简单的贪吃蛇游戏

来源：互联网发布：中电科软件与硬件工资编辑：程序博客网时间：2024/04/28 01:39
效果图:
游戏中图片
游戏失败
部分源码：
SnackView
// 屏幕的高度和宽度    private int screenHeight;    private int screenWidth;    // 每个小格子的高度和宽度    private int eachHeight;    private int eachWidth;    private Snack snack;    private Food food;    private Timer timer = new Timer();    Handler handler = new Handler() {        public void handleMessage(android.os.Message msg) {            moveSnack();            invalidate();        }    };    public SnackView(Context context) {        super(context);        this.context = context;        // 获得屏幕的高和宽        DisplayMetrics metrics = new DisplayMetrics();        WindowManager windowManager = (WindowManager) context                .getSystemService(Context.WINDOW_SERVICE);        windowManager.getDefaultDisplay().getMetrics(metrics);        screenHeight = metrics.heightPixels;        screenWidth = metrics.widthPixels;        eachHeight = screenHeight / 32;        eachWidth = screenWidth / 20;        // 初始化图片        headBitmap = BitmapFactory.decodeResource(getResources(),                R.drawable.head);        bodyBitmap = BitmapFactory.decodeResource(getResources(),                R.drawable.body);        foodBitmap = BitmapFactory.decodeResource(getResources(),                R.drawable.food);        this.initSnack();        this.initFood();        gameRun();    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        Paint paint = new Paint();// 定义画笔        paint.setColor(Color.GRAY);// 设置画笔颜色        paint.setAntiAlias(true);// 去除锯齿        paint.setStyle(Style.STROKE);// 设置空心实心        paint.setTextSize(40);        drawLines(canvas, paint);        if(isCollide()){            canvas.drawText("Game Over!", screenWidth/4, screenHeight/3, paint);            timer.cancel();        }else{            this.drawSnack(canvas, paint);        }        boolean flag = IsRectCollision(snack.getHead().getPointX(), snack                .getHead().getPointY(), eachWidth, eachHeight,                food.getPointX(), food.getPointY(), eachWidth, eachHeight);        if (flag) {            food = null;            snack.getBodyList().add(new Body());            this.initFood();        } else {            this.drawFood(canvas, paint);        }    }    @Override    public boolean onTouchEvent(MotionEvent event) {        // TODO Auto-generated method stub        int x = (int) event.getX();        int y = (int) event.getY();        SnackDirection nowDir = snack.getSnackDirection();        int m = -800 * x + 800 * 480 - 480 * y;        int n = 800 * x - 480 * y;        if ((m > 0 && n > 0) && (nowDir != SnackDirection.DOWN)) {            snack.setSnackDirection(SnackDirection.UP);        } else if ((m > 0 && n < 0) && (nowDir != SnackDirection.RIGHT)) {            snack.setSnackDirection(SnackDirection.LEFT);        } else if ((m < 0 && n > 0) && (nowDir != SnackDirection.LEFT)) {            snack.setSnackDirection(SnackDirection.RIGHT);        } else if ((m < 0 && n < 0) && (nowDir != SnackDirection.UP)) {            snack.setSnackDirection(SnackDirection.DOWN);        }        return super.onTouchEvent(event);    }    public void gameRun() {        timer.scheduleAtFixedRate(new TimerTask() {            @Override            public void run() {                // TODO Auto-generated method stub                handler.obtainMessage().sendToTarget();            }        }, 100, 400);    }    /*     * 画网格线     */    public void drawLines(Canvas canvas, Paint paint) {        int startX = 0, startY = 0;        for (int i = 0; i < 100; i++) {            canvas.drawLine(0, startY, screenWidth, startY, paint);            startY = startY + eachHeight;        }        for (int i = 0; i < 100; i++) {            canvas.drawLine(startX, 0, startX, screenHeight, paint);            startX = startX + eachWidth;        }        canvas.drawLine(0, 0, screenWidth, screenHeight, paint);        canvas.drawLine(0, screenHeight, screenWidth, 0, paint);    }    // 初始化蛇    public void initSnack() {        List<Body> bodies = new ArrayList<Body>();        Head head = new Head(eachWidth * 2, eachHeight * 2, headBitmap);        Body body1 = new Body(eachWidth * 1, eachHeight * 2, bodyBitmap);        Body body2 = new Body(eachWidth * 0, eachHeight * 2, bodyBitmap);        