XML的序列化

public class Xml extends Activity {
	private List<SmsInfo> smsInfos;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// Todo Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_xml);
		//模拟短信信息的初始化
		SmsInfo smsinfo1=new SmsInfo("110","你好啊1",""+System.currentTimeMillis(),1);
		SmsInfo smsinfo2=new SmsInfo("111","你好啊2",1);
		SmsInfo smsinfo3=new SmsInfo("120","你好啊3",2);
		smsInfos=new ArrayList<SmsInfo>();
		smsInfos.add(smsinfo1);
		smsInfos.add(smsinfo2);
		smsInfos.add(smsinfo3);
		
	}
	//模拟保存
	public void click(View view){
		try {
			XmlSerializer serializer = android.util.Xml.newSerializer();//得到一个新的xml序列化器
			File file = new File(getFilesDir(),"sms.xml");
			FileOutputStream fos = new FileOutputStream(file);
			serializer.setoutput(fos,"utf-8");//文件的编码格式
			//第二个参数  ：是否是独立的，不是独立的就是依赖于另外一些文件
			serializer.startDocument("utf-8",true);//文件里面内容的编码
			serializer.startTag(null,"smss");//最外层的根节点
			for (SmsInfo smsInfo : smsInfos) {
				serializer.startTag(null,"sms");//每一条短信的节点
				
				serializer.startTag(null,"content");
				serializer.text(smsInfo.getContent());
				serializer.endTag(null,"content");
				
				serializer.startTag(null,"time");
				serializer.text(smsInfo.getTime());
				serializer.endTag(null,"time");
				
				serializer.startTag(null,"type");
				serializer.text(smsInfo.getType()+"");
				serializer.endTag(null,"type");
				
				serializer.endTag(null,"sms");
				
			}
			serializer.endTag(null,"smss");
			serializer.endDocument();
			fos.close();//写入流里面，最后关闭掉
		} catch (Exception e) {
		}
		
	}
}