Question on memory management in android

by Anton S. » Wed, 05 Jan 2011 03:01:52 GMT

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I have a single image that is slightly larger than the android screen
which I load into a ScrollView.

My question is the following:

Does android load the entire image into memory even though parts of it
are invisible(need to be scrolled to),
or does it use some kind of external/internal cache to store parts of
the image that are not
currently visible? If not, do you think it would be possible to
implement something like this.



Re: Question on memory management in android

by Doug » Thu, 06 Jan 2011 08:51:12 GMT

 Bitmaps are going to take as much memory as they need for the grid of
pixels they represent.  If you want to store a giant image into a
giant bitmap (or even if you just want to create a giant empty bitmap)
you will consume that memory.

Android doesn't do so well with giant bitmaps that come and go because
they don't get garbage collected in the way you'd expect, and you'll
often run into memory problems if you attempt this.  It's a really
hairy topic with a lot of prior conversation around it that you can
easily search and find.



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Re: Re: Question on memory management in android

by Anton S » Fri, 07 Jan 2011 02:32:30 GMT

 Alright, so that means it does load the entire image into memory.

I guess I'll try to break up my image and only load parts of it as they are

Thanks for you input Doug!


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