简单五子棋

五子棋的的制作主要是练习自定义View，看慕课网上的视屏做了个简单的五子棋。----------欢迎指出问题

自定义View（主要是对棋盘的绘制，设置点击事件绘制棋子）

先在onMeasure（）方法里获得设置自定义view的宽高，在onSizeChanged（）中获得有效宽度并设置棋子大小使棋子适应棋盘，通过设置棋盘的行数MAX_LINE与有效宽度获得行高，在onDraw()方法里通过画笔绘制棋盘,每次重绘时判断是否玩家胜利，在onTouchEvent()方法中设置点击事件通过记录在棋盘上绘制棋子，设置自定义方法startGame()清空棋子重新开始游戏。

<span style="font-size:18px;">public class MyView extends View {    private int mWidth;    private double mLineHeight;    private int MAX_LINE=10;    private Paint paint=new Paint();    private boolean gameOver=false;    private Bitmap mWhite;    private Bitmap mBlack;    private Boolean isWhite=true;    private List<Point> mWhiteList=new ArrayList<Point>();    private List<Point> mBlackList=new ArrayList<Point>();    public MyView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public MyView(Context context) {        super(context);        init();    }    /**     * 设置行列数     * @param MAX_LINE     */    public void setMAX_LINE(int MAX_LINE){        this.MAX_LINE=MAX_LINE;    }    /**     * 初始化画笔及棋子     */    private void init() {        paint.setColor(Color.WHITE);        paint.setAntiAlias(true);        paint.setDither(true);        paint.setStyle(Paint.Style.STROKE);        mWhite= BitmapFactory.decodeResource(getResources(),R.drawable.stone_w2);        mBlack= BitmapFactory.decodeResource(getResources(),R.drawable.stone_b1);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int widthSize=MeasureSpec.getSize(widthMeasureSpec);        int widthMode=MeasureSpec.getMode(widthMeasureSpec);        int heightSize=MeasureSpec.getSize(heightMeasureSpec);        int heightMode=MeasureSpec.getMode(heightMeasureSpec);        int width=Math.min(widthSize,heightSize);        if(widthMode==MeasureSpec.UNSPECIFIED){            width=heightSize;        }        else if(heightMode==MeasureSpec.UNSPECIFIED){            width=widthSize;        }        setMeasuredDimension(width,width);    }    @Override    protected void onSizeChanged(int w, int h, int oldw, int oldh) {        super.onSizeChanged(w, h, oldw, oldh);        mWidth=w;        mLineHeight=mWidth*1.0/MAX_LINE;        int pieceWidth= (int) (mLineHeight*3.0/4);        mWhite=Bitmap.createScaledBitmap(mWhite,pieceWidth,pieceWidth,false);        mBlack=Bitmap.createScaledBitmap(mBlack,pieceWidth,pieceWidth,false);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        if(gameOver) return false;        int action=event.getAction();        if(action==MotionEvent.ACTION_UP){            int x= (int) event.getX();            int y= (int) event.getY();            Point p=getPoint(x,y);            if(mWhiteList.contains(p)||mBlackList.contains(p)){                return false;            }            if(isWhite){                mWhiteList.add(p);            }            else{                mBlackList.add(p);            }            isWhite=!isWhite;        }        invalidate();        return true;    }    private Point getPoint(int x, int y) {        return new Point((int)(x/mLineHeight),(int)(y/mLineHeight));    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        drawBoard(canvas);        drawPieces(canvas);        if(IsWin.isWin(mWhiteList)){            Toast.makeText(getContext(),"White Win",Toast.LENGTH_SHORT).show();            gameOver=true;        }        if(IsWin.isWin(mBlackList)){            Toast.makeText(getContext(),"Black Win",Toast.LENGTH_SHORT).show();            gameOver=true;        }    }    /**     * 绘制已有棋子     * @param canvas     */    private void drawPieces(Canvas canvas) {        for(int i=0;i<mWhiteList.size();i++){            Point p=mWhiteList.get(i);            canvas.drawBitmap( mWhite,(float) ((p.x+(1-3.0/4)/2)*mLineHeight),(float) ((p.y+(1-3.0/4)/2)*mLineHeight),null);        }        for(int i=0;i<mBlackList.size();i++){            Point p=mBlackList.get(i);            canvas.drawBitmap( mBlack,(float) ((p.x+(1-3.0/4)/2)*mLineHeight),(float) ((p.y+(1-3.0/4)/2)*mLineHeight),null);        }    }    /**     * 绘制棋盘     * @param canvas     */    private void drawBoard(Canvas canvas) {        int w=mWidth;        double lineHeight=mLineHeight;        for(int i=0;i<MAX_LINE;i++){            int startX=(int)(lineHeight/2);            int endX=(int)(w-lineHeight/2);            int  y=(int)((0.5+i)*lineHeight);            canvas.drawLine(startX,y,endX,y,paint);            canvas.drawLine(y,startX,y,endX,paint);        }    }    /**     * 使用List的removeAll(Collection collection)方法移除mWhiteList和mBlackList所有元素,然后完成重绘     * (removeAll(Collection collection)方法意思为移除List中collection中的所有相同元素--所以我们把他     * 自身放入后就是移除该List中的所有元素了)     */    protected void startGame(){        mWhiteList.removeAll(mWhiteList);        mBlackList.removeAll(mBlackList);        gameOver=false;        invalidate();    }}</span>

