[android-developers] Re: Is there a callback that gets called right after onResume() ?

There is no callback - you can set flags in onResume() to know when
the activity is done with that part of the lifecycle. However, by
using layout_weight, you're telling Android to decide the size, which
it can't know until the screen is drawn, so a callback to change the
size won't work without a Handler to request a redraw or cycling
through onPause/onResume. So, you're going to need a Handler, which is
effectively a hack (to avoid layout_weight, you can get screen and
view dimensions and other data during onCreate/onStart/onResume to
calculate the available screen space yourself, determine which
elements will show and then calculate/recalculate certain element
sizes to get what you want, but that's a lot of work - a hack is
probably a better approach for this type of job).

If you want to determine the available size, then start a background
thread/timer at the end of onResume(), when you know how much space
you have for your elements, do the size calculations, then
runOnUIThread the changes and you should be fine. If you want to
guarantee the user does not see the changes, you're going to have to
work harder since the background thread/timer is not synchronized with
the UI.

-Jim

On Aug 6, 2:58 am, Zsombor <scythe...@gmail.com> wrote:
> Is there a callback that gets a call when everything in the current
> Activity got rendered?
>
> Because I need to know the exact sizes of some of my ViewGroups (their
> width/height are set using layout_weight in the layout xml), so I know
> how many elements fit inside them without scrolling. But I can only
> measure them after onResume. Is there a way to do this without some
> hack?

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