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    <p>One of the most common errors that I found developing Android Apps is the “java.lang.OutOfMemoryError: Bitmap Size Exceeds VM Budget” error. I found this error frequently on activities using lots of bitmaps after changing orientation: the Activity is destroyed, created again and the layouts are “inflated” from the XML consuming the VM memory available for bitmaps.</p> <p>Bitmaps on the previous activity layout are not properly de-allocated by the garbage collector because they have crossed references to their activity. After many experiments I found a quite good solution for this problem.</p> <p>First, set the “id” attribute on the parent view of your XML layout:</p> <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/RootView" &gt; ... </code></pre> <p>Then, on the <code>onDestroy()</code> method of your Activity, call the <code>unbindDrawables()</code> method passing a reference to the parent View and then do a <code>System.gc()</code>.</p> <pre><code> @Override protected void onDestroy() { super.onDestroy(); unbindDrawables(findViewById(R.id.RootView)); System.gc(); } private void unbindDrawables(View view) { if (view.getBackground() != null) { view.getBackground().setCallback(null); } if (view instanceof ViewGroup) { for (int i = 0; i &lt; ((ViewGroup) view).getChildCount(); i++) { unbindDrawables(((ViewGroup) view).getChildAt(i)); } ((ViewGroup) view).removeAllViews(); } } </code></pre> <p>This <code>unbindDrawables()</code> method explores the view tree recursively and:</p> <ol> <li>Removes callbacks on all the background drawables</li> <li>Removes children on every viewgroup</li> </ol>
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    1. COExcept... java.lang.UnsupportedOperationException: removeAllViews() is not supported in AdapterView
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    2. COThanks this helps reduce my heap size significantly since I have a lot of drawables ... @GJTorikian for that just try catch at removeAllViews() most ViewGroup subclasses work just fine.
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    3. COOr just change the condition: if (view instanceof ViewGroup && !(view instanceof AdapterView))
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