Image.createImage(..) gives OutOfMemoryError for 480x640 snapshot byte-arrays

[Steel_BRS]

Okay, here we go again. Test phones are:

• Nokia 3110 Classic
• Nokia 5200
• Nokia 6500 Classic

Common for the phones are, that Runtime.totalMemory is 2.048 kb. Another common thing for them are that they're all capable of taking 480x640 pixel snapshots:

byte[] capturedImageBytes = videoControl.getSnapshot("encoding=jpeg&width=480&height=640");

Unfortunately you can't decode this byte-array on the handset:

Image capturedImage = Image.createImage(capturedImageBytes, 0, capturedImageBytes.length);

... gives a java.lang.OutOfMemoryError. On the positive side, they can all handle the decoding of 240x320 snapshots.

So ... is there some way of requesting a larger heap in the .jad file - or perhaps at runtime?

[jappit]

Hi Steel_BRS,

there's no way to alter Java heap, in any way.. what you could try to do (but you've probably already done it) is to free up some memory taken from some other resources (e.g.: other images, streams, etc...) in your app before trying to create the snapshot Image.

Pit

[hartti]

Have you closed the camera player when you are decoding this byte array? If not, could you check that and report if the problem persists?

Do you have any details on the memory usage before the decoding call? Like freeMemory?

Hartti

[Steel_BRS]

Yes, I'm closing the player before Image.createImage(..)

Runtime.freeMemory varies between 562 - 594 kb during the last 5 test runs.

[Steel_BRS]

During some memory optimization (incl. lazy-loading of icons, etc.) to make my midlet work on the Motorola RAZR V3i I accidentally also solved this problem.
But you really have to be careful about how much you cache in memory.

[hartti]

Ok, thanks for reporting

Hartti

[Steel_BRS]

Just to specify: after memory optimization I can take 480x640 pixel snapshots and call createImage(..) without getting an OutOfMemoryError. This is the case on ALL my current Nokia test-phones:

• Nokia 3110 Classic
• Nokia 5200
• Nokia 6500 Classic