OutOfMemory Exception on Android

Question

I'm using in my application an external jar-library, which is working with bitmaps. This causes an out of memory exception in my application. This kind of problem is described in following issue: http://code.google.com/p/android/issues/detail?id=8488

Once OOME occurs, an activity crashes, application is still going runing, memory will be free, but the wifi-connection will be lost.

Is there the way to get memory free before activity crashes? Probably, I should say, I have no access to bitmaps, which are using by the library. I also tried to call System.gc() in onPause and onDestroy, but that doesn't help.

Why would be memory free when activity crashes?

What did happen with wi-fi-connection?

Thank you

upd

this library is osmdroid

It'd help if you documented the .jar usage. Maybe you're not calling the API which frees/recycles the bitmaps. Or maybe you're decoding large images at their native resolution and it's just too much. — Reuben Scratton
– Reuben Scratton, Commented Feb 8, 2011 at 11:38
This bibliothek is osmdroid, i haven't seen any api which frees / recycles the bitmaps. But I will take another look — Tima
– Tima, Commented Feb 8, 2011 at 14:59

Barmaley · Accepted Answer · 2011-02-08 11:32:16Z

1

Try to extend Application class with your own (need to be declared AndroidManifest.xml). In those Application class there's one method Application.onLowMemory() - which has to be called on low memory. You can override this method and try to release unnecessary resources. Probably it will be usefull.

answered Feb 8, 2011 at 11:32

Barmaley

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2 Comments

Tima Over a year ago

Ok, but how can i release unnecessary resources of the library (btw., it's osmdroid)?

Ilya Saunkin Over a year ago

@Mur You need to call the clear method of your MapTileCache instance. I found it easier to make the MapTileCache instance a singleton and then call in the body of onLowMemory implementation MapTileCache.getInstance().clear(); @barmaley that's a very right suggestion, thanx.

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