ListFragment error：內容視圖尚未創建

Question

我有這個消息在我的listFragment錯誤，我已經嘗試了一些解決方案在其他議題中提出了關於同一問題，但它仍然無法正常工作。我沒有在第一時間，但片段之間的一些導航後得到的錯誤.. 以下是錯誤：

java.lang.IllegalStateException: Content view not yet created 
     at android.support.v4.app.ListFragment.ensureList(ListFragment.java:328) 
     at android.support.v4.app.ListFragment.getListView(ListFragment.java:222) 
     at com.rajaapp.ui.InboxFragment$2$1.done(InboxFragment.java:136) 
     at com.rajaapp.ui.InboxFragment$2$1.done(InboxFragment.java:121) 
     at com.parse.ParseTaskUtils$2$1.run(ParseTaskUtils.java:107) 
     at android.os.Handler.handleCallback(Handler.java:733) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:157) 
     at android.app.ActivityThread.main(ActivityThread.java:5356) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:515) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081) 
     at dalvik.system.NativeStart.main(Native Method) 

這裏是片段代碼：

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.fragment_inbox, container, false); 
    fab = (FloatingActionButton) rootView.findViewById(R.id.fab); 
    fab.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
      builder.setItems(R.array.camera_choices,mDialogListener); 
      AlertDialog dialog = builder.create(); 
      dialog.show(); 
     } 
    }); 
    mSwipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipeRefreshLayout); 
    mSwipeRefreshLayout.setOnRefreshListener(mOnRefreshListener); 
    mSwipeRefreshLayout.setColorSchemeResources(
      R.color.swipeRefresh1, 
      R.color.swipeRefresh2, 
      R.color.swipeRefresh3, 
      R.color.swipeRefresh4 
    ); 

    return rootView; 
} 


@Override 
public void onActivityCreated (Bundle savedInstanceState) { 
    super.onActivityCreated(savedInstanceState); 
    mprogressBar = (ProgressBar) getView().findViewById(R.id.progressBar); 
    fab.attachToListView(getListView()); 
    retrieveMessages(); 
} 

private void retrieveMessages() { 
    mAbonnementsRelation = ParseUser.getCurrentUser().getRelation(ParseConstants.KEY_ABONNEMENTS_RELATION); 
    mAbonnementsRelation.getQuery().findInBackground(new FindCallback<ParseUser>() { 
     @Override 
     public void done(List<ParseUser> abonnes, ParseException e) { 
      if(e==null){ 
       int i = 0; 
       for (ParseUser abonne : abonnes) { 
        AbonnesIds.add(abonne.getObjectId()); 
        i++; 
       } 
       ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(ParseConstants.CLASS_MESSAGES); 
       query.whereContainedIn(ParseConstants.KEY_SENDER_ID, AbonnesIds); 
       query.addDescendingOrder(ParseConstants.KEY_CREATED_AT); 
       if (!mSwipeRefreshLayout.isRefreshing()) { 
        mprogressBar.setVisibility(View.VISIBLE); 
       } 
       query.findInBackground(new FindCallback<ParseObject>() { 
        @Override 
        public void done(List<ParseObject> messages, ParseException e) { 
         mprogressBar.setVisibility(View.INVISIBLE); 
         if (mSwipeRefreshLayout.isRefreshing()) { 
          mSwipeRefreshLayout.setRefreshing(false); 
         } 
         if (e == null) { 
          mMessages = messages; 
          String[] usernames = new String[mMessages.size()]; 
          int i = 0; 
          for (ParseObject message : mMessages) { 
           usernames[i] = message.getString(ParseConstants.KEY_SENDER_NAME); 
           i++; 
          } 
          if (getListView().getAdapter() == null) { 
           MessageAdapter adapter = new MessageAdapter(getListView().getContext() 
             , mMessages); 
           setListAdapter(adapter); 
          } else { 
           ((MessageAdapter) getListView().getAdapter()).refill(mMessages); 
           ((MessageAdapter) getListView().getAdapter()).notifyDataSetChanged(); 
          } 
         } 
        } 
       }); 
      } 
      else{ 
       Log.e(TAG,e.getMessage()); 
      } 
     } 
    }); 

} 

中出現的錯誤這條線：

if (getListView().getAdapter() == null) { 

Answer 1

View rootView = inflater.inflate(R.layout.fragment_inbox, container, false); 

更換容器爲空。並將所有代碼onActivityCreated移動到onCreateView