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    <p>Ohh Yes! I have solved it.. :)</p> <p>I have written following function that will create sub-folders recursively if required.</p> <p>This is tried and tested function that will successfully unzips any file.</p> <pre><code> /** * Unzips the file (recursively creates sub-folder if exists.) * * @param tempFileName * The zip file. * @param destinationPath * The destination path where unzipped file will be saved. */ public void unzipFile(String tempFileName, String destinationPath) { try { int index = destinationPath.lastIndexOf("\\"); String fileString = destinationPath.substring(index); File extFile = new File("/mnt/sdcard/courses1", fileString); if(!extFile.exists()) { createDir(extFile); } byte[] buffer = new byte[1024]; FileInputStream fin = new FileInputStream(tempFileName); ZipInputStream zin = new ZipInputStream(fin); ZipEntry zipentry = null; if (!(zin.available() == 0)) { byte[] startBuffer = new byte[8]; while ((zipentry = zin.getNextEntry()) != null) { String zipName = zipentry.getName(); if (zipName.startsWith("/")) { zipName = zipentry.getName(); } else if (zipName.startsWith("\\")) { zipName = zipentry.getName(); } else { zipName = "/" + zipentry.getName(); } String fileName = destinationPath + zipName; fileName = fileName.replace("\\", "/"); fileName = fileName.replace("//", "/"); if (zipentry.isDirectory()) { createDir(new File(fileName)); continue; } String name = zipentry.getName(); int start, end = 0; while (true) { start = name.indexOf('\\', end); end = name.indexOf('\\', start + 1); if (start &gt; 0) "check".toString(); if (end &gt; start &amp;&amp; end &gt; -1 &amp;&amp; start &gt; -1) { String dir = name.substring(1, end); createDir(new File(destinationPath + '/' + dir)); // name = name.substring(end); } else break; } File file = new File(fileName); FileOutputStream tempDexOut = new FileOutputStream(file); int BytesRead = 0; if (zipentry != null) { if (zin != null) { while ((BytesRead = zin.read(buffer)) != -1) { tempDexOut.write(buffer, 0, BytesRead); } tempDexOut.close(); } } } } } catch (Exception e) { Log.e("Exception", e.getMessage()); } } </code></pre> <p>I hope it helps someone. :)</p> <p>Thank you.</p>
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