Android TV SearchFragment сбой при попытке отправить запрос (NPE)

Question

Я пытаюсь осуществить поиск в моем ТВ приложение, но при нажатии кнопки отправки на поиск он падает со следующим сообщением:

java.lang.NullPointerException: Attempt to invoke virtual method 'int android.support.v17.leanback.widget.ObjectAdapter.size()' on a null object reference 
      at android.support.v17.leanback.app.SearchFragment.focusOnResults(SearchFragment.java:581) 
      at android.support.v17.leanback.app.SearchFragment.queryComplete(SearchFragment.java:567) 
      at android.support.v17.leanback.app.SearchFragment.access$1300(SearchFragment.java:63) 
      at android.support.v17.leanback.app.SearchFragment$4.onKeyboardDismiss(SearchFragment.java:257) 
      at android.support.v17.leanback.widget.SearchBar$6$2.run(SearchBar.java:257) 
      at android.os.Handler.handleCallback(Handler.java:739) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

Ниже является моя реализация SearchFragment:

public class SearchTVFragment extends SearchFragment implements SearchFragment.SearchResultProvider{ 

    private static final int SEARCH_DELAY_MS = 300; 
    private static final String TAG = SearchTVFragment.class.getSimpleName(); 

    final private ArrayObjectAdapter mRowsAdapter = new ArrayObjectAdapter(new ListRowPresenter()); 
    final ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(1); 
    ScheduledFuture<List<VideoEntryWrapper>> searchResult; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setSpeechRecognitionCallback(new SpeechRecognitionCallback() { 
      @Override 
      public void recognizeSpeech() { 

      } 
     }); 

     setSearchResultProvider(this); 
     Toast.makeText(getActivity(),"Search onCreate", Toast.LENGTH_SHORT).show(); 

    } 

    @Override 
    public ArrayObjectAdapter getResultsAdapter() { 
     return mRowsAdapter; 
    } 

    @Override 
    public boolean onQueryTextChange(String newQuery) { 
     return false; 
    } 

    @Override 
    public boolean onQueryTextSubmit(String query) { 
     return processQuery(query); 
    } 

    boolean processQuery(String query){ 
     Log.debug(TAG,"processQuery : "+query); 
     if(searchResult != null){ 
      searchResult.cancel(true); 
     } 
     searchResult = scheduledExecutorService.schedule(new SearchVideoTask(query, 0, 20) 
       , SEARCH_DELAY_MS, TimeUnit.MILLISECONDS); 
     processResponse(searchResult); 
     return true; 
    } 

    private void processResponse(final ScheduledFuture<List<VideoEntryWrapper>> searchRes){ 
     new AsyncTask<Void,Void,List<VideoEntryWrapper>>(){ 
      @Override 
      protected List<VideoEntryWrapper> doInBackground(Void... params) { 
       try { 
        Log.debug(TAG,">> processResponse"); 
        List<VideoEntryWrapper> videoEntryWrappers = searchRes.get(); 
        Log.debug(TAG,"<< processResponse"); 
        return videoEntryWrappers; 
       } catch (CancellationException|InterruptedException e) { 
        Log.debug(TAG,"<< processResponse cancelled"); 
       } catch (ExecutionException e) { 
        Log.error(TAG,"<< processResponse error : "+e.getMessage()); 
       } 
       return null; 
      } 

      @Override 
      protected void onPostExecute(List<VideoEntryWrapper> videoEntryWrappers) { 
       if(videoEntryWrappers != null){ 
        Log.debug(TAG,">> view response"); 

        ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(new SongEntryPresenter()); 

        for (VideoEntryWrapper videoEntryWrapper: videoEntryWrappers){ 
         listRowAdapter.add(videoEntryWrapper); 
        } 

        mRowsAdapter.add(new ListRow(listRowAdapter)); 

        Log.debug(TAG,"<< view response"); 

       } else { 
        Log.debug(TAG,">> no data to view response"); 
       } 
      } 
     }.execute(); 
    } 

} 

Что здесь не так? Почему адаптер null, если я предоставляю его в getResultsAdapter() методе?

