Question

I already posted this issue but had edited it so many times I thought I would just post again with all the code and the eclipse package download.

I am not getting any errors/problems in eclipse after I changed class extends Activity to class extends ListActivity.

If anyone see my issues that may be forcing the app to close please let me know. THANKS!

ECLIPSE PROJECT DOWNLOAD

patriotsar.java

package com.patriotsar;




import java.util.ArrayList;
import java.util.HashMap;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import com.patriotsar.XMLfunctions;


import android.app.ListActivity;

import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;









public class patriosar extends ListActivity {

    private Button goButton;
    private Button quoteButton;

    String url = "http://www.patriotsar.com";
    Intent i = new Intent(Intent.ACTION_VIEW);
    Uri u = Uri.parse(url);
    Context context = this;



    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);



        goButton = (Button)findViewById(R.id.goButton);
        quoteButton = (Button)findViewById(R.id.quoteButton);

        goButton.setOnClickListener(new OnClickListener() {         
            @Override
            public void onClick(View v){
                try {
                      // Start the activity
                        i.setData(u);
                      startActivity(i);
                    } catch (ActivityNotFoundException e) {
                      // Raise on activity not found
                      Toast.makeText(context, "Browser not found.", Toast.LENGTH_SHORT);
                    }
                  } 
        });

        quoteButton.setOnClickListener(new OnClickListener() {         
            @Override
            public void onClick(View v){
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();


                String xml = XMLfunctions.getXML();
                Document doc = XMLfunctions.XMLfromString(xml);

                int numResults = XMLfunctions.numResults(doc);

                if((numResults <= 0)){
                    Toast.makeText(patriosar.this, "Geen resultaten gevonden", Toast.LENGTH_LONG).show();  
                    finish();
                }

                NodeList nodes = doc.getElementsByTagName("result");

                for (int i = 0; i < nodes.getLength(); i++) {                           
                    HashMap<String, String> map = new HashMap<String, String>();    

                    Element e = (Element)nodes.item(i);
                    map.put("id", XMLfunctions.getValue(e, "id"));
                    map.put("name", "Naam:" + XMLfunctions.getValue(e, "name"));
                    map.put("Score", "Score: " + XMLfunctions.getValue(e, "score"));
                    mylist.add(map);            
                }       
//               
                ListAdapter adapter = new SimpleAdapter(patriosar.this, mylist , R.layout.main, 
                                new String[] { "name", "Score" }, 
                                new int[] { R.id.item_title, R.id.item_subtitle });

                setListAdapter(adapter);

                final ListView lv = getListView();
                lv.setTextFilterEnabled(true);  
                lv.setOnItemClickListener(new OnItemClickListener() {
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {              
                        @SuppressWarnings("unchecked")
                        HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);                   
                        Toast.makeText(patriosar.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_LONG).show(); 

                    }
                });



                }

         });

     }
    }

XMLfunctions.java

 package com.patriotsar;

import java.io.IOException;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;


public class XMLfunctions {

    public final static Document XMLfromString(String xml){

        Document doc = null;

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        try {

            DocumentBuilder db = dbf.newDocumentBuilder();

            InputSource is = new InputSource();
            is.setCharacterStream(new StringReader(xml));
            doc = db.parse(is); 

        } catch (ParserConfigurationException e) {
            System.out.println("XML parse error: " + e.getMessage());
            return null;
        } catch (SAXException e) {
            System.out.println("Wrong XML file structure: " + e.getMessage());
            return null;
        } catch (IOException e) {
            System.out.println("I/O exeption: " + e.getMessage());
            return null;
        }

        return doc;

    }

    /** Returns element value
      * @param elem element (it is XML tag)
      * @return Element value otherwise empty String
      */
     public final static String getElementValue( Node elem ) {
         Node kid;
         if( elem != null){
             if (elem.hasChildNodes()){
                 for( kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling() ){
                     if( kid.getNodeType() == Node.TEXT_NODE  ){
                         return kid.getNodeValue();
                     }
                 }
             }
         }
         return "";
     }

     public static String getXML(){  
            String line = null;

            try {

                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost("http://p-xr.com/xml");

                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();
                line = EntityUtils.toString(httpEntity);

            } catch (UnsupportedEncodingException e) {
                line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
            } catch (MalformedURLException e) {
                line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
            } catch (IOException e) {
                line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
            }

            return line;

    }

    public static int numResults(Document doc){     
        Node results = doc.getDocumentElement();
        int res = -1;

        try{
            res = Integer.valueOf(results.getAttributes().getNamedItem("count").getNodeValue());
        }catch(Exception e ){
            res = -1;
        }

        return res;
    }

    public static String getValue(Element item, String str) {       
        NodeList n = item.getElementsByTagName(str);        
        return XMLfunctions.getElementValue(n.item(0));
    }
}

ListPlaceholder.xml:

    <ListView
        android:id="@id/android:list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:drawSelectorOnTop="false" />

    <TextView
        android:id="@id/android:empty"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="No data"/>

</LinearLayout>

main.xml:

<?xml version="1.0" encoding="utf-8"?>

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/bgimage2"> 
    >

<Button
android:id="@+id/quoteButton"
android:layout_width="150px"
android:layout_height="wrap_content"
android:text="@string/start"
android:layout_x="80px"
android:layout_y="21px"
>
</Button>

<Button
android:id="@+id/goButton"
android:layout_width="150px"
android:layout_height="wrap_content"
android:text="@string/subscribe"
android:layout_x="80px"
android:layout_y="74px"
>
</Button>

<TextView
  android:id="@+id/textview"
  android:layout_width="300px"
  android:layout_height="fill_parent"
  android:text="@string/intro"
  android:layout_y="300px"
  android:layout_x="20px"
  android:textColor="#ffffff"
  />

  <TextView  
    android:id="@+id/item_title"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:padding="2dp"
    android:textSize="20dp" />
    <TextView  
    android:id="@+id/item_subtitle"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:padding="2dp"
    android:textSize="13dp" />
</AbsoluteLayout>

Android Manifest file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.patriotsar"
      android:versionCode="1"
      android:versionName="1.0">
 <uses-sdk android:minSdkVersion="3" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".patriosar"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>

    <uses-permission android:name="android.permission.INTERNET" />

</manifest>

Answer 1

You’re extending ListActivity. The layout that you use in setContentView() needs to have a ListView with the id @android:id/list.

Edit

Also, AbsoluteLayouts are deprecated. You should not use them. However, this isn’t causing your app to force close.