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From Alex Harui <aha...@adobe.com>
Subject RE: list of images: poor performances
Date Mon, 30 Jun 2014 14:49:40 GMT
How many images are we talking about?  What pixel dimensions are the images in the list?  What
are some of the sizes in bytes of the images being downloaded?

-Alex
________________________________________
From: Gabriele Campi [gabriele.campi@medialogic.eu]
Sent: Monday, June 30, 2014 6:30 AM
To: Javier Guerrero García; users
Subject: Re: list of images: poor performances

Nothing seems to work... performances are even worse with a timer or delay
I cannot cache all the images because of memory consumption

Il 28/06/14 10:44, Javier Guerrero García ha scritto:
> Also adjust the opaqueBackground, don't set the image sources
> inmediately but after a short timeout (so if you scroll down fast
> skipping lets say 50 images you DON'T load 50 images before loading
> the 51st), and use a contentCache loader with queueing
> (http://corlan.org/2011/08/16/flex-mobile-development-caching-images-using-contentcache/)
>
>
> P.S. you can use the ContentCache straight from MXML, not like the
> sources in the link. Just declare it, set an ID and the rest of the
> parameters, and set contentCache="{id}" in your itemRenderer.
>
>
> On Sat, Jun 28, 2014 at 6:58 AM, Alex Harui <aharui@adobe.com
> <mailto:aharui@adobe.com>> wrote:
>
>     Make sure you are using a bitmap cache and that the images are not
>     being scaled down on the device.
>     Sent via the PANTECH Discover, an AT&T 4G LTE smartphone.
>
>     Gabriele Campi <gabriele.campi@medialogic.eu
>     <mailto:gabriele.campi@medialogic.eu>> wrote:
>
>
>     Hi,
>     in a mobile app I need to display a list of 200 images. On the list I
>     use a tileLayout with virtualLayout=true and a custom itemRenderer
>     that
>     only contains a Spark Image. On the set value method of the
>     itemrenderer
>     I change the source of the image with the path to the new bitmap.
>     It works, but performances are poor and the list doesn't scroll
>     well. On
>     iPad it's almost acceptable, but on Android I have to scroll row
>     by row
>     and wait until every image of the row is loaded.
>     Any suggestions to improve the situation?
>     Thanks
>
>     Gabriele
>
>


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