android用存到缓存的方法来保存ListView里的数据

对于这种数据：

<?
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>婚礼在北海漂亮的北海公园举行…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server取到的数据，里面有个基本的对象mblog,我们用一个对象来存储:

public class MBlog implements <strong>Serializable</strong> {  //保证这个对象是能够序列化的
	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();

通常是/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();
		}
	}