What is the difference between addView and addViewInLayout？

轉自stackoverflow

Its generally a bad idea to call addView inside onLayout because addView internally triggers a requestLayout which eventually will call onLayout. So you end up triggering a layout while you are in the middle of a layout. addViewInLayout is a "safer" version of the addView in the case you really have to add a new view in onLayout. It basically doesn't trigger a layout pass (doesn't call requestLayout internally). See this video (by android engineer) for more detail: http://www.youtube.com/watch?v=HbAeTGoKG6k