The fundamental error is
Unable to start activity ComponentInfo{com.xetur.simplerss/com.xetur.simplerss.ListRowsActivity}: android.os.NetworkOnMainThreadException 09-11 17:20:11.601: E/AndroidRuntime(1198): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 09-11 17:20:11.601: E/AndroidRuntime(1198): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 09-11 17:20:11.601: E/AndroidRuntime(1198): at
You're trying to access the network on the main thread. Looks like you're trying to create a new Thread, but it's accessing the UI on the main thread. This will cause trouble.
The Android training class RUnning in A Background Service includes a sample app that has a robust RSS feed parser. It uses an IntentService to do the read in the background and store the results in a content provider, which is the way you should do it.