android 贪吃蛇简易实现

其实关于贪吃蛇的代码在网上实在是一搜一大堆，我也是闲着无聊随便写写 有瑕疵  数组集合转换部分应该有更快的算法，蛇的长度计算其实设计时没考虑充分有多余代码 ，碰撞检测部分没写 大家自己发挥吧     直接上代码

/** * Created by Administrator on 2017/8/10. */public class SnakeView extends SurfaceView implements SurfaceHolder.Callback, Runnable {    private Paint mPaint;    private Thread mThread;    private SurfaceHolder mHolder;    private int screenWidth;    private int screenHeight;    private static MyLinkList list;    private int sX1;    private int sY1;    private int sX2;    private int sY2;    private int foodX;    private int foodY;    private int headX;    private int headY;    private int foodRadiu;    private void initView() {        screenWidth = getResources().getDisplayMetrics().widthPixels;        screenHeight = getResources().getDisplayMetrics().heightPixels;        mPaint = new Paint();        foodRadiu=10;        mPaint.setColor(Color.BLACK);        mPaint.setStrokeWidth(15);        list = new MyLinkList();        mHolder = this.getHolder();        mHolder.addCallback(this);        mThread = new Thread(this);        list.add(new CustomStructure(0, 30, 500, 30, Direction.RIGHT, 500, true, true, new LenghtListener() {            @Override            public void lengehCheanger(int lenght, CustomStructure customStructure) {                if (list.size() == 1) {                    customStructure.setPositionX1(customStructure.getPositionX1() + 1);                    customStructure.setPositionX2(customStructure.getPositionX2() + 1);                } else {                    customStructure.setPositionX1(customStructure.getPositionX1() + 1);                }            }        }));    }    private void snakeRun() {        list.get(0).setLenght(list.get(0).getLenght());    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                sX1 = list.get(list.size() - 1).getPositionX1();                sY1 = list.get(list.size() - 1).getPositionY1();                sX2 = list.get(list.size() - 1).getPositionX2();                sY2 = list.get(list.size() - 1).getPositionY2();                list.get(list.size() - 1).setStart(false);                if (event.getRawX() > sX1 && (list.get(list.size() - 1).getmDirection() == Direction.UP || list.get(list.size() - 1).getmDirection() == Direction.DOWN)) {                    if (list.get(list.size() - 1).getmDirection() == Direction.UP) {                        list.add(new CustomStructure(sX1, sY1, sX1, sY1, Direction.RIGHT, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionX1(customStructure.getPositionX1() + 1);                                    customStructure.setPositionX2(customStructure.getPositionX2() + 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionX1(customStructure.getPositionX1() + 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionX2(customStructure.getPositionX2() + 1);                                }                            }                        }));                    } else {                        list.add(new CustomStructure(sX2, sY2, sX2, sY2, Direction.RIGHT, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionX1(customStructure.getPositionX1() + 1);                                    customStructure.setPositionX2(customStructure.getPositionX2() + 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionX1(customStructure.getPositionX1() + 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionX2(customStructure.getPositionX2() + 1);                                }                            }                        }));                    }                } else if (event.getRawX() < sX1 && (list.get(list.size() - 1).getmDirection() == Direction.UP || list.get(list.size() - 1).getmDirection() == Direction.DOWN)) {                    if (list.get(list.size() - 1).getmDirection() == Direction.UP) {                        list.add(new CustomStructure(sX1, sY1, sX1, sY1, Direction.LEFT, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionX1(customStructure.getPositionX1() - 1);                                    customStructure.setPositionX2(customStructure.getPositionX2() - 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionX2(customStructure.getPositionX2() - 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionX1(customStructure.getPositionX1() - 1);                                }                            }                        }));                    } else {                        list.add(new CustomStructure(sX2, sY2, sX2, sY2, Direction.LEFT, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionX1(customStructure.getPositionX1() - 1);                                    customStructure.setPositionX2(customStructure.getPositionX2() - 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionX2(customStructure.getPositionX2() - 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionX1(customStructure.getPositionX1() - 1);                                }                            }                        }));                    }                } else if (event.getRawY() > sY1 && (list.get(list.size() - 1).getmDirection() == Direction.LEFT || list.get(list.size() - 1).getmDirection() == Direction.RIGHT)) {                    if (list.get(list.size() - 1).getmDirection() == Direction.LEFT) {                        list.add(new CustomStructure(sX1, sY1, sX1, sY1, Direction.DOWN, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionY1(customStructure.getPositionY1() + 1);                                    customStructure.setPositionY2(customStructure.getPositionY2() + 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionY1(customStructure.getPositionY1() + 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionY2(customStructure.getPositionY2() + 1);                                }                            }                        }));                    } else {                        list.add(new CustomStructure(sX2, sY2, sX2, sY2, Direction.DOWN, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionY1(customStructure.getPositionY1() + 1);                                    customStructure.setPositionY2(customStructure.getPositionY2() + 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionY1(customStructure.getPositionY1() + 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionY2(customStructure.getPositionY2() + 1);                                }                            }                        }));                    }                } else if (event.getRawY() < sY1 && (list.get(list.size() - 1).getmDirection() == Direction.LEFT || list.get(list.size() - 1).getmDirection() == Direction.RIGHT)) {                    if (list.get(list.size() - 1).getmDirection() == Direction.LEFT) {                        list.add(new CustomStructure(sX1, sY1, sX1, sY1, Direction.UP, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionY1(customStructure.getPositionY1() - 1);                                    customStructure.setPositionY2(customStructure.getPositionY2() - 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionY2(customStructure.getPositionY2() - 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionY1(customStructure.getPositionY1() - 1);                                }                            }                        }));                    } else {                        