A simple RSS reader III, show details once item clicked.

Last article "A simple RSS reader II, implement with RSSFeed & RSSItem", only the titles shown in a List. Here, we are going to start another activity to show the details once any item in the list clicked.



Most of the works from the last article "A simple RSS reader II, implement with RSSFeed & RSSItem", with the changes lsited below.

Implement /res/layout/details.xml, it's the layout of the activity ShowDetails.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="RSS Details:-" />
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:id="@+id/detailstitle" />
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:id="@+id/detailsdescription" />
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:autoLink="web"
  android:id="@+id/detailslink" />
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:id="@+id/detailspubdate" />
</LinearLayout>

Implement a new Activity /src/com.exercise.AndroidRssReader/ShowDetails.java, it will be started once any item in the list clicked.

package com.exercise.AndroidRssReader;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class ShowDetails extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
 // TODO Auto-generated method stub
 super.onCreate(savedInstanceState);
 setContentView(R.layout.details);
 TextView detailsTitle = (TextView)findViewById(R.id.detailstitle);
 TextView detailsDescription = (TextView)findViewById(R.id.detailsdescription);
 TextView detailsPubdate = (TextView)findViewById(R.id.detailspubdate);
 TextView detailsLink = (TextView)findViewById(R.id.detailslink);

 Bundle bundle = this.getIntent().getExtras();
    
      detailsTitle.setText(bundle.getString("keyTitle"));
      detailsDescription.setText(bundle.getString("keyDescription"));
      detailsPubdate.setText(bundle.getString("keyPubdate"));
      detailsLink.setText(bundle.getString("keyLink"));
    
}
}

Modify /src/com.exercise.AndroidRssReader/AndroidRssReader.java to start new activity once any list item clicked.

package com.exercise.AndroidRssReader;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class AndroidRssReader extends ListActivity {

private RSSFeed myRssFeed = null;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
    
      try {
  URL rssUrl = new URL("http://www.gov.hk/en/about/rss/govhkrss.data.xml");
  SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
  SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
  XMLReader myXMLReader = mySAXParser.getXMLReader();
  RSSHandler myRSSHandler = new RSSHandler();
  myXMLReader.setContentHandler(myRSSHandler);
  InputSource myInputSource = new InputSource(rssUrl.openStream());
  myXMLReader.parse(myInputSource);
 
  myRssFeed = myRSSHandler.getFeed();
 
 } catch (MalformedURLException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 } catch (ParserConfigurationException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 } catch (SAXException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }

 if (myRssFeed!=null)
 {
  TextView feedTitle = (TextView)findViewById(R.id.feedtitle);
  TextView feedDescribtion = (TextView)findViewById(R.id.feeddescribtion);
  TextView feedPubdate = (TextView)findViewById(R.id.feedpubdate);
  TextView feedLink = (TextView)findViewById(R.id.feedlink);
  feedTitle.setText(myRssFeed.getTitle());
  feedDescribtion.setText(myRssFeed.getDescription());
  feedPubdate.setText(myRssFeed.getPubdate());
  feedLink.setText(myRssFeed.getLink());
 
  ArrayAdapter<RSSItem> adapter =
   new ArrayAdapter<RSSItem>(this,
     android.R.layout.simple_list_item_1,myRssFeed.getList());
  setListAdapter(adapter);
 
 }
  }

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
 // TODO Auto-generated method stub
 Intent intent = new Intent(this,ShowDetails.class);
 Bundle bundle = new Bundle();
 bundle.putString("keyTitle", myRssFeed.getItem(position).getTitle());
 bundle.putString("keyDescription", myRssFeed.getItem(position).getDescription());
 bundle.putString("keyLink", myRssFeed.getItem(position).getLink());
 bundle.putString("keyPubdate", myRssFeed.getItem(position).getPubdate());
 intent.putExtras(bundle);
      startActivity(intent);
}
}

Modify AndroidManifest.xml to include the new activity.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.exercise.AndroidRssReader"
    android:versionCode="1"
    android:versionName="1.0">
  <application android:icon="@drawable/icon" android:label="@string/app_name">
      <activity android:name=".AndroidRssReader"
                android:label="@string/app_name">
          <intent-filter>
              <action android:name="android.intent.action.MAIN" />
              <category android:name="android.intent.category.LAUNCHER" />
          </intent-filter>
      </activity>
 <activity android:name=".ShowDetails"></activity>
  </application>
  <uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.INTERNET" />
</manifest>

Download the files.

next:
- Apply custom adapter to ListView for RSS Reader
- A simple RSS reader IV, start browser to open the selected feed