Android 绘制棋子

Question

我目前正在开发 android 版本的国际象棋，但我遇到了平局问题。我已经设置了一个 ChessboardView class 来扩展视图并使用另一个名为 Tile 的助手 class。问题是我所有的作品都被绘制在正确的位置（我的调试器显示当我点击瓷砖时我正在击中的是什么）但是所有的图像都显示为黑皇后（我认为这是最后一种情况在我的 switch 语句中被击中，因为当我摆脱它时，所有的棋子都会变成黑车）。这是相关代码：

ChessboardView.java:

protected void onDraw(final Canvas canvas){
    final int width = getWidth();
    final int height = getHeight();
    this.squareSize = Math.min(
            getSquareSizeWidth(width),
            getSquareSizeHeight(height)
    );
    getOrigins(width,height);
    for(int col = 0; col < NUM_RC; col++){
        for(int row = 0; row < NUM_RC; row++){
            final int xCoord = getXCoord(col);
            final int yCoord = getYCoord(row);
            final Rect tileRect = new Rect(xCoord,yCoord,xCoord+squareSize,yCoord+squareSize);
            String loc = getRowString(row) + getColumnString(col);
            String piece = Chessboard.getPieceAtLocation(loc);
            tiles[col][row].setTileRect(tileRect);
            tiles[col][row].draw(canvas,piece,getContext());
        }
    }
}

Tile.java

public void draw(Canvas canvas,String piece, Context c){
    canvas.drawRect(tileRect, tileColor);
    if(!piece.equals("  ") && !piece.equals("##")){
        Bitmap pieceBM = null;
        switch(piece) {
            case "wp": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.white_pawn);
            }
            case "wK": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.white_king);
            }
            case "wB": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.white_bishop);
            }
            case "wN": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.white_knight);
            }
            case "wR": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.white_rook);
            }
            case "wQ": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.white_queen);
            }
            case "bp": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.black_pawn);
            }
            case "bK": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.black_king);
            }
            case "bB": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.black_bishop);
            }
            case "bN": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.black_knight);
            }
            case "bR": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.black_rook);
            }
            case "bQ": {
                pieceBM = BitmapFactory.decodeResource(c.getResources(), R.drawable.black_queen);
            }
        }
        canvas.drawBitmap(pieceBM,null,tileRect,null);
    }
}

Answer 1

您需要在每个案例的末尾加上一个 break;。否则它倒下并执行下一个案例。

Android 绘制棋子

Android drawing chess pieces

java

android

bitmap

draw