Re: [android-developers] Total Available memory for Memory Management logic.
The thing is that Android OS will allocate the memory according to the needs of a process (up to maximum memory allowed). So, if were able to establish the amount of free memory that your app has available, the OS might increase this allowance as soon as you allocate next bitmap, therefore the whole method makes little sense. Instead build a HashMap that uses soft references to build a primitive cache with random eviction policy. The bitmaps will get removed as the process is running low on memory. There are few good articles about the usage of soft and weak references to implement primitive caches in Java. This gives you a solution that will adapt to whatever memory allowance is there (different per OS version) with all the memory management duties shifted to the platform. Here is one such article: http://www.javaspecialists.eu/archive/Issue015.html Daniel On 25 April 2012 16:57, Anieeh animesh.andr...@gmail.com wrote: Hi all I am having problem with releasing memory problem, i have a Hashmap in which i am adding Bitmap object, and the no. of bitmaps are quite large. for this reason i am getting OutOfMemoryError. So for this i have decided to release Bitmap whic is least used from Collection, on memory crunch or system getting low heap memory. For getting current memory available i used ActivityManager.MemoryInfo.availMem but it gives total RAM size memory, not Available Heap memory. And i found that this memory is not getting updated on releasing Bitmap from collection. Then i have used these three method Debug.getNativeHeapAllocatedSize() Debug.getNativeHeapFreeSize() Debug.getNativeHeapSize() but found the NativeHeapSize goes on increasing upto some certain say 16MB changing after that an outOfMemoryError occur. In this also i found that the NativeHeapAllocatedSize and getNativeHeapSize not decreasing on releasing Bitmap from collection. So please help me for solving the problem if anyone facing the same problem and fixed earlier it. My problem is i want to calculate Max Available application memory allocated and currently available memory, for such that if currently available memory goes beyond the Threshold memory i will release some Bitmap from the collection and GC will reclaim the memory and free it without generating error. Thanks in advance Anieeh -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- Daniel Drozdzewski -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Total Available memory for Memory Management logic.
Hi all I am having problem with releasing memory problem, i have a Hashmap in which i am adding Bitmap object, and the no. of bitmaps are quite large. for this reason i am getting OutOfMemoryError. So for this i have decided to release Bitmap whic is least used from Collection, on memory crunch or system getting low heap memory. For getting current memory available i used ActivityManager.MemoryInfo.availMem but it gives total RAM size memory, not Available Heap memory. And i found that this memory is not getting updated on releasing Bitmap from collection. Then i have used these three method Debug.getNativeHeapAllocatedSize() Debug.getNativeHeapFreeSize() Debug.getNativeHeapSize() but found the NativeHeapSize goes on increasing upto some certain say 16MB changing after that an outOfMemoryError occur. In this also i found that the NativeHeapAllocatedSize and getNativeHeapSize not decreasing on releasing Bitmap from collection. So please help me for solving the problem if anyone facing the same problem and fixed earlier it. My problem is i want to calculate Max Available application memory allocated and currently available memory, for such that if currently available memory goes beyond the Threshold memory i will release some Bitmap from the collection and GC will reclaim the memory and free it without generating error. Thanks in advance Anieeh -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Total Available memory for Memory Management logic.
I asked a similar question recently: http://groups.google.com/group/android-developers/browse_thread/thread/5c26876b19de1a4d/d843121085218de7?lnk=gstq=bitmap.recycle#d843121085218de7 Check it out, Romain gave some good explanations there. If you'd just like to free some memory on out-of-memory condition you shouldn't need exact numbers (those are hard to get as explained in the linked topic). Why don't you just catch OutOfMemoryError and handle it by freeing your least recently used bitmaps, then perhaps restart the operation that caused the fault? Do you need an early warning (even before you actually run out of heap) for some reason? On Wed, Apr 25, 2012 at 5:57 PM, Anieeh animesh.andr...@gmail.com wrote: Hi all I am having problem with releasing memory problem, i have a Hashmap in which i am adding Bitmap object, and the no. of bitmaps are quite large. for this reason i am getting OutOfMemoryError. So for this i have decided to release Bitmap whic is least used from Collection, on memory crunch or system getting low heap memory. For getting current memory available i used ActivityManager.MemoryInfo.availMem but it gives total RAM size memory, not Available Heap memory. And i found that this memory is not getting updated on releasing Bitmap from collection. Then i have used these three method Debug.getNativeHeapAllocatedSize() Debug.getNativeHeapFreeSize() Debug.getNativeHeapSize() but found the NativeHeapSize goes on increasing upto some certain say 16MB changing after that an outOfMemoryError occur. In this also i found that the NativeHeapAllocatedSize and getNativeHeapSize not decreasing on releasing Bitmap from collection. So please help me for solving the problem if anyone facing the same problem and fixed earlier it. My problem is i want to calculate Max Available application memory allocated and currently available memory, for such that if currently available memory goes beyond the Threshold memory i will release some Bitmap from the collection and GC will reclaim the memory and free it without generating error. Thanks in advance Anieeh -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
