Android Java: Remove first two entries from Google News feed in SimpleRssReader

Category: AndroidOS
Hits: 20919
What?
A quick article on how to remove the first two entries from a RSS feed produced by a bunch of java files collectively known as "SimpleRssReader.

Why?
The original file reads of a feed from PCWorld.com. I adapted this to read a google news rss feed and the first two entries are "<query> - Google News", everytime. This article documents what I did to fix it.

How?
Basic to some but I'm new to the game. I'm trying to remove the first two entries from a news feed from a Google News feed.

Modifying the strings can be done in the PcWorldRssParser.java (without it crashing the app). The gist is to check for a description (the first two items do not have one). The following will also return a publishing date:

Find the List function in:
PcWorldRssParser.java (readFeed) and replace with
copyraw 
private List<RssItem> readFeed(XmlPullParser parser) throws XmlPullParserException, IOException {
        parser.require(XmlPullParser.START_TAG, null, "rss");
        String title = null;
        String link = null;
        String date = null;
        String desc = null;
        List<RssItem> items = new ArrayList<RssItem>();
        while (parser.next() != XmlPullParser.END_DOCUMENT) {
            if (parser.getEventType() != XmlPullParser.START_TAG) {
                continue;
            }
            String name = parser.getName();
            if (name.equals("title")) {
                title = readTitle(parser);
            } else if (name.equals("link")) {
                link = readLink(parser);
            } else if (name.equals("pubDate")) {
                date = readDate(parser);
            } else if (name.equals("description")) {
                desc = readDesc(parser);
            }
                if (title != null && link != null && desc != null) {

                    RssItem item = new RssItem(title, link, date, desc);
                    items.add(item);
                    title = null;
                    link = null;
                    date = null;
                    desc = null;
                }

        }
        return items;
    }

    private String readDate(XmlPullParser parser) throws XmlPullParserException, IOException {
        parser.require(XmlPullParser.START_TAG, ns, "pubDate");
        String date = readText(parser);
        parser.require(XmlPullParser.END_TAG, ns, "pubDate");
        return date;
    }
    private String readDesc(XmlPullParser parser) throws XmlPullParserException, IOException {
        parser.require(XmlPullParser.START_TAG, ns, "description");
        String desc = readText(parser);
        parser.require(XmlPullParser.END_TAG, ns, "description");
        return desc;
    }
  1.  private List<RssItem> readFeed(XmlPullParser parser) throws XmlPullParserException, IOException { 
  2.          parser.require(XmlPullParser.START_TAG, null, "rss"); 
  3.          String title = null; 
  4.          String link = null; 
  5.          String date = null; 
  6.          String desc = null; 
  7.          List<RssItem> items = new ArrayList<RssItem>(); 
  8.          while (parser.next() != XmlPullParser.END_DOCUMENT) { 
  9.              if (parser.getEventType() != XmlPullParser.START_TAG) { 
  10.                  continue; 
  11.              } 
  12.              String name = parser.getName(); 
  13.              if (name.equals("title")) { 
  14.                  title = readTitle(parser); 
  15.              } else if (name.equals("link")) { 
  16.                  link = readLink(parser); 
  17.              } else if (name.equals("pubDate")) { 
  18.                  date = readDate(parser); 
  19.              } else if (name.equals("description")) { 
  20.                  desc = readDesc(parser); 
  21.              } 
  22.                  if (title != null && link != null && desc != null) { 
  23.   
  24.                      RssItem item = new RssItem(title, link, date, desc); 
  25.                      items.add(item); 
  26.                      title = null; 
  27.                      link = null; 
  28.                      date = null; 
  29.                      desc = null; 
  30.                  } 
  31.   
  32.          } 
  33.          return items; 
  34.      } 
  35.   
  36.      private String readDate(XmlPullParser parser) throws XmlPullParserException, IOException { 
  37.          parser.require(XmlPullParser.START_TAG, ns, "pubDate"); 
  38.          String date = readText(parser); 
  39.          parser.require(XmlPullParser.END_TAG, ns, "pubDate"); 
  40.          return date; 
  41.      } 
  42.      private String readDesc(XmlPullParser parser) throws XmlPullParserException, IOException { 
  43.          parser.require(XmlPullParser.START_TAG, ns, "description"); 
  44.          String desc = readText(parser); 
  45.          parser.require(XmlPullParser.END_TAG, ns, "description"); 
  46.          return desc; 
  47.      } 


Modify for date and description
RssAdapter.java (getView)
copyraw 
@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = View.inflate(context, R.layout.rss_item, null);
            holder = new ViewHolder();
            holder.newsItemTitle = (TextView) convertView.findViewById(R.id.newsItemTitle);
            holder.newsItemDateD = (TextView) convertView.findViewById(R.id.newsItemDateD);
            holder.newsItemDateM = (TextView) convertView.findViewById(R.id.newsItemDateM);
            holder.newsItemDesc = (TextView) convertView.findViewById(R.id.newsItemDesc);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.newsItemTitle.setText(items.get(position).getTitle());
        holder.newsItemDateD.setText(items.get(position).getDate().substring(5, 7));
        holder.newsItemDateM.setText(items.get(position).getDate().substring(8, 11).toUpperCase());
        holder.newsItemDesc.setText(items.get(position).getDesc());
        return convertView;
    }

