最近學(xué)習(xí)了五子棋的課程，感覺挺不錯(cuò)。然后自己寫了個(gè)關(guān)于五子棋的android程序，從中還是能夠?qū)W習(xí)到很多東西的。現(xiàn)在我們開始今天五子棋程序的編寫歷程。
好了，我們現(xiàn)在開始一步步的構(gòu)建出項(xiàng)目來，首先是如下的項(xiàng)目結(jié)構(gòu)圖：
運(yùn)行的效果圖：
一些前期做準(zhǔn)備的代碼
1、 主活動(dòng)類MainActivity，在菜單中加入了再來一局的功能：
public class MainActivity extends AppCompatActivity { private ChessBoardView chessBoardView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); chessBoardView = (ChessBoardView) findViewById(R.id.boardView); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); // 再來一局 if (id == R.id.action_setting) { chessBoardView.start(); return true; } return super.onOptionsItemSelected(item); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return true; }}2、常量類便于維護(hù)管理：Constants
public class Constants { // 五子連珠 public final static int MAX_COUNT_IN_LINE = 5; // 棋盤的行數(shù) final static int MAX_LINE = 15; // 檢查的方向 final static int HORIZONTAL = 0; final static int VERTICAL = 1; final static int LEFT_DIAGONAL = 2; final static int RIGHT_DIAGONAL = 4;}3、activity_main.xml中增加了自定義棋盤的View：
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@mipmap/bg" tools:context="com.example.linux.mygobang.MainActivity"> <com.example.linux.mygobang.ChessBoardView android:id="@+id/boardView" android:layout_centerInParent="true" android:layout_width="match_parent" android:layout_height="match_parent" /></RelativeLayout>
4、menu_main.xml中定義再來一局的菜單：
<?xml version="1.0" encoding="utf-8"?><menu xmlns:tools="http://schemas.android.com/tools" xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/action_setting" android:title="再來一局" android:orderInCategory="100" android:showAsAction="never" tools:ignore="AppCompatResource" /></menu>
自定義棋盤的View
ChessBoardView類，是整個(gè)程序比較核心的部分。
1、初始化工作，程序中用到的變量也放在下面的代碼中：
// 棋盤的寬度，也是長(zhǎng)度private int mViewWidth;// 棋盤每格的長(zhǎng)度private float maxLineHeight;private Paint paint = new Paint();// 定義黑白棋子的Bitmapprivate Bitmap mwhitePiece, mblackPiece;private float ratioPieceOfLineHeight = 3 * 1.0f / 4;// 判斷當(dāng)前落下的棋子是否是白色的private boolean mIsWhite = true;// 記錄黑白棋子位置的列表private ArrayList<Point> mwhiteArray = new ArrayList<>();private ArrayList<Point> mblackArray = new ArrayList<>();// 游戲是否結(jié)束private boolean mIsGameOver;// 游戲結(jié)束，是否是白色方勝利private boolean mIsWhiteWinner;public ChessBoardView(Context context, AttributeSet attrs) { super(context, attrs); init();}private void init() { paint.setColor(0x88000000); paint.setAntiAlias(true); paint.setDither(true); paint.setStyle(Paint.Style.STROKE); mwhitePiece = BitmapFactory.decodeResource(getResources(), R.mipmap.stone_w2); mblackPiece = BitmapFactory.decodeResource(getResources(), R.mipmap.stone_b1);}2、onMeasure方法，測(cè)量View的大小，使View的長(zhǎng)寬一致。
@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSize = MeasureSpec.getSize(widthMeasureSpec); int widthModel = MeasureSpec.getMode(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); int heightModel = MeasureSpec.getMode(heightMeasureSpec); int width = Math.min(widthSize, heightSize); if (widthModel == MeasureSpec.UNSPECIFIED) { width = heightSize; } else if (heightModel == MeasureSpec.UNSPECIFIED) { width = widthSize; } setMeasuredDimension(width, width);} 2、onSizeChanged方法在布局的階段，如果View的大小發(fā)生改變，此方法得到調(diào)用。
