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canvas的问题，如何画出组合图形

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canvas的问题，如何画出组合图形

用canvers.draw方法是可以画出竖线但是如何把上面的圆形画出？如图中游标图片描述


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既然你已经可以画出一个线了，然后你就接着使用canvas.drawCircle画一个圆形，会让你传几个参数，圆心坐标，半径，等，然后你只需要根据线的位置，去计算出你的圆心的坐标，以及合适的半径，就OK了


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
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