gistfile1.java

        private static void zipDex(File dexFile, File zippedDexFile) throws IOException
        {
                InputStream in = new FileInputStream(dexFile);
                OutputStream out = new FileOutputStream(zippedDexFile);
                ZipOutputStream zipOut = new ZipOutputStream(new BufferedOutputStream(out));
                ZipEntry classesEntry = new ZipEntry("classes.dex");
                zipOut.putNextEntry(classesEntry);
                byte[] buffer = new byte[1024];
                while (true) {
                        int read = in.read(buffer);
                        if (read == -1) break;
                        zipOut.write(buffer, 0, read);
                }
                in.close();
                zipOut.close();
        }