读写xml文件

xml文件：assets/person.xml

<?xml version="1.0" encoding="utf-8"?>
<persons>
    <person id="1">
        <name>jack</name>
        <password>12345</password>
    </person>
    <person id="2">
        <name>tom</name>
        <password>45733</password>
    </person>
    <person id="3">
        <name>helen</name>
        <password>123s432</password>
    </person>
</persons>

person类：

package com.example.xmldemo.domain;

public class Person {
    private int id;
    private String name;
    private String password;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Person(int id, String name, String password) {
        super();
        this.id = id;
        this.name = name;
        this.password = password;
    }

    public Person(String name, String password) {
        super();
        this.name = name;
        this.password = password;
    }

    public Person() {
    }
}

把xml文件内容转成object list：

private List<Person> xmlToObjList() {
        XmlPullParser parser = Xml.newPullParser();
        InputStream is = null;
        List<Person> xmlDatas = new ArrayList<Person>();
        try {
            is = getAssets().open("person.xml");
            // 关联要解析的xml文档
            parser.setInput(is, "utf-8");
            Person person = null;
            int event = parser.getEventType();
            // 不等于文档结束事件循环
            while (event != XmlPullParser.END_DOCUMENT) {
                if (XmlPullParser.START_TAG == event) {
                    // person标签开始
                    if ("person".equals(parser.getName())) {
                        person = new Person();
                        int pid = Integer.parseInt(parser.getAttributeValue(0));
                        person.setId(pid);
                    }
                    // name标签开始
                    if ("name".equals(parser.getName())) {
                        String name = parser.nextText();
                        person.setName(name);

                    }
                    if ("password".equals(parser.getName())) {
                        String password = parser.nextText();
                        person.setPassword(password);
                    }
                }
                if (XmlPullParser.END_TAG == event) {
                    // person标签结束
                    if ("person".equals(parser.getName())) {

                        xmlDatas.add(person);
                    }
                }
                event = parser.next();
            }

            // 验证：
            for (Person p : xmlDatas) {
                Log.i("XML", p.getName() + p.getPassword());
            }

        } catch (IOException e) {
            e.printStackTrace();
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return xmlDatas;
    }

把object list内容写入xml：

private void objToXml(List<Person> xmlDatas) {
        XmlSerializer serializer = Xml.newSerializer();
        OutputStream os = null;
        try {
            // 保存位置
            os = openFileOutput("person.xml", MODE_PRIVATE);
            serializer.setOutput(os, "utf-8");
            // 生成xml文件
            serializer.startDocument("utf-8", false);
            // 开始标签：<persons>
            serializer.startTag(null, "persons");
            for (Person person : xmlDatas) {
                // <person>
                serializer.startTag(null, "person");
                // 生成id属性
                serializer.attribute(null, "id", String.valueOf(person.getId()));
                // <name>标签
                serializer.startTag(null, "name");
                // 内容
                serializer.text(person.getName());
                // </name>标签
                serializer.endTag(null, "name");

                serializer.startTag(null, "password");
                serializer.text(person.getPassword());
                serializer.endTag(null, "password");

                serializer.endTag(null, "person");
            }
            serializer.endTag(null, "persons");
            // 结束
            serializer.endDocument();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        Toast.makeText(this, "success", Toast.LENGTH_SHORT).show();
    }

源码地址：

https://github.com/amorypepelu/XMLDemo