自定义五子棋View代码

/**

• Created by malei on 2017/6/5.
  */

public class GameView extends View{

private static final int MAX_LINES = 10;  //画线数目
private final Context mContext;
private Paint mPaint;  //格子笔
private Paint mTextPaint; //提示字笔
private Paint mWinPaint;  //赢了
private int mWidth;  //组件当前宽度
private int mHeight; //组件当前高度
private int viewWidth;
private int viewHeight;
private int mGridPad;   //每个格子的宽度
private Bitmap mWhiteChess;  //白棋子
private Bitmap mBlackChess;  //黑棋子
private ArrayList<Point> mWhiteList = new ArrayList<>();//白棋子数据boo
private ArrayList<Point> mBlackList = new ArrayList<>();//黑棋子数据boo
private boolean isBlackStep;  //黑棋子走 true 是黑走
private boolean isGameOver;


public GameView(Context context) {
    this(context,null);
}

public GameView(Context context, AttributeSet attrs) {
    this(context, attrs,0);
}

public GameView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    mContext = context;
    init();
}


//悔棋
public void backOff(){
    if(isGameOver) return;
    if(!isBlackStep){
        isBlackStep = true;
        if(!mBlackList.isEmpty()){
            mBlackList.remove(mBlackList.size()-1);
        }
    }else {
        isBlackStep = false;
        if(!mWhiteList.isEmpty()){
            mWhiteList.remove(mWhiteList.size()-1);
        }
    }
    invalidate();
}

public void reStart(){
    mWhiteList.clear();
    mBlackList.clear();
    isGameOver = false;
    invalidate();
}

//初始化要画笔
private void init() {
    mPaint = new Paint();
    mPaint.setColor(Color.BLUE);
    mTextPaint = new Paint();
    mTextPaint.setColor(Color.RED);
    mTextPaint.setTextSize(20);
    mWinPaint = new Paint();
    mWinPaint.setColor(Color.RED);
    mWinPaint.setTextSize(100);
    mWhiteChess = BitmapFactory.decodeResource(getResources(), R.mipmap.white);
    mBlackChess = BitmapFactory.decodeResource(getResources(), R.mipmap.black);

}

//绘制组件
@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    LogUtils.i("onDraw");
    drawChessBoard(canvas);
    drawChesses(canvas);
    drawTipText(canvas); //绘制提示字
    checkGameResult(canvas);//游戏结束处理
}

private void drawTipText(Canvas canvas) {

    String text = "";
    if(isBlackStep){
        text = "黑棋走";
    }else{
        text = "白棋走";
    }
    canvas.drawText(text, mGridPad/4, mGridPad/2, mTextPaint);
}

//判断游戏结果
private void checkGameResult(Canvas canvas) {
    boolean isBlackWin = checkResult(mBlackList);
    boolean isWhiteWin = checkResult(mWhiteList);
    if(isBlackWin || isWhiteWin){
        isGameOver = true;
        if(isWhiteWin){
            canvas.drawText("白色赢了",mGridPad*2 , mGridPad*5, mWinPaint);;
        }else {
            canvas.drawText("黑色赢了",mGridPad*2 , mGridPad*5, mWinPaint);;
        }
    }
}

private boolean checkResult(ArrayList<Point> pointList) {
    for (Point p : pointList){
        int x = p.x;
        int y = p.y;
        //水平检测
        boolean win = checkHorizontal(x, y, pointList);
        if(win){
            return true;
        }
        //垂直检测
        win = checkVertical(x, y, pointList);
        if (win) {
            return true;
        }
        win = checkLeftSlant(x, y, pointList);
        if (win) {
            return true;
        }
        win = checkRightSlant(x, y, pointList);
        if (win) {
            return true;
        }
    }
    return false;

}


//绘制棋子
private void drawChesses(Canvas canvas) {
    //绘制白棋
    int wSize = mWhiteList.size();
    for(int i = 0; i < wSize; i++){
        Point wp = mWhiteList.get(i);
        LogUtils.i(wp.x+"");
        canvas.drawBitmap(mWhiteChess,
                wp.x * mGridPad - mWhiteChess.getHeight()/2,
                wp.y * mGridPad - mWhiteChess.getHeight()/2,
                null);
    }

    //绘制黑棋子
    int bSize = mBlackList.size();
    for(int i = 0; i < bSize; i++){
        Point wp = mBlackList.get(i);
        LogUtils.i(wp.x+"");
        canvas.drawBitmap(mBlackChess,
                wp.x * mGridPad - mBlackChess.getHeight()/2,
                wp.y * mGridPad - mBlackChess.getHeight()/2,
                null);
    }
}

//绘制棋盘（10*10网格）
private void drawChessBoard(Canvas canvas) {
    int startX=0,startY = 0,stopX=0,stopY =0;
    LogUtils.i("viewWidth="+viewWidth);
    for (int i = 0 ; i < MAX_LINES; i++){
        //绘制横线
        canvas.drawLine(0, startY, viewWidth, stopY, mPaint);
        startY = startY + mGridPad;
        stopY = stopY + mGridPad;

        //绘制竖线
        canvas.drawLine(startX, 0, stopX, viewWidth, mPaint);
        startX = startX + mGridPad;
        stopX = stopX + mGridPad;
    }
}

