Ошибка при добавлении фрагмента

Question

У меня есть основной класс, к которому я хочу добавить два фрагмента. На данный момент я закодировал только один фрагмент, поэтому решил проверить его. Тем не менее, я получаю исключение в журнале кошке, как показано ниже:

08-02 13:07:24.541: E/Trace(952): error opening trace file: No such file or directory (2) 
08-02 13:07:27.641: E/AndroidRuntime(952): FATAL EXCEPTION: main 
08-02 13:07:27.641: E/AndroidRuntime(952): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tqafragments/com.example.tqafragments.MainActivity}: android.view.InflateException: Binary XML file line #11: Error inflating class fragment 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.os.Handler.dispatchMessage(Handler.java:99) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.os.Looper.loop(Looper.java:137) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.ActivityThread.main(ActivityThread.java:5041) 
08-02 13:07:27.641: E/AndroidRuntime(952): at java.lang.reflect.Method.invokeNative(Native Method) 
08-02 13:07:27.641: E/AndroidRuntime(952): at java.lang.reflect.Method.invoke(Method.java:511) 
08-02 13:07:27.641: E/AndroidRuntime(952): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
08-02 13:07:27.641: E/AndroidRuntime(952): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
08-02 13:07:27.641: E/AndroidRuntime(952): at dalvik.system.NativeStart.main(Native Method) 
08-02 13:07:27.641: E/AndroidRuntime(952): Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class fragment 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
08-02 13:07:27.641: E/AndroidRuntime(952): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.Activity.setContentView(Activity.java:1881) 
08-02 13:07:27.641: E/AndroidRuntime(952): at com.example.tqafragments.MainActivity.onCreate(MainActivity.java:13) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.Activity.performCreate(Activity.java:5104) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
08-02 13:07:27.641: E/AndroidRuntime(952): ... 11 more 
08-02 13:07:27.641: E/AndroidRuntime(952): Caused by: android.app.SuperNotCalledException: Fragment FeedFragment{40d076d0 #0 id=0x7f080003} did not call through to super.onCreate() 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.Fragment.performCreate(Fragment.java:1675) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:854) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1137) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.app.Activity.onCreateView(Activity.java:4717) 
08-02 13:07:27.641: E/AndroidRuntime(952): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680) 
08-02 13:07:27.641: E/AndroidRuntime(952): ... 21 more 

---

Существует не так много в моей основной деятельности, кроме setContentView.
main.xml имеет fragment тег, который указывает на FeedFragment
Вот это FeedFragment класс:

package com.example.tqafragments; 

import java.util.Vector; 

import android.app.Fragment; 
import android.app.ProgressDialog; 
import android.content.Context; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.ExpandableListView; 

/** 
* FeedFragment 
* @author 
* 
*/ 
public class FeedFragment extends Fragment{ 
    Vector<Feed> feeds = null; 

    @Override 
    public void onCreate(Bundle savedInstanceState){ 
     // nothing to initialize. 
    } 
//------------------------------------------------------------------------------ 
    @Override 
    public View onCreateView(LayoutInflater inflater, 
      ViewGroup container, 
      Bundle savedInstanceState){ 
     return inflater.inflate(R.layout.feed_fragment, container, false); // inflate the fragment layout 
    } 
//------------------------------------------------------------------------------ 
    @Override 
    public void onStart(){ 
     new AsyncFeedRetriever().execute(new FeedProcessor()); // get the RSS feeds 
     // Add itemClickListener for ExpandableListView 
     // in other fragment as the other fragment 
     // is not yet inflated. Will result in a NPE here. 
    } 
//------------------------------------------------------------------------------ 
    /** 
    * AsyncRetriever 
    * @author 
    * 
    */ 
    class AsyncFeedRetriever extends AsyncTask<FeedProcessor,Void,FeedProcessor>{ 
     ProgressDialog pDialog = null; 
//------------------------------------------------------------------------------  
     @Override 
     protected void onPreExecute(){ 
      pDialog = new ProgressDialog(getActivity()); // display dialog box 
      pDialog.setMessage(getActivity().getResources().getText(R.string.loading)); 
      pDialog.show(); 
     } 
//------------------------------------------------------------------------------ 
     @Override 
     protected FeedProcessor doInBackground(FeedProcessor... arg0) { 
      FeedProcessor p = arg0[0]; 
      p.processFeed(); // get the feeds, actually, from the URL. 
      return p; 
     } 
//------------------------------------------------------------------------------ 
     @Override 
     protected void onPostExecute(FeedProcessor p){ 
      pDialog.dismiss(); 
      ExpandableListView list = (ExpandableListView) getActivity().findViewById(R.id.expandingList); 

      if(p.errorOccured == false){ 
       feeds = p.getFeeds(); // populate the list 
       ArrayAdapter<Feed> adapter = new ArrayAdapter<Feed>(
         getActivity(), 
         R.layout.list_row, 
         R.id.row, 
         feeds); 
       list.setAdapter(adapter); 
      }else{ 
       // nothing 
      } 
     } 
//------------------------------------------------------------------------------ 
    } 
} 

---

feed_fragment.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 
    <ExpandableListView android:id="@+id/expandingList" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_weight="1"> 

    </ExpandableListView> 
    <LinearLayout android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_weight="0" 
     android:gravity="center" 
     android:background="#FF808080"> 
     <Button android:id="@+id/refresh" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/refresh_str"/>" 
    </LinearLayout> 

</LinearLayout> 

Может кто-то пожалуйста, помогите мне решить эту проблему?

Answer 1

Ошибка: Caused by: android.app.SuperNotCalledException: Fragment FeedFragment{40d076d0 #0 id=0x7f080003} did not call through to super.onCreate() говорит, что вы пропускаете super.onCreate в методе onCreate:

public class FeedFragment extends Fragment{ 
Vector<Feed> feeds = null; 

@Override 
public void onCreate(Bundle savedInstanceState){ 
    // you need this line here! 
    super.onCreate(savedInstanceState); 

}