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    <p>Some tests showed me that the default directory where Android stores files created by an application using <code>Context.getFilesDir()</code> is <code>/data/data/&lt;your_package_name&gt;/files</code></p> <p>To count the files in any given directory you use <code>File.listFiles(FileFilter)</code> over the root dir. Your FileFilter should then be something like this (to filter for ".rbc" files):</p> <pre><code>public static class RBCFileFilter implements FileFilter { @Override public boolean accept(File pathname) { String suffix = ".rbc"; if( pathname.getName().toLowerCase().endsWith(suffix) ) { return true; } return false; } } </code></pre> <p>If you have some kind of directory structure you need to recursively search then you will have to <code>File.listFiles(FileFilter)</code> over the entire directory structure. And it should be something like:</p> <pre><code>public static List&lt;File&gt; listFiles(File rootDir, FileFilter filter, boolean recursive) { List&lt;File&gt; result = new ArrayList&lt;File&gt;(); if( !rootDir.exists() || !rootDir.isDirectory() ) return result; //Add all files that comply with the given filter File[] files = rootDir.listFiles(filter); for( File f : files) { if( !result.contains(f) ) result.add(f); } //Recurse through all available dirs if we are scanning recursively if( recursive ) { File[] dirs = rootDir.listFiles(new DirFilter()); for( File f : dirs ) { if( f.canRead() ) { result.addAll(listFiles(f, filter, recursive)); } } } return result; } </code></pre> <p>And where <code>DirFilter</code> would implements <code>FileFilter</code> this way:</p> <pre><code>public static class DirFilter implements FileFilter { @Override public boolean accept(File pathname) { if( pathname.isDirectory() ) return true; return false; } } </code></pre>
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    1. POHow do I count the number of files with a specific extension on Android?
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    1. COGot everything working. Thanks so much :)
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      1. USRob S.
 

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