Android: BitmapFactory.decodeStream() out of memory with a 400KB file with 2MB free heap

user_901185 0
Viewed 99744

My app is hitting an OOM error at the following line in the source:

image = BitmapFactory.decodeStream(assetManager.open(imgFilename));

Just before the allocation that causes the app to be killed with an OOM error:

(...)
08-05 21:22:12.443: I/dalvikvm-heap(2319): Clamp target GC heap from 25.056MB to 24.000MB
08-05 21:22:12.443: D/dalvikvm(2319): GC_FOR_MALLOC freed <1K, 50% free 2709K/5379K, external 18296K/19336K, paused 58ms
08-05 21:22:14.513: D/dalvikvm(2319): GC_EXTERNAL_ALLOC freed <1K, 50% free 2709K/5379K, external 18296K/19336K, paused 101ms
08-05 21:22:14.903: I/dalvikvm-heap(2319): Clamp target GC heap from 25.073MB to 24.000MB
08-05 21:22:14.903: D/dalvikvm(2319): GC_FOR_MALLOC freed 0K, 50% free 2709K/5379K, external 18312K/19336K, paused 53ms
08-05 21:22:22.843: D/ddm-heap(2319): Heap GC request
08-05 21:22:22.963: I/dalvikvm-heap(2319): Clamp target GC heap from 25.073MB to 24.000MB
08-05 21:22:22.963: D/dalvikvm(2319): threadid=1: still suspended after undo (sc=1 dc=1)
08-05 21:22:22.963: D/dalvikvm(2319): GC_EXPLICIT freed 1K, 50% free 2710K/5379K, external 18312K/19336K, paused 116ms

DDMS reports a similar picture about the state of the heap:

Heap Size:  5.254 MB
Allocated:  2.647 MB
Free:   2.607 MB
%Used:  50.38%
#Objects    49,028

Single stepping over this line results in an OOM error:

08-05 21:26:04.783: D/dalvikvm(2319): GC_EXTERNAL_ALLOC freed <1K, 50% free 2710K/5379K, external 18312K/19336K, paused 57ms
08-05 21:26:05.023: E/dalvikvm-heap(2319): 2097152-byte external allocation too large for this process.
08-05 21:26:05.163: I/dalvikvm-heap(2319): Clamp target GC heap from 25.073MB to 24.000MB
08-05 21:26:05.163: E/GraphicsJNI(2319): VM won't let us allocate 2097152 bytes
08-05 21:26:05.163: D/dalvikvm(2319): GC_FOR_MALLOC freed 0K, 50% free 2710K/5379K, external 18312K/19336K, paused 30ms
08-05 21:26:05.283: D/skia(2319): --- decoder->decode returned false
  1. The size of the file referenced by "imgFileName" is reported to be < 400K on Windows. So why does BitmapFactory.decodeStream try to allocate 2MB?
  2. Why is there an OOM error when there seems to be enough free space?

This app is targeting Android 2.2 and up.

Thanks in advance!

heap-memory android
8 Answers

You can try to assign the bitmap via Glide library. Glide uses the most appropriate method (specific to your device and environment) to port the bitmap file into the graphical layer(ImageView).

Nice and easy:

Glide.with(getContext())
            .load(imageFile.getPath())
            .into(previewImageView);
user_47995990

I resolved OutOfMemoryError issue using below method

private Bitmap downloadImageBitmap(String sUrl) {
        this.url = sUrl;
        bitmap = null;
                    try {
            BitmapFactory.Options options = new BitmapFactory.Options();
            for (options.inSampleSize = 1; options.inSampleSize <= 32; options.inSampleSize++) {
                InputStream inputStream = new URL(sUrl).openStream();  
                try {
                    bitmap = BitmapFactory.decodeStream(inputStream, null, options);      
                    inputStream.close();
                    break;
                } catch (OutOfMemoryError outOfMemoryError) {
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return bitmap;
    }
user_28973650
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