xml解析（使用pull解析)

发布时间：2020-12-16 09:37:03 所属栏目：百科来源：网络整理

导读：1.要解析的xml文件 ?xmlversion= "1.0" encoding= "utf-8" ? infos cityid= "1" temp 20 ℃/ 30 ℃/temp weather 5 月号多云转阴/weather wind南风 3 - 4 级/wind name上海/name pm 200 /pm /city "2" ℃/temp 21 号多云转阴/weather 6 7 级/wind name北京/

1.要解析的xml文件

 
 <?xmlversion= 
 "1.0" 
 encoding= 
 "utf-8" 
 ?> 

<infos> 

 
  
 <cityid= 
 "1" 
 > 

<temp> 
 20 
 ℃/ 
 30 
 ℃</temp> 

<weather> 
 5 
 月 
 号多云转阴</weather> 

<wind>南风 
 3 
 - 
 4 
 级</wind> 

<name>上海</name> 

<pm> 
 200 
 </pm> 

</city> 

"2" 
 > 

℃</temp> 

21 
 号多云转阴</weather> 

6 
 7 
 级</wind> 

<name>北京</name> 

100 
 </pm> 

</city> 

"3" 
 > 

10 
 ℃</temp> 

号多云转阴</weather> 

<wind>北风 
 级</wind> 

<name>长沙</name> 

</pm> 

</city> 

</infos> 

2.写一个实体类

 
 package 
 com.example.testpull; 

public 
 class 
 WeatherInfo{ 

 
 int 
 id; 

Stringname; 

Stringwind; 

Stringweather; 

Stringtemp; 

Stringpm; 

 
 @Override 

public 
 StringtoString(){ 

return 
 "id=" 
 +id+ 
 ",name=" 
 +name+ 
  
 +wind+ 
  

 
+weather+ 
  
 +temp+ 
  
 +pm; 
 
} 
 

   
 
} 
 
3.定义解析的方法

import 
 java.io.IOException; 

java.io.InputStream; 

java.util.ArrayList; 

java.util.List; 

org.xmlpull.v1.XmlPullParser; 

org.xmlpull.v1.XmlPullParserException; 

android.util.Xml; 

WeathearService{ 

static 
 List<WeatherInfo>getWeatherInfos(InputStreamis) 

throws 
 XmlPullParserException,IOException{ 

XmlPullParserparser=Xml.newPullParser(); 

List<WeatherInfo>weatherInfos= 
 null 
 ; 

WeatherInfoweatherInfo= 
 ; 

 
 //初始化解析器 

parser.setInput(is, 
 ); 

type=parser.getEventType(); 
 //得到事件类型 

while 
 (type!=XmlPullParser.END_DOCUMENT){ 

switch 
 (type){ 

case 
 XmlPullParser.START_TAG: 

if 
 ( 
 "infos" 
 .equals(parser.getName())){ 

weatherInfos= 
 new 
 ArrayList<WeatherInfo>(); 

} 
 else 
 "city" 
 .equals(parser.getName())){ 

weatherInfo= 
 WeatherInfo(); 

StringidStr=parser.getAttributeValue( 
 0 
 ); 

weatherInfo.id=Integer.parseInt(idStr); 

"temp" 
 .equals(parser.getName())){ 

Stringtemp=parser.nextText(); 

weatherInfo.temp=temp; 

"weather" 
 .equals(parser.getName())){ 

Stringweather=parser.nextText(); 

weatherInfo.weather=weather; 

"wind" 
 .equals(parser.getName())){ 

Stringwind=parser.nextText(); 

weatherInfo.wind=wind; 

"name" 
 .equals(parser.getName())){ 

Stringname=parser.nextText(); 

weatherInfo.name=name; 

"pm" 
 .equals(parser.getName())){ 

Stringpm=parser.nextText(); 

weatherInfo.pm=pm; 

}

break 
 ; 

XmlPullParser.END_TAG: 

.equals(parser.getName())){ 

//一个城市的信息处理完毕了 

weatherInfos.add(weatherInfo); 

;

}

;

}

type=parser.next(); 

}

return 
 weatherInfos; 

}

4.主main 

java.util.List; 

   
org.xmlpull.v1.XmlPullParserException; 
android.os.Bundle; 
android.app.Activity; 
android.widget.TextView; 

   
MainActivity 
 extends 
 Activity{ 
TextViewtv; 

   
@Override 
protected 
 void 
 onCreate(BundlesavedInstanceState){ 
super 
 .onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
tv=(TextView)findViewById(R.id.tv); 

   
List<WeatherInfo>infos= 
 ; 
try 
 { 
infos=WeathearService 
.getWeatherInfos(MainActivity. 
 .getClassLoader() 
.getResourceAsStream( 
 "weather.xml" 
 )); 
catch 
 (XmlPullParserExceptione){ 
e.printStackTrace(); 
(IOExceptione){ 
e.printStackTrace(); 
} 
StringBuildersb= 
 StringBuilder(); 
for 
 (WeatherInfoinfo:infos){ 
Stringstr=info.toString(); 
sb.append(str); 
sb.append( 
 "n" 
 ); 
} 
tv.setText(sb); 
} 

   
} 
（编辑：李大同）
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