android读写XML

详细代码看附件！

布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="fill_parent" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:padding="@dimen/padding_medium"        android:text="@string/hello_world"        tools:context=".MainActivity" />    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/textView1"        android:layout_centerHorizontal="true"        android:text="@string/button1" />    <Button        android:id="@+id/button2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/button1"        android:layout_below="@+id/button1"        android:text="@string/button2" /></RelativeLayout>

适配文件：

dimens.xml：<resources>    <dimen name="padding_small">8dp</dimen>    <dimen name="padding_medium">8dp</dimen>    <dimen name="padding_large">16dp</dimen></resources>strings.xml：<resources>    <string name="app_name">ReadWriteXML</string>    <string name="button1">读取</string>    <string name="button2">写入</string>    <string name="hello_world">Hello world!</string>    <string name="menu_settings">Settings</string>    <string name="title_activity_main">xml读写</string></resources>

Person类：

package com.app.bean;public class Person {private Integer id;private String name;private Integer age;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}@Overridepublic String toString() {return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";}public Person(Integer id, String name, Integer age) {this.id = id;this.name = name;this.age = age;}public Person() {}}

MainActivity：

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.Toast;import com.app.bean.Person;import com.app.readwritexmliii.R;import com.app.service.PersonService;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {Button btn1 = null;    Button btn2 = null;super.onCreate(savedInstanceState);setContentView(R.layout.activity_main); btn1 = (Button)findViewById(R.id.button1);     btn1.setOnClickListener(new Btn1Click());      btn2 = (Button)findViewById(R.id.button2);     btn2.setOnClickListener(new Btn2Click());}private final class Btn1Click implements View.OnClickListener {    public void onClick(View v) {    List<Person> persons;try {InputStream inputStream = new FileInputStream(new File(getApplicationContext().getFilesDir(), "person.xml"));persons = PersonService.getPersons(inputStream);for (Person person : persons){    Toast.makeText(getApplicationContext(), person.toString(), Toast.LENGTH_SHORT).show();    }} catch (Exception e) {e.printStackTrace();}    }    }private final class Btn2Click implements View.OnClickListener {public void onClick(View v) {List<Person> persons = new ArrayList<Person>();persons.add(new Person(44,"fuchangle",27));persons.add(new Person(55, "zhangyanfeng", 27));persons.add(new Person(66, "xuliang", 25));try {File xmlFile = new File(getApplicationContext().getFilesDir(), "person.xml");System.out.println(xmlFile.getPath());FileOutputStream outStream = new FileOutputStream(xmlFile);PersonService.save(persons, outStream);Toast.makeText(getApplicationContext(), "写入" + persons.toString(), Toast.LENGTH_LONG).show();} catch (FileNotFoundException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}        }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}

PersonService.java

import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlSerializer;import android.util.Xml;import com.app.bean.Person;public class PersonService {public static List<Person> getPersons(InputStream xml) throws Exception {List<Person> persons = null;Person person = null;XmlPullParser pullParser = Xml.newPullParser();pullParser.setInput(xml, "UTF-8"); int event = pullParser.getEventType();while (event != XmlPullParser.END_DOCUMENT){switch (event) {case XmlPullParser.START_DOCUMENT:persons = new ArrayList<Person>();break;case XmlPullParser.START_TAG:if ("person".equals(pullParser.getName())){int id = Integer.valueOf(pullParser.getAttributeValue(0));person = new Person();person.setId(id);}if ("name".equals(pullParser.getName())){String name = pullParser.nextText();person.setName(name);}if ("age".equals(pullParser.getName())){int age = Integer.valueOf(pullParser.nextText());person.setAge(age);}break;case XmlPullParser.END_TAG:if ("person".equals(pullParser.getName())){persons.add(person);person = null;}break;}event = pullParser.next();}return persons;}/** * 写入文件 * @param persons * @param out * @throws Exception */public static void save(List<Person> persons, OutputStream out) throws Exception {XmlSerializer serializer = Xml.newSerializer();try {serializer.setOutput(out, "UTF-8");serializer.startDocument("UTF-8", true);serializer.startTag(null, "persons");for (Person person : persons) {serializer.startTag(null, "person");serializer.attribute(null, "id", person.getId().toString());serializer.startTag(null, "name");serializer.text(person.getName().toString());serializer.endTag(null, "name");serializer.startTag(null, "age");serializer.text(person.getAge().toString());serializer.endTag(null, "age");serializer.endTag(null, "person");}serializer.endTag(null, "persons");serializer.endDocument();} catch (Exception e) {e.printStackTrace();} finally {out.flush();out.close();}}}

更多相关文章

随机推荐