//View本身大小多少
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    LogUtils.i("onMeasure");
    //宽度设置
    int widthSize = MeasureSpec.getSize(widthMeasureSpec);//组件宽度大小
    int widthMode = MeasureSpec.getMode(widthMeasureSpec);//组件宽度测量模式
    if (widthMode == MeasureSpec.AT_MOST) {  //wrap_content 跟父组件关系密切
        viewWidth = widthSize;
    }else if(widthMode == MeasureSpec.EXACTLY){  //精确尺寸 fill_parent或者50dp
        viewWidth = widthSize;
    }else if(widthMode == MeasureSpec.UNSPECIFIED){ //基本不用
    }
    //高度设置
    int heightSize = MeasureSpec.getSize(heightMeasureSpec);//高度大小
    int heightMode = MeasureSpec.getMode(heightMeasureSpec);//高度测量模式
    if (heightMode == MeasureSpec.AT_MOST) {  //wrap_content 跟父组件关系密切
        viewHeight = heightSize;
    }else if(heightMode == MeasureSpec.EXACTLY){  //精确尺寸 fill_parent或者50dp
        viewHeight = heightSize;
    }else if(heightMode == MeasureSpec.UNSPECIFIED){ //基本不用
    }
    //返回小的值
    int width = Math.min(viewWidth, viewHeight);
    //设置大小
    setMeasuredDimension(width, width);
    mGridPad = width/10;
}



@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    LogUtils.i("onSizeChanged");
    LogUtils.i("width="+w+" height="+h);
    mWidth = w; //组件可用宽度
    mHeight = h; //组件可用宽度
}

@Override
public boolean onTouchEvent(MotionEvent event) {

    if(isGameOver){
        return false;
    }
    if(event.getAction() == MotionEvent.ACTION_UP){
        int x = (int) event.getX();
        int y = (int) event.getY();
        LogUtils.i("点击 x="+x+" y="+y);
        Point p = getValidPoint(x, y);
        if (mWhiteList.contains(p) || mBlackList.contains(p)) {
            LogUtils.i("已经被占位了");
            return false;
        }
        if(isBlackStep){ //是黑走
            mBlackList.add(p);
        }else{ //白走
            mWhiteList.add(p);
        }

        invalidate();
        isBlackStep = !isBlackStep;
    }

    return true;
}

private Point getValidPoint(int x, int y) {
    return new Point((int) (x / mGridPad), (int) (y / mGridPad));
}

private boolean checkRightSlant(int x, int y, List<Point> pointList) {
    int count = 1;
    for (int i = 1; i < LINE_MAX_NUMS; i++) {
        if (pointList.contains(new Point(x - i, y - i)) || pointList.contains(new Point(x + i, y + i))) {
            count++;
        } else {
            break;
        }
    }
    if (count == LINE_MAX_NUMS) {
        return true;
    }
    return false;
}


private boolean checkLeftSlant(int x, int y, List<Point> pointList) {
    int count = 1;
    for (int i = 1; i < LINE_MAX_NUMS; i++) {
        if (pointList.contains(new Point(x - i, y + i)) || pointList.contains(new Point(x + i, y - i))) {
            count++;
        } else {
            break;
        }
    }
    if (count == LINE_MAX_NUMS) {
        return true;
    }
    return false;
}

//垂直已经连成5个
private boolean checkVertical(int x, int y, ArrayList<Point> pointList) {
    int count = 1;
    for (int i = 1; i < LINE_MAX_NUMS; i++) {
        if (pointList.contains(new Point(x, y - i)) || pointList.contains(new Point(x, y + i))) {
            count++;
        } else {
            break;
        }
    }
    if (count == LINE_MAX_NUMS) {
        return true;
    }
    return false;
}

private final static int LINE_MAX_NUMS = 5;//同色五子成线表示结束
//横向已经连成5个
private boolean checkHorizontal(int x, int y, ArrayList<Point> pointList) {
    int count = 1;
    for (int i = 1; i < LINE_MAX_NUMS; i++) {
        //左边或者右边判断
        if(pointList.contains(new Point(x-i,y)) || pointList.contains(new Point(x+i,y))){
            count++;
        }else{
            break;
        }
        if(count == LINE_MAX_NUMS){
            return true;
        }
    }
    return false;
}

//保存界面数据（比如来电，李横竖屏切换等)


//以下几个常量是为了保存界面数据
private final static String GOBANG_INSTANCE = "gobang_instance";
private final static String GAME_OVER = "game_over";
private final static String WHITE_DATA = "white_data";
private final static String BLACK_DATA = "black_data";

//保存界面数据（比如来电，李横竖屏切换等)
@Override
protected Parcelable onSaveInstanceState() {
    Bundle bundle = new Bundle();
    bundle.putParcelable(GOBANG_INSTANCE, super.onSaveInstanceState());
    bundle.putBoolean(GAME_OVER, isGameOver);
    bundle.putParcelableArrayList(WHITE_DATA, mWhiteList);
    bundle.putParcelableArrayList(BLACK_DATA, mBlackList);
    return super.onSaveInstanceState();
}

/**
 * 取用保存的数据
 */
@Override
protected void onRestoreInstanceState(Parcelable state) {
    if (state instanceof Bundle) {
        Bundle bundle = (Bundle) state;
        isGameOver = bundle.getBoolean(GAME_OVER);
        mWhiteList = bundle.getParcelableArrayList(WHITE_DATA);
        mBlackList = bundle.getParcelableArrayList(BLACK_DATA);
        super.onRestoreInstanceState(bundle.getParcelable(GOBANG_INSTANCE));
    }
    super.onRestoreInstanceState(state);
}

}