如果您需要(在画布上)为不同的角绘制具有不同半径的圆形矩形,您可以使用以下命令:
private void drawAsymmetricRoundRect(Canvas canvas, RectF rectF, float[] radii, Paint paint) {
float topLeftX = rectF.left + radii[0];
float topLeftY = rectF.top + radii[0];
float topRightX = rectF.right - radii[1];
float topRightY = rectF.top + radii[1];
float bottomRightX = rectF.right - radii[2];
float bottomRightY = rectF.bottom - radii[2];
float bottomLeftY = rectF.bottom - radii[3];
float bottomLeftX = rectF.left + radii[3];
RectF topLeftCorner = new RectF(rectF.left, rectF.top, topLeftX + radii[0], topLeftY + radii[0]);
RectF topRightCorner = new RectF(topRightX - radii[1], rectF.top, rectF.right, topRightY + radii[1]);
RectF bottomRightCorner = new RectF(bottomRightX - radii[2], bottomRightY - radii[2], rectF.right, rectF.bottom);
RectF bottomLeftCorner = new RectF(rectF.left, bottomLeftY - radii[3], bottomLeftX + radii[3], rectF.bottom);
canvas.drawArc(topLeftCorner, 180, 90, true, paint);
canvas.drawArc(topRightCorner, 270, 90, true, paint);
canvas.drawArc(bottomRightCorner, 0, 90, true, paint);
canvas.drawArc(bottomLeftCorner, 90, 90, true, paint);
canvas.drawRect(topLeftX, rectF.top, topRightX, bottomLeftY < bottomRightY ? bottomLeftY : bottomRightY, paint); //top rect
canvas.drawRect(topLeftX > bottomLeftX ? topLeftX : bottomLeftX, topRightY, rectF.right, bottomRightY, paint); //right rect
canvas.drawRect(bottomLeftX, topLeftY > topRightY ? topLeftY : topRightY, bottomRightX, rectF.bottom, paint); //bottom rect
canvas.drawRect(rectF.left, topLeftY, bottomRightX < topRightX ? bottomRightX : topRightX, bottomLeftY, paint); //left rect
}
float[] radii
是一个浮点数组(长度 = 4),它存储角的半径大小(顺时针,从左上角 => 开始{topLeft, topRight, bottomRight, bottomLeft}
)。
基本上,这种方法绘制 4 个弧(角)并用 4 个矩形填充这些角之间的所有内容。
重要说明:我将角点的初始化放在RectFs
此方法中,以降低发布代码的复杂性。由于您可能会从您的方法中调用此方法onDraw()
,因此您应该提取这部分代码,并将其放置在您初始化其他的地方Rects
(只要您不初始化它们onDraw()
:P)。