我有问题ListFragment。当我使用片段开始我的活动时，我的应用程序崩溃了。我使用选项卡主机，我想显示 XML 文件中的元素。
import java.util.ArrayList;
import java.util.HashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import com.poki.apeiron.XMLParser;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class Novosti extends ListFragment
{
static final String URL = "http://apeiron.comyr.com/fit.xml";
// XML node keys
static final String KEY_NOVOST = "novost"; // parent node
static final String KEY_NASLOV = "naslov";
static final String KEY_DATUM = "datum";
static final String KEY_TEXT = "text";
static final String KEY_LINK = "link";
static final String KEY_LINK1 = "link1";
@Override
public View onCreateView( LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState )
{ View view = inflater.inflate(R.layout.activity_novosti,
container, false);
//String faks= (String) getActivity().getIntent().getSerializableExtra("Faks");
//Toast.makeText(fa, faks, Toast.LENGTH_SHORT).show();
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_NOVOST);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_NASLOV, parser.getValue(e, KEY_NASLOV));
map.put(KEY_DATUM, "Datum: " + parser.getValue(e, KEY_DATUM));
map.put(KEY_TEXT, "Novost: "+parser.getValue(e, KEY_TEXT));
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this.getActivity(), menuItems,R.layout.list_row,new String[] { KEY_NASLOV, KEY_DATUM, KEY_DATUM }, new int[] {
R.id.naslov, R.id.datum, R.id.novost });
setListAdapter(adapter);
//ListView listView = (ListView)view.findViewById(R.id.ListViewId);
//listView.setAdapter((ListAdapter) new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items));
// selecting single ListView item
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String naslov = ((TextView) view.findViewById(R.id.naslov)).getText().toString();
String datum = ((TextView) view.findViewById(R.id.datum)).getText().toString();
String text = ((TextView) view.findViewById(R.id.novost)).getText().toString();
//Context anAct = getActivity().getApplicationContext();
// Toast.makeText(anAct, "About!", Toast.LENGTH_SHORT).show();
// Starting new intent
Intent in = new Intent(getActivity(),Novost.class);
in.putExtra(KEY_NASLOV, naslov);
in.putExtra(KEY_DATUM, datum);
in.putExtra(KEY_TEXT, text);
in.putExtra("link", KEY_LINK);
in.putExtra("link1", KEY_LINK1);
startActivity(in);
}
});
return view;
}
}
如何解决？
这是来自 logcat 的日志：
03-12 00:34:40.579: E/AndroidRuntime(1984): FATAL EXCEPTION: main
03-12 00:34:40.579: E/AndroidRuntime(1984): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.poki.apeiron/com.poki.apeiron.Prikaz}: java.lang.ClassCastException: com.poki.apeiron.Novosti cannot be cast to android.app.Fragment
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.os.Handler.dispatchMessage(Handler.java:99)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.os.Looper.loop(Looper.java:137)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.ActivityThread.main(ActivityThread.java:5039)
03-12 00:34:40.579: E/AndroidRuntime(1984): at java.lang.reflect.Method.invokeNative(Native Method)
03-12 00:34:40.579: E/AndroidRuntime(1984): at java.lang.reflect.Method.invoke(Method.java:511)
03-12 00:34:40.579: E/AndroidRuntime(1984): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-12 00:34:40.579: E/AndroidRuntime(1984): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-12 00:34:40.579: E/AndroidRuntime(1984): at dalvik.system.NativeStart.main(Native Method)
03-12 00:34:40.579: E/AndroidRuntime(1984): Caused by: java.lang.ClassCastException: com.poki.apeiron.Novosti cannot be cast to android.app.Fragment
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.Fragment.instantiate(Fragment.java:585)
03-12 00:34:40.579: E/AndroidRuntime(1984): at android.app.Fragment.instantiate(Fragment.java:560)