list.add(new CustomStructure(sX2, sY2, sX2, sY2, Direction.UP, 0, true, false, new LenghtListener() {                            @Override                            public void lengehCheanger(int lenght, CustomStructure customStructure) {                                if (list.size() == 1) {                                    customStructure.setPositionY1(customStructure.getPositionY1() - 1);                                    customStructure.setPositionY2(customStructure.getPositionY2() - 1);                                } else if (customStructure.isEnd()) {                                    customStructure.setPositionY2(customStructure.getPositionY2() - 1);                                } else if (customStructure.isStart()) {                                    customStructure.setPositionY1(customStructure.getPositionY1() - 1);                                }                            }                        }));                    }                }                break;        }        return true;    }    public SnakeView(Context context) {        super(context);        initView();    }    public SnakeView(Context context, AttributeSet attrs) {        super(context, attrs);        initView();    }    private void initFoodPosition(){        foodX = new Random().nextInt(screenWidth + 1);        foodY = new Random().nextInt(screenHeight + 1);    }    public SnakeView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initView();    }    @Override    public void surfaceCreated(SurfaceHolder holder) {        initFoodPosition();        mThread.start();    }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {    }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {        mThread.interrupt();    }    @Override    public void run() {        while (true) {            Canvas mCanvas = null;            try {                synchronized (mHolder) {                    mCanvas = mHolder.lockCanvas();                    mCanvas.drawColor(Color.WHITE);                    if (list.size() == 1) {                        list.get(0).setLenght(list.get(0).getLenght());                    } else {                        list.get(list.size() - 1).setLenght(list.get(list.size() - 1).getLenght() + 1);                        list.get(0).setLenght(list.get(0).getLenght() - 1);                        if (list.get(0).getLenght() == 0) {                            list.remove(0);                            list.get(0).setEnd(true);                        }                    }                    Log.e("snakasd", list.toString());                    mCanvas.drawLines(list.toFloatArray(), 0, list.size() * 4, mPaint);//                    mCanvas.drawCircle(foodX, foodY, foodRadiu, mPaint);                    Thread.sleep(10);                }            } catch (Exception e) {            } finally {                if (mCanvas != null) {                    mHolder.unlockCanvasAndPost(mCanvas);                }            }        }    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        int widthMode = MeasureSpec.getMode(widthMeasureSpec);        int widthSize = MeasureSpec.getSize(widthMeasureSpec);        int heightMode = MeasureSpec.getMode(heightMeasureSpec);        int heightSize = MeasureSpec.getSize(heightMeasureSpec);        int width;        int height;        if (widthMode == MeasureSpec.EXACTLY) {            width = widthSize;        } else {            int desired = getPaddingLeft() + screenWidth + getPaddingRight();            width = desired;        }        if (heightMode == MeasureSpec.EXACTLY) {            height = heightSize;        } else {            int desired = getPaddingTop() + screenHeight + getPaddingBottom();            height = desired;        }        setMeasuredDimension(width, height);    }    interface LenghtListener {        void lengehCheanger(int lenght, CustomStructure customStructure);    }    class CustomStructure {        private LenghtListener lenghtListener;        public int getPositionX1() {            return positionX1;        }        public void setPositionX1(int positionX1) {            this.positionX1 = positionX1;        }        public int getPositionY1() {            return positionY1;        }        public void setPositionY1(int positionY1) {            this.positionY1 = positionY1;        }        public int getPositionX2() {            return positionX2;        }        public void setPositionX2(int positionX2) {            this.positionX2 = positionX2;        }        public int getPositionY2() {            return positionY2;        }        public void setPositionY2(int positionY2) {            this.positionY2 = positionY2;        }        public Direction getmDirection() {            return mDirection;        }        public void setmDirection(Direction mDirection) {            this.mDirection = mDirection;        }        public int getLenght() {            return lenght;        }        public void setLenght(int lenght) {            this.lenght = lenght;            lenghtListener.lengehCheanger(lenght, CustomStructure.this);        }        private int positionX1;        private int positionY1;        private int positionX2;        private int positionY2;        private Direction mDirection;        private int lenght;        private boolean isEnd;        private boolean isStart;        public CustomStructure(int positionX1, int positionY1, int positionX2, int positionY2, Direction mDirection, int lenght, boolean isStart, boolean isEnd, LenghtListener lenghtListener) {            this.positionX1 = positionX1;            this.positionY1 = positionY1;            this.positionX2 = positionX2;            this.positionY2 = positionY2;            this.mDirection = mDirection;            this.lenght = lenght;            this.isEnd = isEnd;            this.isStart = isStart;            this.lenghtListener = lenghtListener;        }        public boolean isEnd() {            return isEnd;        }        public void setEnd(boolean end) {            isEnd = end;        }        public boolean isStart() {            return isStart;        }        public void setStart(boolean start) {            isStart = start;        }        @Override        public String toString() {            return "CustomStructure{" +                    "lenghtListener=" + lenghtListener +                    ", positionX1=" + positionX1 +                    ", positionY1=" + positionY1 +                    ", positionX2=" + positionX2 +                    ", positionY2=" + positionY2 +                    ", mDirection=" + mDirection +                    ", lenght=" + lenght +                    ", isEnd=" + isEnd +                    ", isStart=" + isStart +                    '}';        }    }    enum Direction {        UP, DOWN, LEFT, RIGHT    }    class MyLinkList extends LinkedList<CustomStructure> {        float a[];        public float[] toFloatArray() {            a = new float[this.size() * 4];            for (int i = 0; i < this.size(); i++) {                a[4 * i] = this.get(i).getPositionX1();                a[4 * i + 1] = this.get(i).getPositionY1();                a[4 * i + 2] = this.get(i).getPositionX2();                a[4 * i + 3] = this.get(i).getPositionY2();            }            return a;        }    }}