.getInt(R.styleable.TileView_tileSize, 12);        a.recycle();    }    public TileView(Context context, AttributeSet attrs) {        super(context, attrs);        TypedArray a = context.obtainStyledAttributes(attrs,                R.styleable.TileView);        mTileSize = a.getInt(R.styleable.TileView_tileSize, 12);        a.recycle();    }    @Override    protected void onSizeChanged(int w, int h, int oldw, int oldh) {        // w宽，h长        mXTileCount = (int) Math.floor(w / mTileSize);        mYTileCount = (int) Math.floor(h / mTileSize);        mXOffset = ((w - (mTileSize * mXTileCount)) / 2);        mYOffset = ((h - (mTileSize * mYTileCount)) / 2);        mTileGrid = new int[mXTileCount][mYTileCount];        clearTiles();    }    /**     * 初始化     */    public void resetTiles(int tilecount) {        mTileArray = new Bitmap[tilecount];    }    /**     * 加载图片，使mTitleArray[]表示不同的图片     */    public void loadTile(int key, Drawable tile) {        Bitmap bitmap = Bitmap.createBitmap(mTileSize, mTileSize,                Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bitmap);        tile.setBounds(0, 0, mTileSize, mTileSize);        tile.draw(canvas);        mTileArray[key] = bitmap;    }    /**     * 初始化mTitleGrid[][]     */    public void clearTiles() {        for (int x = 0; x < mXTileCount; x++) {            for (int y = 0; y < mYTileCount; y++) {                setTile(0, x, y);            }        }    }    /**     * 把某一位置的坐标置为tileindex，以确定mTitleGrid[][]处要画的图片     */    public void setTile(int tileindex, int x, int y) {        mTileGrid[x][y] = tileindex;    }    @Override    public void onDraw(Canvas canvas) {        super.onDraw(canvas);        for (int x = 0; x < mXTileCount; x += 1) {            for (int y = 0; y < mYTileCount; y += 1) {                if (mTileGrid[x][y] > 0) {                    canvas.drawBitmap(mTileArray[mTileGrid[x][y]], mXOffset + x                            * mTileSize, mYOffset + y * mTileSize, mPaint);                }            }        }    }}

/MySnake/src/edu/hhxy/android/utils/Coordinate.java

 

package edu.hhxy.android.utils;public class Coordinate {    /**     * Simple class containing two integer values and a comparison function.     * There's probably something I should use instead, but this was quick and     * easy to build.     *      */    public int x;    public int y;    public Coordinate(int newX, int newY) {        x = newX;        y = newY;    }    public boolean equals(Coordinate other) {        if (x == other.x && y == other.y) {            return true;        }        return false;    }    @Override    public String toString() {        return "Coordinate: [" + x + "," + y + "]";    }}

 

 

/MySnake/src/edu/hhxy/android/utils/SnakeDataUtils.java

package edu.hhxy.android.utils;import java.util.ArrayList;public class SnakeDataUtils {    /**     * 数据转换成以int [x1,y1,x2,y2,x3,y3...]的形式便于保存下蛇和苹果的坐标     */    public int[] coordArrayListToArray(ArrayList
     
       cvec) {        int count = cvec.size();        int[] rawArray = new int[count * 2];        for (int index = 0; index < count; index++) {            Coordinate c = cvec.get(index);            rawArray[2 * index] = c.x;            rawArray[2 * index + 1] = c.y;        }        return rawArray;    }    /**     * 数据从int [x1,y1,x2,y2,x3,y3...]恢复     */    public ArrayList
      
        coordArrayToArrayList(int[] rawArray) {        ArrayList
       
         coordArrayList = new ArrayList
        
         ();        int coordCount = rawArray.length;        for (int index = 0; index < coordCount; index += 2) {            Coordinate c = new Coordinate(rawArray[index], rawArray[index + 1]);            coordArrayList.add(c);        }        return coordArrayList;    }}