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    <blockquote> <p>The images are fetched from the Web, each ranging from 300K to 500K in size, and stored in an arrayList of Drawables.</p> </blockquote> <p>The kb file size of the image you're loading from the web isn't directly relevant. Since they're converted into bitmaps you need to calculate width * height * 4 bytes per image for regular ARGB images. (width and height in px).</p> <p>The bitmaps consume native heap, which usually doesn't show in a hprof. The hprof should only show you the number of objects, i.e. BitmapDrawables or Bitmaps that are left.</p> <p>I use this code in my app to output the current used memory used by the app and native heap:</p> <pre><code>public static void logHeap(Class clazz) { Double allocated = new Double(Debug.getNativeHeapAllocatedSize())/new Double((1048576)); Double available = new Double(Debug.getNativeHeapSize())/1048576.0); Double free = new Double(Debug.getNativeHeapFreeSize())/1048576.0); DecimalFormat df = new DecimalFormat(); df.setMaximumFractionDigits(2); df.setMinimumFractionDigits(2); Log.d(APP, "debug. ================================="); Log.d(APP, "debug.heap native: allocated " + df.format(allocated) + "MB of " + df.format(available) + "MB (" + df.format(free) + "MB free) in [" + clazz.getName().replaceAll("com.myapp.android.","") + "]"); Log.d(APP, "debug.memory: allocated: " + df.format(new Double(Runtime.getRuntime().totalMemory()/1048576)) + "MB of " + df.format(new Double(Runtime.getRuntime().maxMemory()/1048576))+ "MB (" + df.format(new Double(Runtime.getRuntime().freeMemory()/1048576)) +"MB free)"); System.gc(); System.gc(); // don't need to add the following lines, it's just an app specific handling in my app if (allocated&gt;=(new Double(Runtime.getRuntime().maxMemory())/new Double((1048576))-MEMORY_BUFFER_LIMIT_FOR_RESTART)) { android.os.Process.killProcess(android.os.Process.myPid()); } } </code></pre> <p>which I call when starting or finishing an activity during development.</p> <pre><code>logHeap(this.getClass()); </code></pre> <p>Here are some informative links - generally there are lots of threads about this topic on here.</p> <ul> <li><a href="https://stackoverflow.com/questions/1945142/bitmaps-in-android">Bitmaps in Android</a></li> <li><a href="https://stackoverflow.com/questions/2203806/android-eclipse-mat-does-not-appear-to-show-all-my-apps-objects">Android: Eclipse MAT does not appear to show all my app&#39;s objects</a></li> </ul> <p>Here's also a useful slide by Romain Guy (Android Framework engineer) about soft references, weak references, simple caches, image handling: <a href="http://docs.huihoo.com/google/io/2009/Th_0230_TurboChargeYourUI-HowtomakeyourAndroidUIfastandefficient.pdf" rel="nofollow noreferrer">http://docs.huihoo.com/google/io/2009/Th_0230_TurboChargeYourUI-HowtomakeyourAndroidUIfastandefficient.pdf</a></p>
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    1. POAndroid: out of memory exception in Gallery
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    1. COMathias, thanks a lot. I will give it a try
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    2. COMathias, I edited the question with some output using your function. what do you make of this? Thanks
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    3. COAfter carefully examining the heapLog output I realized that something is not cleared properly. I thought that setCallBack(null) and nulling the element would suffice, but only after applying recycle() the memory cleared. Thanks, Mathias.
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