android文件或文件夾壓縮

private static final int BUFFER = 1024 * 1024;

	/**
	 * 壓縮目錄
	 * 
	 * @param File
	 *            dir
	 * @param ZipOutputStream
	 *            out
	 * @param String
	 *            basedir
	 */
	private void compress2Directory(File dir, ZipOutputStream out,
			String basedir) {
		if (!dir.exists())
			return;

		File[] files = dir.listFiles();
		if(files!=null && files.length !=0){
		for (int i = 0; i < files.length; i++) {
			compress(files[i], out, basedir + dir.getName() + "/");
		}
		}
	}

	/**
	 * 壓縮文件
	 * 
	 * @param File
	 *            file
	 * @param ZipOutputStream
	 *            out
	 * @param String
	 *            basedir
	 */
	private void compress2File(File file, ZipOutputStream out, String basedir) {
		if (!file.exists()) {
			return;
		}
		BufferedInputStream bis = null;
		try {
			bis = new BufferedInputStream(
					new FileInputStream(file));
			ZipEntry entry = new ZipEntry(basedir + file.getName());
			out.putNextEntry(entry);
			int count;
			byte data[] = new byte[BUFFER];
			while ((count = bis.read(data, 0, BUFFER)) != -1) {
				out.write(data, 0, count);
			}
		
		} catch (Exception e) {
			Write.debug(""+e.getMessage());
		}finally {
			try {
				bis.close();
			} catch (IOException e) {
				Write.debug(""+e.getMessage());
			}
		}
	}

	public void compress(File file, ZipOutputStream out, String basedir) {
		if (file.isFile()) {
			this.compress2File(file, out, basedir);
		} else {
			this.compress2Directory(file, out, basedir);
		}
	}