您好我正在尝试读取我的项目的资源文件夹中的xml文件，但是当它要通过缓冲区读取器读取时会抛出一个SAX异常，我到处搜索以解决这个问题但是没有这样做，它读了xml的某些部分然后通过“文档的结尾”例外，请帮助我这方面，
以下是我的源代码：
MAIN Activty
public class MainActivity extends ListActivity {
static final String KEY_TITLE = "d:Title"; // parent node
static final String KEY_CREATIONDATE = "d:Created";
static final String KEY_DESC = "d:Introduction";
static final String KEY_CONTENT = "entry";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
InputStream in = null;
AssetManager assetManager = this.getAssets();
try {
in = assetManager.open("XMLFile.xml");
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
BufferedReader reader = new BufferedReader (new InputStreamReader(in),8);
StringBuilder xml1 = new StringBuilder();
String cursor;
try {
while ( (cursor = reader.readLine()) != null){
xml1.append(cursor);
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String xml = xml1.toString();
Log.d("XML", xml);
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
XmlParser parser = new XmlParser();
//String xml = parser.getXmlFromUrl(URL); // getting XML
Document doc = parser.getDomElement(in); // getting DOM element
Log.d("seen1","seen1");
NodeList nl = doc.getElementsByTagName(KEY_CONTENT);
Log.d("seen1","seen2");
// looping through all item nodes <content>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
map.put(KEY_CREATIONDATE, parser.getValue(e, KEY_CREATIONDATE));
map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_feed,
new String[] { KEY_TITLE, KEY_CREATIONDATE, KEY_DESC }, new int[] {
R.id.Title, R.id.creationDate , R.id.desciption });
setListAdapter(adapter);
}
}
这是我的xml解析器
public class XmlParser {
// constructor
public XmlParser() {
}
BufferedReader reader;
/**
* Getting XML DOM element
* @param XML string
* */
public Document getDomElement(InputStream in){
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
reader = new BufferedReader( new InputStreamReader (in, "UTF-8" ),8);
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(reader);
doc = db.parse(is);
} catch (ParserConfigurationException e) {
Log.e("Error1: ", e.getMessage());
return null;
} catch (SAXException e) {
Log.e("Error2: ", e.getMessage());
return null;
} catch (IOException e) {
Log.e("Error3: ", e.getMessage());
return null;
}
return doc;
}
/** Getting node value
* @param elem element
*/
public final String getElementValue( Node elem ) {
Node child;
if( elem != null){
if (elem.hasChildNodes()){
for( child = elem.getFirstChild(); child != null; child = child.getNextSibling() ){
if( child.getNodeType() == Node.TEXT_NODE ){
return child.getNodeValue();
}
}
}
}
return "";
}
/**
* Getting node value
* @param Element node
* @param key string
* */
public String getValue(Element item, String str) {
NodeList n = item.getElementsByTagName(str);
return this.getElementValue(n.item(0));
}
}
LOG CAT：
03-21 14:17:59.375: E/Error2:(27301): Unexpected end of document
03-21 14:17:59.375: D/seen1(27301): seen1
03-21 14:17:59.375: D/AndroidRuntime(27301): Shutting down VM
03-21 14:17:59.375: W/dalvikvm(27301): threadid=1: thread exiting with uncaught exception (group=0x4001d578)
03-21 14:17:59.445: E/AndroidRuntime(27301): FATAL EXCEPTION: main
03-21 14:17:59.445: E/AndroidRuntime(27301): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.webpreneur/com.example.webpreneur.MainActivity}: java.lang.NullPointerException
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1659)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.ActivityThread.access$1500(ActivityThread.java:121)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.os.Looper.loop(Looper.java:138)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.ActivityThread.main(ActivityThread.java:3701)
03-21 14:17:59.445: E/AndroidRuntime(27301): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 14:17:59.445: E/AndroidRuntime(27301): at java.lang.reflect.Method.invoke(Method.java:507)
03-21 14:17:59.445: E/AndroidRuntime(27301): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
03-21 14:17:59.445: E/AndroidRuntime(27301): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)
03-21 14:17:59.445: E/AndroidRuntime(27301): at dalvik.system.NativeStart.main(Native Method)
03-21 14:17:59.445: E/AndroidRuntime(27301): Caused by: java.lang.NullPointerException
03-21 14:17:59.445: E/AndroidRuntime(27301): at com.example.webpreneur.MainActivity.onCreate(MainActivity.java:74)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-21 14:17:59.445: E/AndroidRuntime(27301): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623)
