我正在尝试使用 XML Pull Parser 进行 XML 解析。但我只得到 nametitle & name 的数据。对于其余数据，我得到了异常。下面我发布我的代码。
主要活动
public class PullParsingActivity extends Activity
{
private static final String urL =
"https://dl.dropbox.com/u/85981610/user.xml";
Button parseData;
private final String TAG = "PARSED DATA";
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
parseData = (Button)findViewById(R.id.parseData);
parseData.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
try
{
URL url = new URL(urL);
url.openConnection();
PullParser pullParser = new PullParser();
pullParser.parse(url.openStream());
}//try
catch (MalformedURLException e)
{
Log.e("PullParsingActivity", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsingActivity", e.getMessage());
}//catch
}//onClick
});
}//onCreate
}//PullParsingActivity
解析器类
public class PullParser
{
private static final String ns = null;//set to null as we will not use namespace
Entry e1;
/*Method to parse data*/
public List<Entry> parse(InputStream is)
{
XmlPullParser xpp = Xml.newPullParser();
try
{
xpp.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
xpp.setInput(is, "UTF-8");
/*Call next() & return event START_TAG or END_TAG*/
xpp.nextTag();
Log.i("PullParsing nextTag", ""+xpp.nextTag());
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing1", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing2", e.getMessage());
}//catch
finally
{
try
{
is.close();
}//try
catch (IOException e)
{
Log.e("Pull Parsing3", e.getMessage());
}//catch
}//finally
return readFeed(xpp);
}//parse
/*read data from xml*/
public List<Entry> readFeed(XmlPullParser parser)
{
List<Entry> parsedData = new ArrayList<Entry>();
try
{
/*checks whether current event type, namespace & name match*/
parser.require(XmlPullParser.START_TAG, ns, "menu");
while(parser.next() != XmlPullParser.END_TAG)
{
if(parser.getEventType() != XmlPullParser.START_TAG)
{
continue;
}//if
String name = parser.getName();
/*look for the required tag*/
if(name.equalsIgnoreCase("item"))
{
parsedData.add(readEntry(parser));
}//if
else
{
skip(parser);
}//else
}//while
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing4", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing5", e.getMessage());
}//catch
return parsedData;
}//readFeed
public Entry readEntry(XmlPullParser parser)
{
String nametitle = null;
String name = null;
String email = null;
String mobile = null;
String website = null;
String jobtitle = null;
String company = null;
String businessphone = null;
String homephone = null;
String skype = null;
String faxno = null;
String businessaddress = null;
String homeaddress = null;
String otheraddress = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "item");
while(parser.next() != XmlPullParser.END_TAG)
{
if(parser.getEventType() != XmlPullParser.START_TAG)
{
continue;
}//if
String parsedName = parser.getName();
if(parsedName.equalsIgnoreCase("nametitle"))
{
nametitle = readNameTitle(parser);
}//if
else if (parsedName.equalsIgnoreCase("name"))
{
name = readName(parser);
}//else if
else if (name.equalsIgnoreCase("email"))
{
email = readEmail(parser);
}//else if
else if (name.equalsIgnoreCase("mobile"))
{
mobile = readMobile(parser);
}//else if
else if (name.equalsIgnoreCase("website"))
{
website = readWebsite(parser);
}//else if
else if (name.equalsIgnoreCase("jobtitle"))
{
jobtitle = readJobTitle(parser);
}//else if
else if (name.equalsIgnoreCase("company"))
{
company = readCompany(parser);
}//else if
else if (name.equalsIgnoreCase("businessphone"))
{
businessphone = readBusinessPhone(parser);
}//else if
else if (name.equalsIgnoreCase("homephone"))
{
homephone = readHomePhone(parser);
}//else if
else if (name.equalsIgnoreCase("skype"))
{
skype = readSkype(parser);
}//else if
else if (name.equalsIgnoreCase("faxno"))
{
faxno = readFaxNo(parser);
}//else if
else if (name.equalsIgnoreCase("businessaddress"))
{
businessaddress = readBusinessAddress(parser);
}//else if
else if (name.equalsIgnoreCase("homeaddress"))
{
homeaddress = readHomeAddress(parser);
}//else if
else if (name.equalsIgnoreCase("otheraddress"))
{
otheraddress = readOtherAddress(parser);
}//else if
else
{
skip(parser);
}//else
}//while
}//try
catch (XmlPullParserException e)
{
Log.e("Pull Parsing6", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("Pull Parsing7", e.getMessage());
}//catch
e1 = new Entry(nametitle, name, email, mobile, website, jobtitle,
company, businessphone, homephone, skype, faxno, businessaddress,
homeaddress, otheraddress);
Log.d("PARSED DATA", e1.nametitle);
Log.d("PARSED DATA", e1.name);
//Log.d("PARSED DATA", e1.website);
return e1;
}//readEntry
private String readFaxNo(XmlPullParser parser)
{
String faxno = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "faxno");
faxno = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "faxno");
}//try
catch (XmlPullParserException e)
{
Log.e("Pull Parsing8", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("Pull Parsing9", e.getMessage());
}//catch
return faxno;
}//readFaxNo
public String readNameTitle(XmlPullParser parser)
{
