Member Avatar for PudingEatsPanda

Hello guys I am trying to make this RSS Android App to work but I am having some problems since I am just a beginer at this. Also sorry if the errors are not included yet, I am going to update it asap. I am downloading my eclipse since it got corrupted. :(
The following is the code I am using:

SimpleRSSReaderActivity.java

package com.example.simplerssreader;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;


import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.xmlpull.v1.XmlPullParserFactory;


import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;


public class SimpleRSSReaderActivity<List> extends ListActivity {

List headlines;
List links;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);        
 // Initializing instance variables
    headlines = new ArrayList();
    links = new ArrayList();

    try {
        URL url = new URL("");

        XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
        factory.setNamespaceAware(false);
        XmlPullParser xpp = factory.newPullParser();

            // We will get the XML from an input stream
        xpp.setInput(getInputStream(url), "UTF_8");

            /* We will parse the XML content looking for the "<title>" tag which appears inside the "<item>" tag.
             * However, we should take in consideration that the rss feed name also is enclosed in a "<title>" tag.

        boolean insideItem = false;

            // Returns the type of current event: START_TAG, END_TAG, etc..
        int eventType = xpp.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {
            if (eventType == XmlPullParser.START_TAG) {

                if (xpp.getName().equalsIgnoreCase("item")) {
                    insideItem = true;
                } else if (xpp.getName().equalsIgnoreCase("title")) {
                    if (insideItem)
                        headlines.add(xpp.nextText()); //extract the headline
                } else if (xpp.getName().equalsIgnoreCase("link")) {
                    if (insideItem)
                        links.add(xpp.nextText()); //extract the link of article
                }
            }else if(eventType==XmlPullParser.END_TAG && xpp.getName().equalsIgnoreCase("item")){
                insideItem=false;
            }

            eventType = xpp.next(); //move to next element
        }

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (XmlPullParserException e) {

Main.java

package com.example.simplerssreader;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

 public class Main extends Activity {

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >


</LinearLayout>
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  • 2 Hours Discussion Span
  • Latest Post Latest Post by Dani

Dani AI

Generated

Common problems in the pasted files explain why the app won’t run yet. As asked, include the exact LogCat stacktrace when available — the fixes below address the typical compile/runtime errors seen with that code: an incorrect class declaration/generic, missing ListActivity import, undefined helper method getInputStream(...), wrong charset string, missing INTERNET permission, doing network I/O on the UI thread, no adapter/ListView hookup, and not closing streams.

Fixes to apply (minimal, concrete):

  • Remove the stray generic from the activity declaration and import the right class:
    public class SimpleRSSReaderActivity extends ListActivity
  • Use typed collections (avoid raw List) and set an adapter so the list actually shows items:
    List<String> headlines = new ArrayList<String>();
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, headlines));
  • Ensure the layout contains a ListView with the id Android expects if you use a custom layout:
    <ListView android:id="@android:id/list" android:layout_width="match_parent" android:layout_height="match_parent" />
  • Add the permission in AndroidManifest.xml:
    <uses-permission android:name="android.permission.INTERNET" />

Networking and parsing notes:

  • Replace the undefined helper call with a proper stream from the URL (and use the correct charset string "UTF-8"), and always close the stream in finally or try-with-resources.
  • Do the fetch/parse off the main thread (AsyncTask, Executor, IntentService, etc.). Minimal pattern:
    new AsyncTask<URL,Void,List<String>>(){ protected List<String> doInBackground(URL...u){ /* openConnection(), parse */ } protected void onPostExecute(List<String> r){ setListAdapter(...); }}.execute(url);

Troubleshooting checklist: check LogCat for the exact exception (NetworkOnMainThreadException, MalformedURLException, IOException, XmlPullParserException), include full stacktrace when posting, confirm the launcher activity in AndroidManifest, and test on a device/emulator with network access.

Member Avatar for Dani

Can you please explain what errors you're experiencing?

Also, I detagged this thread from daniweb-api. I had thought you were using DaniWeb's API, but you are using PC World's.

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