Android实现向本地写入一个XML文件和解析XML文件

/**
	 * 向SD卡写入一个XML文件
	 * 
	 * @param v
	 */
	public void savexml(View v) {
 
		try {
			File file = new File(Environment.getExternalStorageDirectory(),
					"persons.xml");
			FileOutputStream fos = new FileOutputStream(file);
			// 获得一个序列化工具
			XmlSerializer serializer = Xml.newSerializer();
			serializer.setOutput(fos, "utf-8");
			// 设置文件头
			serializer.startDocument("utf-8", true);
			serializer.startTag(null, "persons");
			for (int i = 0; i <10; i++) {
				serializer.startTag(null, "person");
				serializer.attribute(null, "id", String.valueOf(i));
				// 写姓名
				serializer.startTag(null, "name");
				serializer.text("张三" + i);
				serializer.endTag(null, "name");
				// 写性别
				serializer.startTag(null, "gender");
				serializer.text("男" + i);
				serializer.endTag(null, "gender");
				// 写年龄
				serializer.startTag(null, "age");
				serializer.text("1" + i);
				serializer.endTag(null, "age");
 
				serializer.endTag(null, "person");
			}
			serializer.endTag(null, "persons");
			serializer.endDocument();
			fos.close();
			Toast.makeText(MainActivity.this, "写入成功", 0).show();
		} catch (Exception e) {
			e.printStackTrace();
			Toast.makeText(MainActivity.this, "写入失败", 0).show();
		}
 
	}

/**
	 * 读取SD卡中的XML文件,使用pull解析
	 * 
	 * @param v
	 */
	public void readxml(View v) {
 
		try {
			File path = new File(Environment.getExternalStorageDirectory(),
					"persons.xml");
			FileInputStream fis = new FileInputStream(path);
 
			// 获得pull解析器对象
			XmlPullParser parser = Xml.newPullParser();
			// 指定解析的文件和编码格式
			parser.setInput(fis, "utf-8");
 
			int eventType = parser.getEventType(); // 获得事件类型
 
			String id = null;
			String name = null;
			String gender = null;
			String age = null;
			while (eventType != XmlPullParser.END_DOCUMENT) {
				String tagName = parser.getName(); // 获得当前节点的名称
 
				switch (eventType) {
				case XmlPullParser.START_TAG: // 当前等于开始节点 
					if ("persons".equals(tagName)) { // 
					} else if ("person".equals(tagName)) { // 
						id = parser.getAttributeValue(null, "id");
					} else if ("name".equals(tagName)) { // 
						name = parser.nextText();
					}else if ("gender".equals(tagName)) { // 
						gender = parser.nextText();
					} else if ("age".equals(tagName)) { // 
						age = parser.nextText();
					}
					break;
				case XmlPullParser.END_TAG: // 
					if ("person".equals(tagName)) {
						Log.i(TAG, "id---" + id);
						Log.i(TAG, "name---" + name);
						Log.i(TAG, "gender---" + gender);
						Log.i(TAG, "age---" + age);
					}
					break;
				default:
					break;
				}
				eventType = parser.next(); // 获得下一个事件类型
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			
		}

public class XmlParser{
  public T xmlParser(InputStream xml) throws Exception {
    XmlPullParser pullParse = Xml.newPullParser();
    pullParse.setInput(xml, "UTF-8");
    int event = pullParse.getEventType();
    while (event != XmlPullParser.END_DOCUMENT) {
      switch (event) {

        case XmlPullParser.START_DOCUMENT:
          //文件开头
          break;

        case XmlPullParser.START_TAG:
          //标签开始标志
          //pullParse.getName() 获取标签名
          //pullParse.getAttributeValue(0)获取标签的参数
          //pullParse.nextText() 获取标签内的值

          break;

        case XmlPullParser.END_TAG:
          //标签结束标志
          break;
      }
      event = pullParse.next();//进行下一个标签的解析

    }
    return T;
  }
}