Question

我试图用画布画一个圆弧：

canvas.drawArc(getCircleRect(), 90, 270, true, PaintCreator.createStrokePaintForArc());

..但没有明显效果

从getCircleRect（）得到的Rect的边界是正确的，我可以这样绘制矩形（仅用于测试）：

canvas.drawRect(getCircleRect(), PaintCreator.createStrokePaintForArc());

任何想法为什么drawRect正在工作而drawArc没有？感谢名单

    @Override
public void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.save();
    // not working
    canvas.drawArc(getCircleRect(), 90, 270, true, PaintCreator.createFillPaintArc());
    // working well
    canvas.drawRect(getCircleRect(), PaintCreator.createStrokePaintForArc());
    // working well
    canvas.drawCircle(x, y, RADIUS, fillPaint);
    move = false;
    canvas.restore();
}

Answer 1

我不确定，但我认为你的绘画对象可能是问题所在。试试这个

Paint mBgPaints = new Paint();
mBgPaints.setAntiAlias(true);
mBgPaints.setStyle(Paint.Style.FILL);
mBgPaints.setColor(Color.BLUE);
mBgPaints.setStrokeWidth(0.5f);
canvas.drawArc(getCircleRect(), 90, 270, true, mBgPaints);

android画布不是绘制Arc

1 个答案: