Android Fragmentsコンテンツビューはまだ作成されていません

Question

すべてが正常に動作していました。しかし、私のアプリを通じていくつかのテストの後。それはクラッシュし、Logcatで私はこの "Content View Not Yet Created"を見ます。あるグーグルの後、私はonActivityCreatedに私のlistadapterを置くべきであることを知りました。私のコードはちょっと違っています。私はlazyadapterを使っていますので、助言が必要だと思います。私を助けてください。

public class AndroidFragment extends SherlockListFragment implements  ActionBar.TabListener{ 

      static final String URL = "https://xml.xml"; 
      static final String KEY_SONG = "song"; 
      static final String KEY_ID = "id"; 
      static final String KEY_TITLE = "title"; 
      static final String KEY_CAT_ARTIST = "artistcat"; 
      static final String KEY_DURATION = "duration"; 
      static final String KEY_THUMB_URL = "thumb_url"; 
      static final String KEY_BIG_URL = "big_url"; 
      static final String KEY_CAT_URL = "cat_url"; 
      static final String KEY_DESC = "cat_desc"; 
      ArrayList<HashMap<String, String>> menuItems; 
      ListAdapter adapter; 
      Context appContext; 

      @Override 
      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){ 
       appContext = inflater.getContext().getApplicationContext(); 

       new loadListView().execute(); 



      return super.onCreateView(inflater, container, savedInstanceState); 
      } 


      public class loadListView extends AsyncTask<Integer, String, String> { 

      @Override 
      protected void onPreExecute() { 
        super.onPreExecute(); 
      } 

      @Override 
      protected String doInBackground(Integer... args) { 
       // updating UI from Background Thread 
      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_SONG); 
      // 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_ID, parser.getValue(e, KEY_ID)); 
      map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE)); 
      map.put(KEY_CAT_ARTIST, parser.getValue(e, KEY_CAT_ARTIST)); 
      map.put(KEY_DURATION, parser.getValue(e, KEY_DURATION)); 
      map.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL)); 
      map.put(KEY_BIG_URL, parser.getValue(e, KEY_BIG_URL)); 
      map.put(KEY_CAT_URL, parser.getValue(e, KEY_CAT_URL)); 
      map.put(KEY_DESC, parser.getValue(e, KEY_DESC)); 
      // adding HashList to ArrayList 
      menuItems.add(map); 
      } 
      return null; 
      } 


      @Override 
      protected void onPostExecute(String args) { 

      if (getActivity() != null) { 
      adapter=new MainPageLazyAdapter(getActivity(), menuItems); 
      setListAdapter(adapter); 


      } 

      } 
      } 


      @Override 
      public void onTabSelected(Tab tab, FragmentTransaction ft) { 
      ft.add(android.R.id.content, this); 
      ft.attach(this); 
      } 

      @Override 
      public void onTabUnselected(Tab tab, FragmentTransaction ft) { 
      ft.detach(this); 

      } 

      @Override 
      public void onTabReselected(Tab tab, FragmentTransaction ft) { 
      } 

     } 

MY LOGCAT：

10-08 17:29:32.946: E/AndroidRuntime(6376): FATAL EXCEPTION: main 
10-08 17:29:32.946: E/AndroidRuntime(6376): java.lang.IllegalStateException: Content view not yet created 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.support.v4.app.ListFragment.ensureList(ListFragment.java:328) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.support.v4.app.ListFragment.getListView(ListFragment.java:222) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at in.wptrafficanalyzer.actionbarsherlocknavtab.AndroidFragment$loadListView.onPostExecute(AndroidFragment.java:108) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at in.wptrafficanalyzer.actionbarsherlocknavtab.AndroidFragment$loadListView.onPostExecute(AndroidFragment.java:1) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.os.AsyncTask.finish(AsyncTask.java:602) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.os.AsyncTask.access$600(AsyncTask.java:156) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.os.Looper.loop(Looper.java:137) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at android.app.ActivityThread.main(ActivityThread.java:4512) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at java.lang.reflect.Method.invoke(Method.java:511) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:982) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749) 
10-08 17:29:32.946: E/AndroidRuntime(6376):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

私は、これはあなたの問題を解決すべきだと思います。

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){ 
    View view = inflater.inflate(R.layout.layout, null); 
    return view //You must return your view here 
} 

@Override 
public void onResume() { 
    //onResume happens after onStart and onActivityCreate 
    new loadListView().execute(); 
    super.onResume() ; 
}