String nameTitle = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "nametitle");
nameTitle = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "nametitle");
}//try
catch (XmlPullParserException e)
{
Log.e("Pull Parsing8", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("Pull Parsing9", e.getMessage());
}//catch
return nameTitle;
}//readTitle
public String readName(XmlPullParser parser)
{
String name = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "name");
name = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "name");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing10", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing11", e.getMessage());
}//catch
return name;
}//readLink
public String readEmail(XmlPullParser parser)
{
String email = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "email");
email = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "email");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing12", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing13", e.getMessage());
}//catch
return email;
}//readEmail
public String readMobile(XmlPullParser parser)
{
String mobile = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "mobile");
mobile = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "mobile");
}//try
catch(XmlPullParserException e)
{
Log.e("PullParsing 14", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing 15", e.getMessage());
}//catch
return mobile;
}//readMobile
public String readWebsite(XmlPullParser parser)
{
String website = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "website");
website = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "website");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing16", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing17", e.getMessage());
}//catch
return website;
}//readWebsite
public String readJobTitle(XmlPullParser parser)
{
String jobTitle = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "jobtitle");
jobTitle = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "jobtitle");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing18", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing19", e.getMessage());
}//catch
return jobTitle;
}//readEmail
public String readCompany(XmlPullParser parser)
{
String company = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "comapny");
company = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "company");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing20", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing21", e.getMessage());
}//catch
return company;
}//readcompany
public String readBusinessPhone(XmlPullParser parser)
{
String businessPhone = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "businessphone");
businessPhone = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "businessphone");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing22", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing23", e.getMessage());
}//catch
return businessPhone;
}//readBusinessPhone
public String readHomePhone(XmlPullParser parser)
{
String homePhone = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "homephone");
homePhone = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "homephone");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing24", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing25", e.getMessage());
}//catch
return homePhone;
}//readEmail
public String readSkype(XmlPullParser parser)
{
String skype = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "skype");
skype = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "skype");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing26", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing27", e.getMessage());
}//catch
return skype;
}//readSkype
public String readBusinessAddress(XmlPullParser parser)
{
String businessAddress = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "businessaddress");
businessAddress = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "businessaddress");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing28", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing29", e.getMessage());
}//catch
return businessAddress;
}//readBusinessAddress
public String readHomeAddress(XmlPullParser parser)
{
String homeAddress = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "homeaddress");
homeAddress = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "homeaddress");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing30", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing31", e.getMessage());
}//catch
return homeAddress;
}//readBusinessAddress
public String readOtherAddress(XmlPullParser parser)
{
String otherAddress = null;
try
{
parser.require(XmlPullParser.START_TAG, ns, "otheraddress");
otherAddress = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "otheraddress");
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing32", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing33", e.getMessage());
}//catch
return otherAddress;
}//readBusinessAddress