@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mViewWidth = w; maxLineHeight = mViewWidth * 1.0f / Constants.MAX_LINE; int pieceWidth = (int) (maxLineHeight * ratioPieceOfLineHeight); mwhitePiece = Bitmap.createScaledBitmap(mwhitePiece, pieceWidth, pieceWidth, false); mblackPiece = Bitmap.createScaledBitmap(mblackPiece, pieceWidth, pieceWidth, false);} 4、onTouchEvent方法中處理我們下棋子的位置：
@Overridepublic boolean onTouchEvent(MotionEvent event) { if (mIsGameOver) { return false; } int action = event.getAction(); if (action == MotionEvent.ACTION_UP) { int x = (int) event.getX(); int y = (int) event.getY(); Point point = getValidPoint(x, y); if (mwhiteArray.contains(point) || mblackArray.contains(point)) { return false; } if (mIsWhite) { mwhiteArray.add(point); } else { mblackArray.add(point); } invalidate(); mIsWhite = !mIsWhite; } return true;} 5、在onDraw方法做棋盤的繪制工作：
@Overrideprotected void onDraw(Canvas canvas) { super.onDraw(canvas); // 繪制棋盤的網(wǎng)格 drawBoard(canvas); // 繪制棋盤的黑白棋子 drawPieces(canvas); // 檢查游戲是否結(jié)束 checkGameOver();}6、接下來，我們按上面的流程，一個(gè)個(gè)的做詳細(xì)的解釋：
繪制棋盤的網(wǎng)格：
// 繪制棋盤的網(wǎng)線private void drawBoard(Canvas canvas) { int w = mViewWidth; float lineHeight = maxLineHeight; for (int i = 0; i < Constants.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); }}繪制棋盤的黑白棋子：
// 根據(jù)黑白棋子的數(shù)組繪制棋子private void drawPieces(Canvas canvas) { for (int i = 0, n = mwhiteArray.size(); i < n; i++) { Point whitePoint = mwhiteArray.get(i); float left = (whitePoint.x + (1 - ratioPieceOfLineHeight) / 2) * maxLineHeight; float top = (whitePoint.y + (1 - ratioPieceOfLineHeight) / 2) * maxLineHeight; canvas.drawBitmap(mwhitePiece, left, top, null); } for (int i = 0, n = mblackArray.size(); i < n; i++) { Point blackPoint = mblackArray.get(i); float left = (blackPoint.x + (1 - ratioPieceOfLineHeight) / 2) * maxLineHeight; float top = (blackPoint.y + (1 - ratioPieceOfLineHeight) / 2) * maxLineHeight; canvas.drawBitmap(mblackPiece, left, top, null); }}檢查游戲是否已經(jīng)結(jié)束：
// 檢查游戲是否結(jié)束private void checkGameOver() { CheckWinner checkWinner = new CheckWinner(); boolean whiteWin = checkWinner.checkFiveInLineWinner(mwhiteArray); boolean blackWin = checkWinner.checkFiveInLineWinner(mblackArray); if (whiteWin || blackWin) { mIsGameOver = true; mIsWhiteWinner = whiteWin; String text = mIsWhiteWinner ? "白棋勝利" : "黑棋勝利"; Toast.makeText(getContext(), text, Toast.LENGTH_SHORT).show(); }}保存殘局并恢復(fù)棋局
1、 保存殘局，例如切換橫堅(jiān)屏?xí)r：
private static final String INSTANCE = "instance";private static final String INSTANCE_GAME_OVER = "instance_game_over";private static final String INSTANCE_WHITE_ARRAY = "instance_white_array";private static final String INSTANCE_BLACK_ARRAY = "instance_black_array";@Overrideprotected Parcelable onSaveInstanceState() { Bundle bundle = new Bundle(); bundle.putParcelable(INSTANCE, super.onSaveInstanceState()); bundle.putBoolean(INSTANCE_GAME_OVER, mIsGameOver); bundle.putParcelableArrayList(INSTANCE_BLACK_ARRAY, mblackArray); bundle.putParcelableArrayList(INSTANCE_WHITE_ARRAY, mwhiteArray); return bundle;}2、 從bundle中恢復(fù)棋局：
