在Android中,drawCircle()
方法本身不支持直接自定义边框。但是,您可以通过以下步骤实现带有自定义边框的圆形:
ShapeDrawable
或GradientDrawable
。在这个类中,您可以设置圆形的属性,如颜色、大小和边框宽度及颜色。public class CustomCircleDrawable extends ShapeDrawable {
private int borderWidth;
private int borderColor;
public CustomCircleDrawable(int radius, int borderWidth, int borderColor) {
super(new RectF(-radius, -radius, radius, radius));
this.borderWidth = borderWidth;
this.borderColor = borderColor;
}
@Override
protected void onDraw(Canvas canvas, Rect bounds) {
Paint paint = getPaint();
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(borderWidth);
paint.setColor(borderColor);
super.onDraw(canvas, bounds);
}
}
CustomCircleDrawable customCircleDrawable = new CustomCircleDrawable(radius, borderWidth, borderColor);
Canvas canvas = new Canvas();
canvas.drawCircle(width / 2f, height / 2f, radius, customCircleDrawable);
这样,您就可以创建一个带有自定义边框的圆形了。