<span style="font-size:18px;"><strong></strong></span>

<span style="font-size:18px;"><strong>activity代码</strong></span>

<span style="font-size:18px;"></span><pre name="code" class="java">public class MainActivity extends AppCompatActivity {    private Button restart;    private MyView borad;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        blind();        restartLinstener();    }    private void blind(){        restart=(Button)findViewById(R.id.restart);        borad=(MyView)findViewById(R.id.borad);    }

    /**

     <span style="font-family: Arial, Helvetica, sans-serif;">*调用View里的方法清空棋盘并重绘</span>

<span style="font-family: Arial, Helvetica, sans-serif;">        */</span>

    private void restartLinstener(){        restart.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                borad.startGame();            }        });    }}

判断是否胜利类(传入所有棋子位置，主要判断四个方向上是否存在五个连续的棋子，主要算法思想--判断每个棋子在一方向上的连续棋子数是否够5个)

<span style="font-size:18px;"></span><pre name="code" class="java">public class IsWin {    public static boolean isWin(List<Point> list){        for(int i=0;i<list.size();i++){            if(isCenterWin(list.get(i).x,list.get(i).y,list)){                return true;            }        }        for(int i=0;i<list.size();i++){            if(isVertialWin(list.get(i).x,list.get(i).y,list)){                return true;            }        }        for(int i=0;i<list.size();i++){            if(isRightWin(list.get(i).x,list.get(i).y,list)){                return true;            }        }        for(int i=0;i<list.size();i++){            if(isLeftWin(list.get(i).x,list.get(i).y,list)){                return true;            }        }        return false;    }    public static boolean isCenterWin(int x,int y,List<Point> list){        int count=1;        for(int i=1;i<5;i++){            if(list.contains(new Point(x+i,y))){                count++;            }            else{                break;            }        }        for(int i=1;i<5;i++){            if(list.contains(new Point(x-i,y))){                count++;            }            else{                break;            }        }        if(count==5){            return true;        }        return false;    }    public static boolean isVertialWin(int x,int y,List<Point> list){        int count=1;        for(int i=1;i<5;i++){            if(list.contains(new Point(x,y+i))){                count++;            }            else{                break;            }        }        for(int i=1;i<5;i++){            if(list.contains(new Point(x,y-i))){                count++;            }            else{                break;            }        }        if(count==5){            return true;        }        return false;    }    public static boolean isRightWin(int x,int y,List<Point> list){        int count=1;        for(int i=1;i<5;i++){            if(list.contains(new Point(x-i,y+i))){                count++;            }            else{                break;            }        }        for(int i=1;i<5;i++){            if(list.contains(new Point(x+i,y-i))){                count++;            }            else{                break;            }        }        if(count==5){            return true;        }        return false;    }    public static boolean isLeftWin(int x,int y,List<Point> list){        int count=1;        for(int i=1;i<5;i++){            if(list.contains(new Point(x+i,y+i))){                count++;            }            else{                break;            }        }        for(int i=1;i<5;i++){            if(list.contains(new Point(x-i,y-i))){                count++;            }            else{                break;            }        }        if(count==5){            return true;        }        return false;    }}

五子棋源码