このフィードアドレスを使用してオンラインで見つけたチュートリアルを実行しようとしています：http：//feeds.feedburner.com/TheTechnologyEdge
他のRSSフィードを使用しているときはプログラムを問題なく実行できますが、特に上記のフィードが必要です。解決策は比較的簡単だと思いますが、なぜこのアドレスが機能しないのか理解できないようですが、他のアドレスは機能します。以下は私が使用しているコードです。
public class SolsticeRSSReaderActivity extends ListActivity
{{
@SuppressWarnings("rawtypes")
private List headlines;
@SuppressWarnings("rawtypes")
private List links;
/** Called when the activity is first created. */
@SuppressWarnings(
{ "unchecked", "rawtypes" })
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
headlines = new ArrayList();
links = new ArrayList();
try
{
URL url = new URL("http://feeds2.feedburner.com/TheTechnologyEdge");
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. As we know, every feed begins with these lines:
* "<channel><title>Feed_Name</title>...." so we should skip the
* "<title>" tag which is a child of "<channel>" tag, and take in
* consideration only "<title>" tag which is a child of "<item>"
*
* In order to achieve this, we will make use of a boolean variable.
*/
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)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
// Binding data
ArrayAdapter adapter = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, headlines);
setListAdapter(adapter);
}
/*
* take as an argument the feed url, and returns the input stream
*/
public InputStream getInputStream(URL url)
{
try
{
return url.openConnection().getInputStream();
}
catch (IOException e)
{
return null;
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id)
{
Uri uri = Uri.parse(links.get(position) + "");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
}
Atomの問題を修正した後、リスナーを実装しようとすると、このエラーが発生します。デバッグで少し追跡しましたが、URI変数がnullであり、これをRSSフィードとして使用していたときのようにhtmlが含まれていないようです。
10-15 20:10:32.445: E/AndroidRuntime(17621): FATAL EXCEPTION: main
10-15 20:10:32.445: E/AndroidRuntime(17621): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat= }
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1536)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1388)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.app.Activity.startActivityForResult(Activity.java:3195)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.app.Activity.startActivity(Activity.java:3302)
10-15 20:10:32.445: E/AndroidRuntime(17621): at bmjohns.solstice.SolsticeRSSReaderActivity.onListItemClick(SolsticeRSSReaderActivity.java:142)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.app.ListActivity$2.onItemClick(ListActivity.java:319)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.widget.AdapterView.performItemClick(AdapterView.java:292)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.widget.AbsListView.performItemClick(AbsListView.java:1366)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2995)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.widget.AbsListView$1.run(AbsListView.java:3790)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.os.Handler.handleCallback(Handler.java:605)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.os.Handler.dispatchMessage(Handler.java:92)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.os.Looper.loop(Looper.java:137)
10-15 20:10:32.445: E/AndroidRuntime(17621): at android.app.ActivityThread.main(ActivityThread.java:4514)
10-15 20:10:32.445: E/AndroidRuntime(17621): at java.lang.reflect.Method.invokeNative(Native Method)
10-15 20:10:32.445: E/AndroidRuntime(17621): at java.lang.reflect.Method.invoke(Method.java:511)
10-15 20:10:32.445: E/AndroidRuntime(17621): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
10-15 20:10:32.445: E/AndroidRuntime(17621): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
10-15 20:10:32.445: E/AndroidRuntime(17621): at dalvik.system.NativeStart.main(Native Method)