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

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  1. POAndroid: BitmapFactory.decodeStream() out of memory with a 400KB file with 2MB free heap
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    <p>My app is hitting an OOM error at the following line in the source:</p> <pre><code>image = BitmapFactory.decodeStream(assetManager.open(imgFilename)); </code></pre> <p>Just before the allocation that causes the app to be killed with an OOM error:</p> <pre><code>(...) 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 &lt;1K, 50% free 2709K/5379K, external 18296K/19336K, paused 58ms 08-05 21:22:14.513: D/dalvikvm(2319): GC_EXTERNAL_ALLOC freed &lt;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 </code></pre> <p>DDMS reports a similar picture about the state of the heap:</p> <pre><code>Heap Size: 5.254 MB Allocated: 2.647 MB Free: 2.607 MB %Used: 50.38% #Objects 49,028 </code></pre> <p>Single stepping over this line results in an OOM error:</p> <pre><code>08-05 21:26:04.783: D/dalvikvm(2319): GC_EXTERNAL_ALLOC freed &lt;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-&gt;decode returned false </code></pre> <ol> <li>The size of the file referenced by "imgFileName" is reported to be &lt; 400K on Windows. So why does BitmapFactory.decodeStream try to allocate 2MB?</li> <li>Why is there an OOM error when there seems to be enough free space?</li> </ol> <p>This app is targeting Android 2.2 and up.</p> <p>Thanks in advance!</p>
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