@Overrideprotected void onRestoreInstanceState(Parcelable state) { if (state instanceof Bundle) { Bundle bundle = (Bundle) state; mIsGameOver = bundle.getBoolean(INSTANCE_GAME_OVER); mwhiteArray = bundle.getParcelableArrayList(INSTANCE_WHITE_ARRAY); mblackArray = bundle.getParcelableArrayList(INSTANCE_BLACK_ARRAY); super.onRestoreInstanceState(bundle.getParcelable(INSTANCE)); return; } super.onRestoreInstanceState(state);} 3、 增加再來一局游戲的邏輯：
// 再來一局public void start() { mwhiteArray.clear(); mblackArray.clear(); mIsGameOver = false; mIsWhiteWinner = false; invalidate();}判斷游戲是否結(jié)束的算法
在CheckWinner中，對(duì)棋盤中的棋子做”米“字型的檢查是否五子連珠：
1、 check方法中，針對(duì)不同的方向，做判斷：
private boolean check(int x, int y, List<Point> points, int checkOri) { int count = 1; for (int i = 1; i < Constants.MAX_COUNT_IN_LINE; i++) { switch (checkOri) { case Constants.HORIZONTAL: point1 = new Point(x - i, y); break; case Constants.VERTICAL: point1 = new Point(x, y - i); break; case Constants.LEFT_DIAGONAL: point1 = new Point(x - i, y + i); break; case Constants.RIGHT_DIAGONAL: point1 = new Point(x + i, y + i); break; } if (points.contains(point1)) { count++; } else { break; } } for (int i = 1; i < Constants.MAX_COUNT_IN_LINE; i++) { switch (checkOri) { case Constants.HORIZONTAL: point2 = new Point(x + i, y); break; case Constants.VERTICAL: point2 = new Point(x, y + i); break; case Constants.LEFT_DIAGONAL: point2 = new Point(x + i, y - i); break; case Constants.RIGHT_DIAGONAL: point2 = new Point(x - i, y - i); break; } if (points.contains(point2)) { count++; } else { break; } } if (count == Constants.MAX_COUNT_IN_LINE) { return true; } return false;}2、 做四個(gè)方向檢查：
// 橫向判斷private boolean checkHorizontal(int x, int y, List<Point> points) { checkModel = Constants.HORIZONTAL; return check(x, y, points, checkModel);}// 豎向判斷private boolean checkVertical(int x, int y, List<Point> points) { checkModel = Constants.VERTICAL; return check(x, y, points, checkModel);}// 左斜判斷private boolean checkLeftDiagonal(int x, int y, List<Point> points) { checkModel = Constants.LEFT_DIAGONAL; return check(x, y, points, checkModel);}// 右斜判斷private boolean checkRighttDiagonal(int x, int y, List<Point> points) { checkModel = Constants.RIGHT_DIAGONAL; return check(x, y, points, checkModel);} 3、 做具體的判斷，是否游戲結(jié)束：
private Point point1, point2;private int checkModel = -1;public boolean checkFiveInLineWinner(List<Point> points) { for (Point point : points) { int x = point.x; int y = point.y; if (checkHorizontal(x, y, points)) { return true; } else if (checkVertical(x, y, points)) { return true; } else if (checkLeftDiagonal(x, y, points)) { return true; } else if (checkRighttDiagonal(x, y, points)) { return true; } } return false;}源碼下載：Android五子棋游戲程序
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家學(xué)習(xí)Android軟件編程有所幫助。
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