[英]Android round a Layouts background image, only top or bottom corners
[英]Round top corners with Path
我正在尝试在Java中裁剪Canvas的左上角和右上角。 我了解您可以仅对所有拐角使用addRoundRect
,但是我不确定仅对顶部拐角做什么。
这是我目前拥有的:
@Override
protected void onDraw(Canvas canvas) {
float radius = 12f;
Path clipPath = new Path();
RectF rect = new RectF(0, 0, this.getWidth(), this.getHeight());
//uh...
//clipPath.addRoundRect(rect, radius, radius, Path.Direction.CW);
canvas.clipPath(clipPath);
super.onDraw(canvas);
}
您可以破解它。 只需将RectF设置为与圆角半径一样多的像素即可,如下所示:
RectF rect = new RectF(0, 0, this.getWidth(), this.getHeight() + 12.0f); // draw a larger rect
我猜您将不得不将绘画颜色设置为完全透明(0x00fffffff)。
您可以使用另一个重载方法addRoundRect(),如下所示:
int width = view.getWidth();
int height = view.getHeight();
float[] radii = {0, 0, 0, 0, 0, 0, 0, 0};
if( mRadiusTop ) {
radii[0] = mRadius;
radii[1] = mRadius;
radii[2] = mRadius;
radii[3] = mRadius;
}
if( mRadiusBottom ) {
radii[4] = mRadius;
radii[5] = mRadius;
radii[6] = mRadius;
radii[7] = mRadius;
}
clipPath.addRoundRect(new RectF(0, 0, width, height), radii, Path.Direction.CW);
canvas.clipPath(clipPath);
我通过上面的代码解决了这个问题。
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