android用存到缓存的方法来保存ListView里的数据

来源：互联网发布：美工论坛注册编辑：程序博客网时间：2024/06/06 01:37

对于这样的数据：

<?xml version="1.0" encoding="utf-8" ?><rss><sid>77f265bb46de068e78f35afbadec62af</sid><count>3</count><control>0</control><mblog><uid>1195224593</uid><favid>3436952795</favid><mblogid>5xtaJR</mblogid><mblogidnum>3436952795</mblogidnum><mblogtype>0</mblogtype><mlevel>0</mlevel><feedid>5xtaJR</feedid><nick>马艳丽</nick><portrait>http://tp2.sinaimg.cn/1195224593/50/5614100014/0</portrait><vip>1</vip><vipsubtype>0</vipsubtype><member_type>13</member_type><remark></remark><level>2</level><rtnum>11</rtnum><commentnum>25</commentnum><attitudenum>0</attitudenum><attitudeid>0</attitudeid><attitudes_status>0</attitudes_status><attitudes_count>0</attitudes_count><mblogtypename></mblogtypename><visible><type>0</type><list_id>0</list_id></visible><content>婚礼在北海美丽的北海公园举行…好美好浪漫的地方… </content><pic>http://ss12.sinaimg.cn/wap240/473dae11494344debfc5b</pic><time>1288852274</time><source>彩信</source></mblog></rss>

首先我们把从服务器取到的数据，里面有个主要的对象mblog,我们用一个对象来存储:

public class MBlog implements <strong>Serializable</strong> {  //保证这个对象是可以序列化的private static final long serialVersionUID = -3514924369786543050L;public String uid;public String favid;public String mblogid;public String nick;public String portrait;public boolean vip;public String content;public String rtrootuid;public String rtrootid;public String rtrootnick;public boolean rtrootvip;public String rtreason;public int rtnum;public int commentnum;public Date time;public String pic;public String src;public String longitude;// 经度public String latitude;// 纬度public boolean equals(Object o) {if (o == null) return false;if (o == this) return true;Class<?> cla = o.getClass();if (cla == getClass()) {MBlog other = (MBlog) o;if (other.mblogid.equals(mblogid)) return true;}return false;}public int hashCode() {return mblogid.hashCode() * 101 >> 12;}}

在Activity取到缓存的Path: mCacheDir = this.getCacheDir().getPath();

一般是/data/data/com.example.weibotest/cache

这个是save方法:

public static void save(Object obj, String path) {try {File f = new File(path);/*if(f != null){f.mkdirs();f.createNewFile();}*/FileOutputStream fos = new FileOutputStream(f);ObjectOutputStream oos = new ObjectOutputStream(fos);oos.writeObject(obj);oos.flush();oos.close();}catch (IOException e) {}}

读取方法:

public static Object load(String path) {Object obj = null;File file = new File(path);try {/*if(file != null){file.mkdirs();}*/if (file.exists()) {FileInputStream fis = new FileInputStream(file);ObjectInputStream ois = new ObjectInputStream(fis);try {obj = ois.readObject();}catch (ClassNotFoundException e) {}ois.close();}}catch (IOException e) {}return obj;}

这样来调用:

public void parseAssertData() {InputStream is = null;try {is = this.getAssets().open("11.xml", Context.MODE_PRIVATE);int length = is.available();byte[] buffer = new byte[length];is.read(buffer);String temp = new String(buffer);try {Object[] array = ParseData.getMBlogList(temp);List<MBlog> list = (List<MBlog>)array[1];FileUtils.save(list, mCacheDir+'/'+"001_fav");List<MBlog> list1 = (List<MBlog>)FileUtils.load(mCacheDir+'/'+"001_fav");MBlog blog = list1.get(1);System.out.println("===size="+blog.src);} catch (Exception e) {e.printStackTrace();}} catch (IOException ex) {ex.printStackTrace();}}

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