[android-developers] Re: OutOfMemoryError

"if you had a png that was mostly white so compressed very well
you might have a 200KB png file that actually is using 6MB of RAM on
your device" - I didn't know it can use so much space :/

About 90% of images (in total application, about 60% of them (this one
1KB) are used per activity, so I would say approx. 50KB per activity)
are 1KB (or less), 5% are 10-60KB and 5% are 1-5KB so I think image
size isn't a problem.

So I'm pretty sure it's A) but how to solve it? And yes, I'm
constantly switching between two-three activities (and I disabled
rotation for some other reasons).

On Jun 10, 7:20 pm, Eric F <ericfrie...@gmail.com> wrote:
> First you need to figure out what is taking up all the space in your
> memory as well as what is causing the OOM. Like is OOM caused when you
> switch between two activities over and over again? or if you rotate
> the phone over and over causing the activity to be re-created over and
> over. In which case you are probably leaking a context. Or are you
> running out of memory because you are loading just too many images? I
> don't think you've really given us enough information to help. If you
> use DDMS to inspect your heap, what's taking up all the space? If it's
> images, how big are the images? Remember in order for them to be drawn
> they need to be *uncompressed* into device's RAM. at say 24 bits per
> pixel, if you had a png that was mostly white so compressed very well
> you might have a 200KB png file that actually is using 6MB of RAM on
> your device. It's just too big, and you might not think about it
> because if you come from a desktop PC mindset it's just a 200KB png
> file in your mind. At this point I am guessing that either:
>
> A) you are leaking a context so the images aren't being recycled
> B) your images are too large uncompressed
>
> But without more information it's hard to be sure
>
> -E
>
> On Jun 10, 7:28 am, svebee <sven.kapud...@gmail.com> wrote:
>
> > hello, as I'm beginner in Android I have problem with memory - after
> > only 2-3 minutes I get Force Close and outOfMemory Error.
>
> > I have only onCreate (I know, stupid, but I didn't knew for anything
> > else as I started only few weeks ago) and inside I have...
>
> > @Override
> >  public void onCreate(Bundle savedInstanceState) {
> >   super.onCreate(savedInstanceState);
> >   setContentView(R.layout.main);
>
> >   many lines of code...manipulating with SQLite databases...
>
> > }
>
> > inside main XML layout I have many images, small, big (background) and
> > so on...How can I on every onCreate "delete" all content from memory
> > that was before in it - so when I open activity again, it deletes all
> > images and everything out and insert the new (old) one inside.
> > "Little" awkward but that's only thing I have on mind.
>
> > Also, inside "many lines of code" I don't declare any images!
>
> > Or simply, how can I "bypass" outOfMemoryError? Do I have to do
> > something like this?
>
> >  @Override
> >      public void onCreate(Bundle savedInstanceState) {
> >       super.onCreate(savedInstanceState);
>
> >         BitmapFactory.Options options=new BitmapFactory.Options();
> >         options.inSampleSize = 8;
> >         Bitmap buildingBitmap =
> > BitmapFactory.decodeResource(null,R.drawable.background,options);
>
> > if (buildingBitmap != null)
> >         {
> >         buildingBitmap.recycle();
> >         System.gc();
> >         buildingBitmap = null;
> >         }
>
> >       setContentView(R.layout.main);
>
> >       many lines of code...manipulating with SQLite databases...
>
> >     }
>
> > or...? Also on other activity is everything "the same" except I have
> > multiple overlays, how can I "erase" (recycle) them also? Thank you
> > for any help.
>
> > *currently, I'm not searching for fastest, most "correct" or better
> > solution, I just want something that it's not crashing all the time
>
>

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