bodies.add(body1);        bodies.add(body2);        snack = new Snack(head, bodies, SnackDirection.RIGHT);    }    // 画蛇    public void drawSnack(Canvas canvas, Paint paint) {        canvas.drawBitmap(headBitmap, snack.getHead().getPointX(), snack                .getHead().getPointY(), paint);        for (int i = 0; i < snack.getBodyList().size(); i++) {            canvas.drawBitmap(bodyBitmap, snack.getBodyList().get(i)                    .getPointX(), snack.getBodyList().get(i).getPointY(), paint);        }    }    // 改变蛇身的位置    public void changSnackPosition(int pointX, int pointY) {        for (int i = snack.getBodyList().size() - 1; i > 0; i--) {            snack.getBodyList().get(i)                    .setPointX(snack.getBodyList().get(i - 1).getPointX());            snack.getBodyList().get(i)                    .setPointY(snack.getBodyList().get(i - 1).getPointY());        }        snack.getBodyList().get(0).setPointX(snack.getHead().getPointX());        snack.getBodyList().get(0).setPointY(snack.getHead().getPointY());    }    // 移动蛇    public void moveSnack() {        int nowPointX = snack.getHead().getPointX();        int nowPointY = snack.getHead().getPointY();        if (snack.getSnackDirection() == SnackDirection.RIGHT) {            changSnackPosition(nowPointX, nowPointY);            if (nowPointX >= screenWidth - eachWidth) {                snack.getHead().setPointX(0);            } else {                snack.getHead().setPointX(nowPointX + eachWidth);            }        } else if (snack.getSnackDirection() == SnackDirection.DOWN) {            changSnackPosition(nowPointX, nowPointY);            if (nowPointY >= screenHeight - eachHeight) {                snack.getHead().setPointY(0);            } else {                snack.getHead().setPointY(nowPointY + eachHeight);            }        } else if (snack.getSnackDirection() == SnackDirection.LEFT) {            changSnackPosition(nowPointX, nowPointY);            if (nowPointX <= 0) {                snack.getHead().setPointX(screenWidth - eachWidth);            } else {                snack.getHead().setPointX(nowPointX - eachWidth);            }        } else if (snack.getSnackDirection() == SnackDirection.UP) {            changSnackPosition(nowPointX, nowPointY);            if (nowPointY <= 0) {                snack.getHead().setPointY(screenHeight - eachHeight);            } else {                snack.getHead().setPointY(nowPointY - eachHeight);            }        }    }    // 初始化food    public void initFood() {        int x = new Random().nextInt(20);        int y = new Random().nextInt(30);        food = new Food(eachWidth * x, eachHeight * y, foodBitmap);    }    // 在界面上画出Food    public void drawFood(Canvas canvas, Paint paint) {        if (food != null) {            canvas.drawBitmap(foodBitmap, food.getPointX(), food.getPointY(),                    paint);        }    }    /**     * 矩形碰撞检测 参数为x,y,width,height     *      * @param x1     *            第一个矩形的x     * @param y1     *            第一个矩形的y     * @param w1     *            第一个矩形的w     * @param h1     *            第一个矩形的h     * @param x2     *            第二个矩形的x     * @param y2     *            第二个矩形的y     * @param w2     *            第二个矩形的w     * @param h2     *            第二个矩形的h     * @return 是否碰撞     */    public boolean IsRectCollision(int x1, int y1, int w1, int h1, int x2,            int y2, int w2, int h2) {        if (x2 > x1 && x2 >= x1 + w1) {            return false;        } else if (x2 < x1 && x2 <= x1 - w2) {            return false;        } else if (y2 > y1 && y2 >= y1 + h1) {            return false;        } else if (y2 < y1 && y2 <= y1 - h2) {            return false;        } else {            return true;        }    }    //检测蛇头是否与蛇身碰撞    public boolean isCollide() {        boolean flag = false;        for (int i = 0; i < snack.getBodyList().size(); i++) {            flag = IsRectCollision(snack.getHead().getPointX(), snack.getHead()                    .getPointY(), eachWidth, eachHeight, snack.getBodyList()                    .get(i).getPointX(),                    snack.getBodyList().get(i).getPointY(), eachWidth,                    eachHeight);            if(flag){                break;            }        }        return flag;    }}
源码下载：android_snack.rar