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copied!<p>This code should do the trick. </p> <p>Note: you must add file write permissions to your app by adding the WRITE_EXTERNAL_STORAGE permission to your manifest.xml file. </p> <pre><code>/* * * Zips a file at a location and places the resulting zip file at the toLocation * Example: zipFileAtPath("downloads/myfolder", "downloads/myFolder.zip"); */ public boolean zipFileAtPath(String sourcePath, String toLocation) { final int BUFFER = 2048; File sourceFile = new File(sourcePath); try { BufferedInputStream origin = null; FileOutputStream dest = new FileOutputStream(toLocation); ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream( dest)); if (sourceFile.isDirectory()) { zipSubFolder(out, sourceFile, sourceFile.getParent().length()); } else { byte data[] = new byte[BUFFER]; FileInputStream fi = new FileInputStream(sourcePath); origin = new BufferedInputStream(fi, BUFFER); ZipEntry entry = new ZipEntry(getLastPathComponent(sourcePath)); entry.setTime(sourceFile.lastModified()); // to keep modification time after unzipping out.putNextEntry(entry); int count; while ((count = origin.read(data, 0, BUFFER)) != -1) { out.write(data, 0, count); } } out.close(); } catch (Exception e) { e.printStackTrace(); return false; } return true; } /* * * Zips a subfolder * */ private void zipSubFolder(ZipOutputStream out, File folder, int basePathLength) throws IOException { final int BUFFER = 2048; File[] fileList = folder.listFiles(); BufferedInputStream origin = null; for (File file : fileList) { if (file.isDirectory()) { zipSubFolder(out, file, basePathLength); } else { byte data[] = new byte[BUFFER]; String unmodifiedFilePath = file.getPath(); String relativePath = unmodifiedFilePath .substring(basePathLength); FileInputStream fi = new FileInputStream(unmodifiedFilePath); origin = new BufferedInputStream(fi, BUFFER); ZipEntry entry = new ZipEntry(relativePath); entry.setTime(file.lastModified()); // to keep modification time after unzipping out.putNextEntry(entry); int count; while ((count = origin.read(data, 0, BUFFER)) != -1) { out.write(data, 0, count); } origin.close(); } } } /* * gets the last path component * * Example: getLastPathComponent("downloads/example/fileToZip"); * Result: "fileToZip" */ public String getLastPathComponent(String filePath) { String[] segments = filePath.split("/"); if (segments.length == 0) return ""; String lastPathComponent = segments[segments.length - 1]; return lastPathComponent; } </code></pre>

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