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    <p>Android runs on a lot of hardware, much of which may not have much stack at all; instead of recursing through the subdirectories, do a breadth-first search, thus:</p> <pre><code>private List&lt;File&gt; getFileListingNoSort(File aStartingDir) { // assuming aStartingDir is a valid input List&lt;File&gt; dirsToSearch = new ArrayList&lt;File&gt;(); dirsToSearch.add(aStartingDir); List&lt;File&gt; resultArray = new ArrayList&lt;File&gt;(); do{ File thisDir = dirsToSearch.remove(0); List&lt;File&gt; filesDirs = Arrays.asList(thisDir.listFiles()); for (File file : filesDirs) { if (file.isDirectory()) { dirsToSearch.add(file); } else if( file.canRead() &amp;&amp; !file.isHidden() &amp;&amp; !file.getName().toLowerCase(loc).startsWith(CACHE) &amp;&amp; !file.getName().toLowerCase(loc).startsWith(TEMP)) { resultArray.add(file); } } } while(false == dirsToSearch.isEmpty()); return resultArray; } </code></pre> <p>caveat emptor: I didn't run or even see if this code compiles.</p> <p>But the idea is, maintain a list of directories, starting with the directory you are care about, remove the first directory from that list, add the files from that directory to the results (modify the code to add the directories to the resultArray if you want directories too), add the directories to the list of directories to search, and continue until the list of directories is empty.</p> <p>Recursion is bad if you can't know in advance how far you have to recurse, or how far you are able. I don't believe that file-system iteration is an appropriate place for recursion, but that's my own opinion.</p>
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    1. POjava.lang.StackOverflowError Recursive Directory
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    1. USBen Brammer
    1. USBen Brammer
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    1. COThanks Ben, but I'm a little confused - 'maintain a list of directories' <- How can I do that in the first place without recursively creating one!?
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    2. COwhen, during the course of iterating through filesDirs, you come across a directory, you add it to dirsToSearch; otherwise, you check to see if it meets your conditions, and if it does, add it to the resultsArray. The do...while loop will continue as long as there are directories that you have added but not listed, and the first step of listing a directory is to remove it from the dirsToSearch.
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    3. COI will need a little time to digest your suggested implementation. Thanks for returning to clarify.
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