OnQueryTextListener에서 Nullpointer 예외가 발생했습니다.

ActionBar에서 SearchView를 사용하고 싶습니다. 그러나 OnQueryTextListener를 추가하면 NullPointerException이 나타납니다. 또한 bar에 searchView를 표시 할 수 없습니다.OnQueryTextListener에서 Nullpointer 예외가 발생했습니다.

MainActivity.java

public class MainActivity extends ActionBarActivity implements OnQueryTextListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     if (savedInstanceState == null) { 
      getSupportFragmentManager().beginTransaction() 
        .add(R.id.container, new PlaceholderFragment()).commit(); 
     } 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 

     // Inflate the menu; this adds items to the action bar if it is present. 

      MenuInflater inflater = getMenuInflater(); 
      inflater.inflate(R.menu.main, menu); 
      MenuItem searchItem = menu.findItem(R.id.action_search); 
      SearchView searchView = (SearchView)MenuItemCompat.getActionView(searchItem); 
      searchView.setOnQueryTextListener(this); 
      return super.onCreateOptionsMenu(menu); 

    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 

    /** 
    * A placeholder fragment containing a simple view. 
    */ 
    public static class PlaceholderFragment extends Fragment { 

     public PlaceholderFragment() { 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
       Bundle savedInstanceState) { 
      View rootView = inflater.inflate(R.layout.fragment_main, container, 
        false); 
      return rootView; 
     } 
    } 

    @Override 
    public boolean onQueryTextChange(String arg0) { 
     // TODO Auto-generated method stub 
     return false; 
    } 

    @Override 
    public boolean onQueryTextSubmit(String arg0) { 
     // TODO Auto-generated method stub 
     return false; 
    } 

}

menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    tools:context="de.group42.todo.MainActivity" > 
<item 
      android:id="@+id/action_search" 
      android:title="Search" 
      android:icon="@drawable/abc_ic_search" 
      android:showAsAction="always" 
      android:actionViewClass="android.support.v7.widget.SearchView" 
      /> 
    <item 
     android:id="@+id/action_settings" 
     android:orderInCategory="100" 
     android:title="@string/action_settings" 
     app:showAsAction="never"/> 

</menu>

나는 내가 뭘 잘못했는지 단서가 없다. 누군가 나를 도울 수 있습니까?

편집 : 로그 캣은

06-11 23:13:10.755: E/AndroidRuntime(17723): FATAL EXCEPTION: main 
06-11 23:13:10.755: E/AndroidRuntime(17723): java.lang.NullPointerException 
06-11 23:13:10.755: E/AndroidRuntime(17723): at de.group42.todo.MainActivity.onCreateOptionsMenu(MainActivity.java:42) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.app.Activity.onCreatePanelMenu(Activity.java:2578) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:224) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:232) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:146) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:199) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:293) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:507) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:934) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:292) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:791) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.view.Choreographer.doCallbacks(Choreographer.java:591) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.view.Choreographer.doFrame(Choreographer.java:560) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:777) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.os.Handler.handleCallback(Handler.java:730) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.os.Handler.dispatchMessage(Handler.java:92) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.os.Looper.loop(Looper.java:176) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at android.app.ActivityThread.main(ActivityThread.java:5419) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at java.lang.reflect.Method.invokeNative(Native Method) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at java.lang.reflect.Method.invoke(Method.java:525) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862) 
06-11 23:13:10.755: E/AndroidRuntime(17723): at dalvik.system.NativeStart.main(Native Method)

라인 (42)이 청취자를 추가했다. 당신이 나를 도울 수 있기를 바랍니다.

감사합니다 :)

출처

2014-06-11 user3731558

StackTrace/Log 항목이 있습니까? 게시 해주세요. – Dawnkeeper

안녕하세요. 나는 그들을 지금 편집했다. 이렇게 늦어서 미안해. – user3731558