Question

我有两种颜料，并将颜色设置为不同的颜色。问题是第二种涂料会覆盖第一种涂料。

这是我的代码：

public class Score {
    static Globals g = Globals.getInstance();
    private Rect bounds = new Rect();
    private Paint paintBG = new Paint();
    private Paint paintFG = new Paint();
    private int mid;

    public Score(Paint paint) {
        this.paintBG = paint;
        this.paintFG = paint;

        // PROBLEME 
        paintBG.setColor(Color.GRAY);
        paintFG.setColor(Color.WHITE); // <-- this paint overrides the paint before
    }

    public void draw(Canvas canvas) {
        String score = String.valueOf(g.getScore());
        paintFG.getTextBounds(score, 0, score.length(), bounds);
        mid = (canvas.getWidth() / 2) - (bounds.width() / 2);

        // different "paints" but the same color
        canvas.drawText(score, mid, 60, paintBG);
        canvas.drawText(score, mid, 50, paintFG);
    }
}

来自德国的问候。：）

Answer 1

amahfouz解释了这个问题。该问题的一个解决方案是使用Paint的复制构造函数。

public Score(Paint paint) {
    paintBG = new Paint(paint);
    paintFG = new Paint(paint);
    paintBG.setColor(Color.GRAY);
    paintFG.setColor(Color.WHITE);
}

Answer 2

这是预期的。两个paint都引用了相同的Paint对象，作为参数传递。所以基本上，对setColor的调用都是修改同一个对象，最后一个是粘贴的对象！

zum wohle！

第二道涂料覆盖第一道漆

2 个答案: