android - 如何更改起点drawrect customview android

Question

我想按进度绘制像这张图片一样的自定义drawrect:



但是，我的问题是将左上角的起点更改为中上角，到目前为止，这是我的自定义 View :

public class RoundProgress extends View {
Path path = new Path();
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
float length;
float[] intervals = {0, 0};

public RoundProgress(Context context) {
    super(context);
    paint.setColor(Color.BLUE);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(100);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    path.reset();
    RectF rect = new RectF(0, 0, w, h);
    float inset = paint.getStrokeWidth();
    rect.inset(inset, inset);

    path.addRoundRect(rect, 100, 100, Path.Direction.CCW);
    length = new PathMeasure(path, false).getLength();
    intervals[0] = intervals[1] = length;
    PathEffect effect = new DashPathEffect(intervals, length);
    paint.setPathEffect(effect);
}

public void setProgress(int progress) {
    PathEffect effect = new DashPathEffect(intervals, length - length * progress / 100);
    paint.setPathEffect(effect);
    invalidate();
}

@Override
protected void onDraw(Canvas canvas) {
    canvas.drawPath(path, paint);
}

}

任何人都知道如何改变它？我已经尝试更改 path.move(x, y) 但它不起作用。

Answer 1

对于所有不喜欢猜测的人来说，没有办法改变用 addRoundedRect 创建的圆角矩形的起点。
改为使用自定义路径绘制它:

fun createRoundedRectWithCustomStartPoint(viewWidth: Float, viewHeight: Float) {

        val radius = 20f
        val strokeWidthHalf = paint.strokeWidth/2
        val top = strokeWidthHalf
        val start = strokeWidthHalf

        path.apply {
            moveTo(viewWidth/2, top)
            lineTo(viewWidth - radius, top)
            arcTo(viewWidth - 2 * radius, top, viewWidth, 2 * radius, -90F, 90F, false)
            lineTo(viewWidth, radius)
            arcTo(viewWidth - 2 * radius, viewHeight - 2 * radius, viewWidth, viewHeight, 0F, 90F, false)
            lineTo(radius, viewHeight)
            arcTo(start, viewHeight - 2 * radius, 2 * radius, viewHeight, 90F, 90F, false)
            lineTo(start, radius)
            arcTo(start, top, 2 * radius, 2 * radius, 180F, 90F, false)
            lineTo(viewWidth/2, top)
        }
    }

    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
        path.reset()
        createRoundedRectWithCustomStartPoint(viewWidth = w.toFloat()-paint.strokeWidth/2,viewHeight = h.toFloat()-paint.strokeWidth/2)
        length = PathMeasure(path, false).length
        intervals[1] = length
        intervals[0] = intervals[1]
        val effect: PathEffect = DashPathEffect(intervals, length)
        paint.pathEffect = effect
    }