Android解压缩zip的实现

android 解压缩zip包，需要在menifest.xml中加入sdcard读写权限，如下：
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

实现代码：
    /**
     * 解压缩文件到指定的目录.
     *
     * @param unZipfileName 需要解压缩的文件
     * @param mDestPath 解压缩后存放的路径
     */

 public static void unZip(String unZipfileName, String mDestPath) {
        if (!mDestPath.endsWith("/")) {
            mDestPath = mDestPath + "/";
        }
        FileOutputStream fileOut = null;
        ZipInputStream zipIn = null;
        ZipEntry zipEntry = null;
        File file = null;
        int readedBytes = 0;
        byte buf[] = new byte[4096];
        try {
            zipIn = new ZipInputStream(new BufferedInputStream(new FileInputStream(unZipfileName)));
            while ((zipEntry = zipIn.getNextEntry()) != null) {
                file = new File(mDestPath + zipEntry.getName());
                if (zipEntry.isDirectory()) {
                    file.mkdirs();
                } else {
                    // 如果指定文件的目录不存在,则创建之.
                    File parent = file.getParentFile();
                    if (!parent.exists()) {
                        parent.mkdirs();
                    }
                    fileOut = new FileOutputStream(file);
                    while ((readedBytes = zipIn.read(buf)) > 0) {
                        fileOut.write(buf, 0, readedBytes);
                    }
                    fileOut.close();
                }
                zipIn.closeEntry();
            }
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }