Android自定义控件知识.pdf
安卓自定义控件虽然Android自带了很多控件，但有时候还是不能满足需求。这时候，我们就需要定义自己的控件了。本文定义了一个控件本身，点击控件，可以让控件绘制不同的几何图形。
(Android custom controls
Although Android comes with many controls, sometimes it still can't meet the requirements. At this point, we need to define our own controls. This paper defines a control itself. Clicking the control can make the control draw different geometric shapes.)
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