[android-developers] onLayout not always called after onMeasure

There are at least two passes made for laying out views, and my custom
view has onMeasure and onLayout overrides. At the end of onMeasure I
call setMeasuredDimension as required by the API, and then onLayout
usually gets called next. What I have noticed is that if, on the 2nd
pass, I call setMeasuredDimension with the same arguments as the first
time, then my onLayout is not called the 2nd time.

This was causing a bug in my app since I have several child views that I
need to size and rearrange within this parent container view. But since
what I am doing is to fit the child views into the visible space on the
screen, the "measured dimension" of the container view may not change
from one pass to the other, and the children don't get re-layed out (the
layout parameters from the 1st pass are not the final values).

I currently have a kludged workaround for this, but I'm wondering if it
would be OK to call layout() on my child views from within onDraw
instead of within onLayout. The parent view does get drawn first, so I
would guess that this wouldn't hurt anything.

Doug Gordon
GHCS Software

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