public void skip(XmlPullParser parser)
{
try
{
if(parser.getEventType() != XmlPullParser.START_TAG)
{
throw new IllegalStateException();
}//if
int depth = 1;
while(depth != 0)
{
switch(parser.next())
{
case XmlPullParser.END_TAG:
depth--;
break;
case XmlPullParser.START_TAG:
depth++;
break;
}//switch
}//while
}//try
catch (XmlPullParserException e)
{
Log.e("PullParsing34", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("PullParsing35", e.getMessage());
}//catch
}//skip
private String readText(XmlPullParser parser)
{
String result = "";
try
{
if(parser.next() == XmlPullParser.TEXT)
{
result = parser.getText();
parser.nextTag();
}//if
}//try
catch (XmlPullParserException e)
{
Log.e("Pull Parsing36", e.getMessage());
}//catch
catch (IOException e)
{
Log.e("Pull Parsing37", e.getMessage());
}//catch
return result;
}
public static class Entry
{
String nametitle;
String name;
String email;
String mobile;
String website;
String jobtitle;
String company;
String businessphone;
String homephone;
String skype;
String faxno;
String businessaddress;
String homeaddress;
String otheraddress;
public Entry(String nametitle, String name, String email, String mobile, String website,
String jobtitle, String company, String businessphone, String homephone,
String skype, String faxno, String businessaddress, String homeaddress,
String otheraddress)
{
this.nametitle = nametitle;
this.name = name;
this.email = email;
this.mobile = mobile;
this.website = website;
this.jobtitle = jobtitle;
this.company = company;
this.businessphone = businessphone;
this.homephone = homephone;
this.skype = skype;
this.faxno = faxno;
this.businessaddress = businessaddress;
this.homeaddress = homeaddress;
this.otheraddress = otheraddress;
}//Constructor
}//Entry class
}//PullParser
XML 文件
<menu>
<item>
<nametitle>Mrs</nametitle>
<name>Maria Sharapova</name>
<email>maria@yahoo.com</email>
<mobile>9871234561</mobile>
<website>www.maria.com</website>
<jobtitle>software developer</jobtitle>
<company>Lata Softwares Pvt Ltd</company>
<businessphone>07442323232</businessphone>
<homephone>07441212121</homephone>
<skype>marai.sharapova</skype>
<faxno>07443434343</faxno>
<businessaddress>d-2 dadwara kota rajasthan</businessaddress>
<homeaddress>d-2 dadwara kota rajasthan</homeaddress>
<otheraddress>d-2 dadwara kota rajasthan</otheraddress>
</item>
<item>
<nametitle>Ms</nametitle>
<name>Sareena Williams</name>
<email>sareena@yahoo.com</email>
<mobile>9871212121</mobile>
<website>www.sareena.com</website>
<jobtitle>tenis player</jobtitle>
<company>Tenis organisation Pvt Ltd</company>
<businessphone>074423236565</businessphone>
<homephone>07441212178</homephone>
<skype>sareena.williams</skype>
<faxno>07443434387</faxno>
<businessaddress>d-3 dadwara kota rajasthan</businessaddress>
<homeaddress>d-3 dadwara kota rajasthan</homeaddress>
<otheraddress>d-3 dadwara kota rajasthan</otheraddress>
</item>
</menu>
我在 Dropbox 中上传的这个 XML 文件，其 URL 如下：
https://dl.dropbox.com/u/85981610/user.xml
logcat详细信息如下：
07-04 13:43:58.869: D/PARSED DATA(273): Mrs
07-04 13:43:58.869: D/PARSED DATA(273): Maria Sharapova
07-04 13:43:58.890: D/AndroidRuntime(273): Shutting down VM
07-04 13:43:58.890: W/dalvikvm(273): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-04 13:43:58.969: E/AndroidRuntime(273): FATAL EXCEPTION: main
07-04 13:43:58.969: E/AndroidRuntime(273): java.lang.NullPointerException: println needs a message
07-04 13:43:58.969: E/AndroidRuntime(273): at android.util.Log.println_native(Native Method)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.util.Log.d(Log.java:122)
07-04 13:43:58.969: E/AndroidRuntime(273): at com.android.pullparsing.PullParser.readEntry(PullParser.java:188)
07-04 13:43:58.969: E/AndroidRuntime(273): at com.android.pullparsing.PullParser.readFeed(PullParser.java:76)
07-04 13:43:58.969: E/AndroidRuntime(273): at com.android.pullparsing.PullParser.parse(PullParser.java:53)
07-04 13:43:58.969: E/AndroidRuntime(273): at com.android.pullparsing.PullParsingActivity$1.onClick(PullParsingActivity.java:37)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.view.View.performClick(View.java:2408)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.view.View$PerformClick.run(View.java:8816)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.os.Handler.handleCallback(Handler.java:587)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.os.Handler.dispatchMessage(Handler.java:92)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.os.Looper.loop(Looper.java:123)
07-04 13:43:58.969: E/AndroidRuntime(273): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-04 13:43:58.969: E/AndroidRuntime(273): at java.lang.reflect.Method.invokeNative(Native Method)
07-04 13:43:58.969: E/AndroidRuntime(273): at java.lang.reflect.Method.invoke(Method.java:521)
07-04 13:43:58.969: E/AndroidRuntime(273): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-04 13:43:58.969: E/AndroidRuntime(273): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-04 13:43:58.969: E/AndroidRuntime(273): at dalvik.system.NativeStart.main(Native Method)