XML解析

1.效果图：点击解析，显示books的信息

2.xml：boos.xml

1 <?xml version="1.0" encoding="utf-8"?>
2 <books>
3     <book price="100" pubDate="2018">Java</book>
4     <book price="90" pubDate="2017">Xml</book>
5     <book price="80" pubDate="2016">Android</book>
6 </books>

3.activity_main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.example.app3.MainActivity"
11     android:orientation="vertical">
12 
13 
14     <Button
15         android:id="@+id/bt"
16         android:hint="解析"
17         android:layout_width="match_parent"
18         android:layout_height="wrap_content" />
19     <TextView
20         android:id="@+id/tv"
21         android:layout_width="wrap_content"
22         android:layout_height="wrap_content"/>
23 </LinearLayout>

4.MainActivity.java

 1 package com.example.app3;
 2 
 3 import android.content.res.XmlResourceParser;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.widget.Button;
 8 import android.widget.TextView;
 9 
10 import org.xml.sax.helpers.XMLReaderAdapter;
11 import org.xmlpull.v1.XmlPullParserException;
12 
13 import java.io.IOException;
14 
15 public class MainActivity extends AppCompatActivity {
16     private Button button;
17     private TextView textView;
18 
19     @Override
20     protected void onCreate(Bundle savedInstanceState) {
21         super.onCreate(savedInstanceState);
22         setContentView(R.layout.activity_main);
23         button = (Button) findViewById(R.id.bt);
24         textView = (TextView) findViewById(R.id.tv);
25         button.setOnClickListener(new View.OnClickListener() {
26             @Override
27             public void onClick(View v) {
28                 XmlResourceParser xrp = getResources().getXml(R.xml.books);
29 
30                 try {
31                     StringBuffer stringBuffer =  new StringBuffer();
32                     while (xrp.getEventType()!=XmlResourceParser.END_DOCUMENT){
33                         if(xrp.getEventType() == XmlResourceParser.START_TAG){
34                             //获取标签名
35                             String bookinfo = xrp.getName();
36                             if(bookinfo.equals("book")){
37                                 String bookprice = xrp.getAttributeValue(0);
38                                 stringBuffer.append("价格：");
39                                 stringBuffer.append(bookprice+"  ");
40 
41                                 String bookDate = xrp.getAttributeValue(null,"pubDate");
42                                 stringBuffer.append("出版日期:");
43                                 stringBuffer.append(bookDate+"  ");
44 
45 
46                                 String bookname = xrp.nextText();
47                                 stringBuffer.append("作者：");
48                                 stringBuffer.append(bookname);
49 
50                             }
51                             stringBuffer.append("
");
52                         }
53                         xrp.next();
54                     }
55                     textView.setText(stringBuffer.toString());
56 
57                 } catch (XmlPullParserException e) {
58                     e.printStackTrace();
59                 }catch (IOException e) {
60                     e.printStackTrace();
61                 }
62             }
63         });
64     }
65 }