This is the first android app I'm writing for the college I work at. It's basically a thin client that reads data from an xml on the site and prints it out to a List. I've ran into a strange problem though and could use some help. The EventsListActivity reads an xml from file, places it in an Array of HashMaps, sorts it and places it into a SimpleAdapter. I'm using this exact same code for my DirectoryListActivity and it works just fine. However the EventsListActivity only displays a blank list with 1 row. That row if clicked will display the correct data, and there is only 1 row in the xml file so that's not an issue. However the TextView in the row isn't displaying anything.
I have stepped through the code and the xml is being read and stored correctly. There just seems to be a problem with the binding of the SimpleAdapter. Any tips would be greatly appreciated and feel free to give me pointers if you see some better things I could be doing in my code. Here is the needed information:
public class KCCEventsListActivity extends ListActivity {
public static final ArrayList<HashMap<String, String>> eventsList = new ArrayList<HashMap<String, String>>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.customlist);
SimpleAdapter adapter = new SimpleAdapter(KCCEventsListActivity.this, eventsList, R.layout.customrow, new String[] {"summary", "date"}, new int[] {R.id.tvHeading, R.id.tvSubheading});
if (eventsList.isEmpty()) {
getEvents();
}
KCCEventsListActivity.this.setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView lv, View v, int position, long id) {
super.onListItemClick(lv, v, position, id);
HashMap<String, String> event = eventsList.get(position);
Toast.makeText(KCCEventsListActivity.this, event.get("date"), Toast.LENGTH_LONG).show();
//Call AddtoCalendar Intent
}
protected void getEvents() {
try {
URL url = new URL(getString(R.string.KccEventsAddress));
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("EventItem");
for (int i=0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
Element element = (Element)node;
HashMap<String, String> entry = new HashMap<String, String>();
NodeList titleList = element.getElementsByTagName("Summary");
Element titleElement = (Element)titleList.item(0);
titleList = titleElement.getChildNodes();
entry.put("summary", titleList.item(0).getNodeValue());
NodeList dateList = element.getElementsByTagName("StartTime");
Element dateElement = (Element)dateList.item(0);
dateList = dateElement.getChildNodes();
entry.put("date", dateList.item(0).getNodeValue());
NodeList orderList = element.getElementsByTagName("Seconds");
Element orderElement = (Element)orderList.item(0);
orderList = orderElement.getChildNodes();
entry.put("order", orderList.item(0).getNodeValue());
eventsList.add(entry);
}
Comparator<HashMap<String, String>> comparator = new Comparator<HashMap<String, String>>() {
public int compare(HashMap<String, String> object1, HashMap<String, String> object2)
{
return object1.get("order").compareToIgnoreCase(object2.get("order"));
}
};
Collections.sort(eventsList, comparator);
} catch (Exception e) {
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
CUSTOMLIST.XML
<?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"
>
<ListView android:id="@id/android:list"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"></ListView>
<TextView android:id="@id/android:empty" android:layout_width="match_parent" android:layout_height="match_parent" android:text="No data" />
</LinearLayout>
CUSTOMROW.XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView android:id="@+id/tvHeading" android:layout_width="wrap_content" android:layout_height="26dip" android:layout_alignParentTop="true" android:textSize="20sp" />
<TextView android:id="@+id/tvSubheading" android:layout_width="wrap_content" android:layout_height="22dip" android:layout_below="@id/tvHeading" android:textSize="16sp" />
</RelativeLayout>
After going over the code several times I finally rewrote the web service to print out a different style of xml. This made the code work perfectly. For some reason the previously used xml file was causing the display to not work properly. I wish I had more info on why this happened. Thanks for the answers.