為了學(xué)習(xí)Pull解析xml，可以簡(jiǎn)單的做個(gè)小Demo

• 第一步：以字符串的形式創(chuàng)建出xml。
  String str = "<?xml version="1.0" encoding="UTF-8"?>\n" +
  "<persons>\n" +
  " <person id="1">\n" +
  " <name>小羅</name>\n" +
  " <age>21</age>\n" +
  " </person>\n" +
  " <person id="2">\n" +
  " <name>android</name>\n" +
  " <age>15</age>\n" +
  " </person>\n" +
  "</persons>";

• 第二步：根據(jù)xml文件封裝實(shí)體類(lèi)：
  public class Person implements Serializable {
  int id;
  String name;
  int age;
  public void setAge(int age) {
  this.age = age;
  }
  public void setId(int id) {
  this.id = id;
  }
  public void setName(String name) {
  this.name = name;
  }
  @Override public String toString() {
  return "Person{" +
  "age=" + age +
  ", id=" + id +
  ", name='" + name + ''' + '}';
  }
  }

• 第三步：創(chuàng)建解析方法：
  public List<Person> PullParseXml(InputStream inputStream) throws XmlPullParserException, IOException {
  List<Person> persons = new ArrayList<>();
  Person person = null;
  XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
  XmlPullParser xmlPullParser = factory.newPullParser();
  xmlPullParser.setInput(inputStream, "utf-8");
  int eventType = xmlPullParser.getEventType();
  while (eventType != XmlPullParser.END_DOCUMENT) {
  switch (eventType) {
  // 解析到文檔開(kāi)始的時(shí)候
  case XmlPullParser.START_DOCUMENT:
  persons = new ArrayList<Person>();
  break;
  // 解析到xml標(biāo)簽的時(shí)候
  case XmlPullParser.START_TAG:
  if ("person".equals(xmlPullParser.getName())) {
  person = new Person();
  // 得到person元素的第一個(gè)屬性，也就是ID
  person.setId(Integer.parseInt(xmlPullParser.getAttributeValue(0)));
  } else if ("name".equals(xmlPullParser.getName())) {
  // 如果是name元素，則通過(guò)nextText()方法得到元素的值
  person.setName(xmlPullParser.nextText());
  } else if ("age".equals(xmlPullParser.getName())) {
  person.setAge(Integer.parseInt(xmlPullParser.nextText()));
  }
  break;
  // 解析到xml標(biāo)簽結(jié)束的時(shí)候
  case XmlPullParser.END_TAG:
  if ("person".equals(xmlPullParser.getName())) {
  persons.add(person);
  person = null;
  }
  break;
  }
  // 通過(guò)next()方法觸發(fā)下一個(gè)事件
  eventType = xmlPullParser.next();
  }
  return persons;
  }

• 第四步：調(diào)用解析方法：
  byte[] bytes = str.getBytes();
  ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
  try {
  persons = PullParseXml(inputStream);
  Log.d("TAG", "size = " + persons.size());
  Log.d("TAG", persons.get(0).toString());
  Log.d("TAG", persons.get(1).toString());
  } catch (Exception e) {
  e.printStackTrace();
  }

• 第五步：運(yùn)行程序，你會(huì)得到如下Log：

Log.png