03-21 14:17:59.445: E/AndroidRuntime(27301): ... 11 more
在logcat中显示的XML文件，在此之后不通过SAX异常“doucment结束”
03-21 14:17:59.295: D/XML(27301): <?xml version="1.0" encoding="utf-8"?><feed xml:base="https://portal.wow2.telenor.com/global/newscentre/_api/" xmlns="http://www.w3.org/2005/Atom" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml"> <id>032acc78-4645-416d-8f57-69f9de340d9e</id> <title /> <updated>2014-03-20T06:20:12Z</updated> <entry m:etag=""97""> <id>bd4e2024-d7dd-4c09-bfdc-0364d88c9b35</id> <category term="SP.Data.PagesItem" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <link rel="edit" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/FirstUniqueAncestorSecurableObject" type="application/atom+xml;type=entry" title="FirstUniqueAncestorSecurableObject" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/FirstUniqueAncestorSecurableObject" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/RoleAssignments" type="application/atom+xml;type=feed" title="RoleAssignments" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/RoleAssignments" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/AttachmentFiles" type="application/atom+xml;type=feed" title="AttachmentFiles" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/AttachmentFiles" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/ContentType" type="application/atom+xml;type=entry" title="ContentType" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/ContentType" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/FieldValuesAsHtml" type="application/atom+xml;type=entry" title="FieldValuesAsHtml" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/FieldValuesAsHtml" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/FieldValuesAsText" type="application/atom+xml;type=entry" title="FieldValuesAsText" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/FieldValuesAsText" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/FieldValuesForEdit" type="application/atom+xml;type=entry" title="FieldValuesForEdit" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/FieldValuesForEdit" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/File" type="application/atom+xml;type=entry" title="File" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/File" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Folder" type="application/atom+xml;type=entry" title="Folder" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/Folder" /> <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/ParentList" type="application/atom+xml;type=entry" title="ParentList" href="Web/Lists(guid'b1b97552-232e-46e3-b9ec-f864a85f7177')/Items(1)/ParentList" /> <title /> <updated>2014-03-20T06:20:12Z</updated> <author> <name /> </author> <content type="application/xml"> <m:properties> <d:FileSystemObjectType m:type="Edm.Int32">0</d:FileSystemObjectType> <d:Id m:type="Edm.Int32">1</d:Id> <d:ContentTypeId>0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF3900242457EFB8B24247815D688C526CD44D00C5D7502BB1BE4006888BDEE5E78E104B00A287E6D310B04CEF9229EAFF95D33A5600CBA1EC286E8DFD469D11D1225435F896</d:ContentTypeId> <d:OData__ModerationComments m:null="true" /> <d:Title>News Center</d:Title> <d:OData__dlc_DocId>67XPVZAHCTHM-7-1</d:OData__dlc_DocId> <d:OData__dlc_DocIdUrl m:type="SP.FieldUrlValue"> <d:Description>67XPVZAHCTHM-7-1</d:Description> <d:Url>https://portal.wow2.telenor.com/global/newscentre/_layouts/15/DocId
03-21 14:17:59.345: D/dalvikvm(27301): GC_CONCURRENT freed <1K, 44% free 8831K/15559K, external 2058K/2129K, paused 2ms+2ms
03-21 14:17:59.375: E/Error2:(27301): Unexpected end of document
03-21 14:17:59.375: D/seen1(27301): seen1
答案 0 :(得分：1)
请按照以下步骤操作：
从以下链接jsonlib
将jar文件粘贴到libs
添加以下演示代码：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String xmldata = null;
try {
xmldata = convertStreamToString(getAssets().open("XMLFILENAME"));
} catch (IOException e1) {
e1.printStackTrace();
} catch (Exception e1) {
e1.printStackTrace();
}
JSONObject jsonObj = null;
try {
jsonObj = XML.toJSONObject(xmldata);
} catch (JSONException e) {
Log.e("JSON exception", e.getMessage());
e.printStackTrace();
}
Log.d("XML", xmldata);
Log.d("JSON", jsonObj.toString());
}
public static String convertStreamToString(InputStream is) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
reader.close();
return sb.toString();
}