首先，我把Person的实体类
package net.loonggg.test;
public class Person {
private int id;
private String age;
private String name;
private String sex;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Person [id=" + id + ", age=" + age + ", name=" + name
+ ", sex=" + sex + ", address=" + address + "]";
}
}
其次：生成xml文件的方法如下：
/**
* 生成xml
*/
private void createXml() {
XmlSerializer serializer = Xml.newSerializer();// xml文件生成器
File file = new File(Environment.getExternalStorageDirectory(),
"person.xml");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file);
serializer.setOutput(fos, "utf-8");// 为xml生成器设置输出流和字符编码
serializer.startDocument("utf-8", true);// 开始文档，参数分别为字符编码和是否保持独立
serializer.startTag(null, "persons"); // 开始标签,参数分别为：命名空间和标签名
for (Person person : list) {
serializer.startTag(null, "person");
serializer.attribute(null, "id", person.getId() + "");
serializer.startTag(null, "name");// 开始标签
serializer.text(person.getName());// 文本内容
serializer.endTag(null, "name");// 结束标签
serializer.startTag(null, "sex");
serializer.text(person.getSex());
serializer.endTag(null, "sex");
serializer.startTag(null, "age");
serializer.text(person.getAge());
serializer.endTag(null, "age");
serializer.startTag(null, "address");
serializer.text(person.getAddress());
serializer.endTag(null, "address");
serializer.endTag(null, "person");
}
serializer.endTag(null, "persons");// 结束标签
serializer.endDocument();// 结束xml文档
Toast.makeText(getApplicationContext(), "生成成功！", Toast.LENGTH_SHORT);
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "生成失败！", Toast.LENGTH_SHORT);
e.printStackTrace();
} finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
然后是解析xml文件的方法：
/**
* 解析xml文件
*/
private List<Person> pullXml() {
try {
File file = new File(Environment.getExternalStorageDirectory(),
"person.xml");
FileInputStream fis = new FileInputStream(file);
List<Person> persons = null;
Person person = null;
XmlPullParser parser = Xml.newPullParser();// 获取xml解析器
parser.setInput(fis, "utf-8");// 参数分别为输入流和字符编码
int type = parser.getEventType();
while (type != XmlPullParser.END_DOCUMENT) {// 如果事件不等于文档结束事件就继续循环
switch (type) {
case XmlPullParser.START_TAG:
if ("persons".equals(parser.getName())) {
persons = new ArrayList<Person>();
} else if ("person".equals(parser.getName())) {
person = new Person();
String id = parser.getAttributeValue(0);
person.setId(Integer.parseInt(id));
} else if ("name".equals(parser.getName())) {
person.setName(parser.nextText());
} else if ("sex".equals(parser.getName())) {
person.setSex(parser.nextText());
} else if ("address".equals(parser.getName())) {
person.setAddress(parser.nextText());
} else if ("age".equals(parser.getName())) {
person.setAge(parser.nextText());
}
break;
case XmlPullParser.END_TAG:
if ("person".equals(parser.getName())) {
persons.add(person);
person = null;
}
break;
}
type = parser.next();// 继续下一个事件
}
return persons;
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
再次是MainActivity里调用的部分代码：
public class MainActivity extends Activity {
private Button btn_create = null;
private Button btn_pull = null;
private TextView tv_show;
private List<Person> list = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_create = (Button) findViewById(R.id.createXml);
btn_pull = (Button) findViewById(R.id.pullXml);
tv_show = (TextView) findViewById(R.id.tvShow);
list = new ArrayList<Person>();
for (int i = 0; i < 5; i++) {
Person person = new Person();
person.setAge(i + 20 + "");
person.setId(i);
person.setName("loonggg" + i);
person.setSex("男");
person.setAddress("中南海" + i + 1 + "大街");
list.add(person);
}
btn_create.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
createXml();
}
});
btn_pull.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tv_show.setText(pullXml().toString());
}
});
}
}
