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Description
onSizeChanged
只是在大小被改变时调用,不是用来确定大小的,确定大小就是在onMeasure
里面完成的。onMeasure
是测量视图的大小的,这个没错,但是它测量大小也就是在确定它的大小,重写时就是根据情况确定(或者叫“测量”)你绘制的内容应该多大。
官方文档:
This is called during layout when the size of this view has changed. If you were just added to the view hierarchy, you're called with the old values of 0.
在布局期间,当视图的大小被改变的时候这个会被调用。如果视图是刚刚添加到视图层级中,旧的值会是0。
lindroy and WanDa1993
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