SAX exception when reading xml from Assets

StackOverflow https://stackoverflow.com/questions/22554901

Question

Hi I am trying to read xml file which is in assets folder of my project but when it is going to read through buffer reader it throw a SAX exception, I searched everywhere to tackle this problem but failed to do so, it read some part of the xml and then exception through "End of the Document" please help me in this regard,

Given below is my source code:

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);

    }
}

And Here IS MY xml parser

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

XML file which in show in logcat,which not compelete and after this it through SAX exception "end of doucment"

 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="&quot;97&quot;">    <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
Was it helpful?

Solution

Follow these steps:

  1. Download the jar file from the following link jsonlib

  2. Paste the jar file into libs

  3. Add the following demo code:

@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();
}
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