android 将对象写入SD卡中

来源：互联网发布：windows全部历代系统编辑：程序博客网时间：2024/05/31 06:22

上一篇文章中介绍了如何将对象保存在本地，这篇文章主要介绍如何将对象保存在SD卡中：

有了上一篇文章的基础，这里我只用介绍两个方法就OK了。

1. 将对象写入SD卡中

<span style="white-space:pre"></span>/** * @function 将一个对象保存到SD卡中 * @author D-light * @time 2014-07-23 * @param String name * @return void */private void saveObject2SD(String path){FileOutputStream fos = null;ObjectOutputStream oos = null;File dir = Environment.getExternalStorageDirectory();File file = new File(dir, path);try {fos = new FileOutputStream(file);oos = new ObjectOutputStream(fos);oos.writeObject(sod);} catch (Exception e) {e.printStackTrace();} finally {if (fos != null) {try {fos.close();} catch (Exception e) {e.printStackTrace();}}if (oos != null) {try {oos.close();} catch (IOException e) {e.printStackTrace();}}}}

2. 从SD卡中取得对象

<span style="white-space:pre"></span>/** * @function 从SD卡中读取保存的对象 * @author D-light * @time 2014-07-23 * @param String name * @return Object */private Object getObjectFromSD(String path){FileInputStream fis = null;ObjectInputStream ois = null;File dir = Environment.getExternalStorageDirectory();File file = new File(dir, path);try {fis = new FileInputStream(file);ois = new ObjectInputStream(fis);return ois.readObject();} catch (Exception e) {e.printStackTrace();} finally {if (fis != null) {try {fis.close();} catch (Exception e) {e.printStackTrace();}}if (ois != null) {try {ois.close();} catch (IOException e) {e.printStackTrace();}}}return null;}

根据上一篇文章的介绍，其实不难得到我们的结果：

还要加上权限：

<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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