android - 在android中的圆形路径上绘制文本

Question

我需要在圆形路径上绘制文本。
我试过 drawTextOnPath()方法。但是对于所附图像中的“肥沃窗口”之类的文本，文本会旋转并且不可读。





我用过的代码:

customPath2.addArc(mCircleRectF, 30F, 64.28F);
    customPaint2.setAntiAlias(true);
    customPaint2.setDither(true);
    customPaint2.setStrokeWidth(mCircleStrokeWidth);
    customPaint2.setColor(Color.parseColor("#93BE66"));
    customPaint2.setStyle(Paint.Style.STROKE);
    customPaint2.setStrokeCap(Paint.Cap.ROUND);
    canvas.drawPath(customPath2, customPaint2);

    titlePaint.setColor(Color.parseColor("#ffffff"));
    titlePaint.setAntiAlias(true);
    titlePaint.setTypeface(Typeface.MONOSPACE);  titlePaint.setLetterSpacing(0.07F);
    titlePaint.setTextAlign(Paint.Align.CENTER);
    titlePaint.setTextSize(35f);

    canvas.drawTextOnPath("FERTILE WINDOW", customPath2, 0, 8, titlePaint);

Answer 1

感谢评论的帮助，将文字“向外”绘制，制作弧线逆时针 .
在您的示例中， startAngle 变为 94.28并且sweepAngle 变为-64.28 .
Kotlin :

val enclosingRect = RectF(0f, 0f, 200f, 200f)
val path = Path()
path.addArc(enclosingRect, 94.28f, -64.28f)
canvas.drawTextOnPath("FERTILE WINDOW", path, 0f, 0f, myPaint)

java :

RectF enclosingRect = new RectF(0f, 0f, 200f, 200f);
Path path = new Path();
path.addArc(enclosingRect, 94.28f, -64.28f);
canvas.drawTextOnPath("FERTILE WINDOW", path, 0f, 0f, myPaint);

这适用于圆圈底部的文本(从 0 到 180 或从 -180 到 -360 度)。
对于 180 之间的角度和 360或 0和 -180您要绘制弧线的度数 顺时针 .