    static class ViewHolder {
        TextView newsItemTitle;
        TextView newsItemDateD;
        TextView newsItemDateM;
        TextView newsItemDesc;
    }
  1.  @Override 
  2.      public View getView(int position, View convertView, ViewGroup parent) { 
  3.          ViewHolder holder; 
  4.          if (convertView == null) { 
  5.              convertView = View.inflate(context, R.layout.rss_item, null); 
  6.              holder = new ViewHolder(); 
  7.              holder.newsItemTitle = (TextView) convertView.findViewById(R.id.newsItemTitle); 
  8.              holder.newsItemDateD = (TextView) convertView.findViewById(R.id.newsItemDateD); 
  9.              holder.newsItemDateM = (TextView) convertView.findViewById(R.id.newsItemDateM); 
  10.              holder.newsItemDesc = (TextView) convertView.findViewById(R.id.newsItemDesc); 
  11.              convertView.setTag(holder); 
  12.          } else { 
  13.              holder = (ViewHolder) convertView.getTag(); 
  14.          } 
  15.          holder.newsItemTitle.setText(items.get(position).getTitle()); 
  16.          holder.newsItemDateD.setText(items.get(position).getDate().substring(5, 7)); 
  17.          holder.newsItemDateM.setText(items.get(position).getDate().substring(8, 11).toUpperCase()); 
  18.          holder.newsItemDesc.setText(items.get(position).getDesc()); 
  19.          return convertView; 
  20.      } 
  21.   
  22.      static class ViewHolder { 
  23.          TextView newsItemTitle; 
  24.          TextView newsItemDateD; 
  25.          TextView newsItemDateM; 
  26.          TextView newsItemDesc; 
  27.      } 

RssItem.java
copyraw 
public class RssItem {

    private String title;
    private String link;
    private String date;
    private String desc;

    public RssItem(String title, String link, String date, String desc) {
            this.title = title;
            this.link = link;
            this.date = date;
            this.desc = desc;
    }

    public String getTitle() {
        return title;
    }

    public String getLink() {
        return link;
    }

    public String getDate() {
        return date;
    }

    public String getDesc() {
        return desc;
    }

}
  1.  public class RssItem { 
  2.   
  3.      private String title; 
  4.      private String link; 
  5.      private String date; 
  6.      private String desc; 
  7.   
  8.      public RssItem(String title, String link, String date, String desc) { 
  9.              this.title = title; 
  10.              this.link = link; 
  11.              this.date = date; 
  12.              this.desc = desc; 
  13.      } 
  14.   
  15.      public String getTitle() { 
  16.          return title; 
  17.      } 
  18.   
  19.      public String getLink() { 
  20.          return link; 
  21.      } 
  22.   
  23.      public String getDate() { 
  24.          return date; 
  25.      } 
  26.   
  27.      public String getDesc() { 
  28.          return desc; 
  29.      } 
  30.   
  31.  } 


My rss_item.xml (reduced down):
copyraw 
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/newsItemDateD"
        android:maxLines="1"
        android:gravity="center|bottom"
        android:layout_height="50dip"
        android:layout_width="70dip"
        android:textSize="30sp" />

    <TextView
        android:id="@+id/newsItemDateM"
        android:maxLines="1"
        android:gravity="center|top"
        android:layout_height="30dip"
        android:layout_width="70dip"
        android:layout_below="@+id/newsItemDateD" />

    <TextView
        android:id="@+id/newsItemTitle"
        android:layout_toRightOf="@+id/newsItemDateD"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/newsItemDesc"
        android:layout_alignLeft="@+id/newsItemTitle"
        android:layout_below="@+id/newsItemTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>
  1.  <?xml version="1.0" encoding="utf-8"?> 
  2.  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  3.      android:layout_width="match_parent" 
  4.      android:layout_height="wrap_content" 
  5.      android:orientation="vertical"> 
  6.   
  7.      <TextView 
  8.          android:id="@+id/newsItemDateD" 
  9.          android:maxLines="1" 
  10.          android:gravity="center|bottom" 
  11.          android:layout_height="50dip" 
  12.          android:layout_width="70dip" 
  13.          android:textSize="30sp" /> 
  14.   
  15.      <TextView 
  16.          android:id="@+id/newsItemDateM" 
  17.          android:maxLines="1" 
  18.          android:gravity="center|top" 
  19.          android:layout_height="30dip" 
  20.          android:layout_width="70dip" 
  21.          android:layout_below="@+id/newsItemDateD" /> 
  22.   
  23.      <TextView 
  24.          android:id="@+id/newsItemTitle" 
  25.          android:layout_toRightOf="@+id/newsItemDateD" 
  26.          android:layout_width="wrap_content" 
  27.          android:layout_height="wrap_content" /> 
  28.   
  29.      <TextView 
  30.          android:id="@+id/newsItemDesc" 
  31.          android:layout_alignLeft="@+id/newsItemTitle" 
  32.          android:layout_below="@+id/newsItemTitle" 
  33.          android:layout_width="wrap_content" 
  34.          android:layout_height="wrap_content" /> 
  35.   
  36.  </RelativeLayout> 


Sources:
Category: AndroidOS :: Article: 590

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