draw->dispatchDraw(view没有实现)->viewgroup-dispatchDraw->drawChild-> viewchild->draw->onDraw
dispatchMessage->RUN->fRAMEdISPLAYeVENTrECEIVER->RUN->doFrame->doCallback-rn->performTraversal->MeasureHerarchy(ViewRootImpl)->performMeasure->measure->DescorView->onMeasure->measureChildWithMargins->child.measure->onMeasure->mearsuereVertical
image.png
未完待续
image.png
实际上还省略了measure的调用过程。因为此方法无法复写
这个时序图画的牛逼https://www.jianshu.com/p/fd25d552c500