свалка бревен:

3 1660-1671/com.mypackage.name I/art﹕ WaitForGcToComplete blocked for 3.066s for cause HeapTrim 
02-10 16:59:23.428 1660-1660/com.mypackage.name D/InputEventConsistencyVerifier﹕ TouchEvent: Source was not SOURCE_CLASS_POINTER. 
    in android.support.v17.leanback.widget.SearchEditText{3b6b36a3 VFED..CL .F.P.... 32,18-799,57 #7f0e0192 app:id/lb_search_text_editor} 
    0: sent at 952267000000, MotionEvent { action=ACTION_DOWN, id[0]=0, x[0]=767.0, y[0]=39.0, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=952267, downTime=952267, deviceId=0, source=0x0 } 
    -- recent events -- 
    1: sent at 952082381000, MotionEvent { action=ACTION_UP, id[0]=0, x[0]=125.0, y[0]=18.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=952082, downTime=951974, deviceId=0, source=0x1002 } 
    2: sent at 951974040000, MotionEvent { action=ACTION_DOWN, id[0]=0, x[0]=125.0, y[0]=18.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=951974, downTime=951974, deviceId=0, source=0x1002 } 
02-10 16:59:23.431 1660-1660/com.mypackage.name D/InputEventConsistencyVerifier﹕ TouchEvent: Source was not SOURCE_CLASS_POINTER. 
    in android.support.v17.leanback.widget.SearchEditText{3b6b36a3 VFED..CL .F.P.... 32,18-799,57 #7f0e0192 app:id/lb_search_text_editor} 
    0: sent at 952465000000, MotionEvent { action=ACTION_UP, id[0]=0, x[0]=767.0, y[0]=39.0, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=952465, downTime=952465, deviceId=0, source=0x0 } 
    -- recent events -- 
    1: sent at 952267000000, MotionEvent { action=ACTION_DOWN, id[0]=0, x[0]=767.0, y[0]=39.0, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x80000000, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=952267, downTime=952267, deviceId=0, source=0x0 } 
    2: sent at 952082381000, MotionEvent { action=ACTION_UP, id[0]=0, x[0]=125.0, y[0]=18.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=952082, downTime=951974, deviceId=0, source=0x1002 } 
    3: sent at 951974040000, MotionEvent { action=ACTION_DOWN, id[0]=0, x[0]=125.0, y[0]=18.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=951974, downTime=951974, deviceId=0, source=0x1002 } 
02-10 16:59:23.905 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 26600(1800KB) AllocSpace objects, 54(1086KB) LOS objects, 13% free, 12MB/14MB, paused 2.427ms total 1.699s 
02-10 16:59:24.101 1660-1660/com.mypackage.name E/RecyclerView﹕ No adapter attached; skipping layout 
02-10 16:59:25.639 1660-1672/com.mypackage.name I/art﹕ Background partial concurrent mark sweep GC freed 25993(1512KB) AllocSpace objects, 63(1464KB) LOS objects, 25% free, 11MB/15MB, paused 3.207ms total 340.306ms 
02-10 16:59:28.745 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 5324(417KB) AllocSpace objects, 13(240KB) LOS objects, 1% free, 15MB/15MB, paused 2.204ms total 229.996ms 
02-10 16:59:29.129 1660-1672/com.mypackage.name I/art﹕ Background partial concurrent mark sweep GC freed 11273(526KB) AllocSpace objects, 24(606KB) LOS objects, 21% free, 14MB/18MB, paused 9.062ms total 355.074ms 
02-10 16:59:29.132 1660-1671/com.mypackage.name I/art﹕ WaitForGcToComplete blocked for 226.367ms for cause HeapTrim 
02-10 16:59:31.354 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 15296(1193KB) AllocSpace objects, 48(1120KB) LOS objects, 10% free, 16MB/18MB, paused 3.980ms total 118.393ms 
02-10 16:59:32.953 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 2874(255KB) AllocSpace objects, 14(363KB) LOS objects, 3% free, 17MB/18MB, paused 12.077ms total 66.367ms 
02-10 16:59:34.865 1660-1672/com.mypackage.name I/art﹕ Background partial concurrent mark sweep GC freed 16826(947KB) AllocSpace objects, 44(1077KB) LOS objects, 18% free, 17MB/21MB, paused 1.929ms total 678.420ms 
02-10 16:59:36.906 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 12683(1028KB) AllocSpace objects, 45(1056KB) LOS objects, 9% free, 19MB/21MB, paused 2.011ms total 168.397ms 
02-10 16:59:38.322 1660-1660/com.mypackage.name E/RecyclerView﹕ No adapter attached; skipping layout 
02-10 16:59:38.539 1660-1660/com.mypackage.name D/AndroidRuntime﹕ Shutting down VM 
02-10 16:59:38.919 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 4319(368KB) AllocSpace objects, 8(144KB) LOS objects, 1% free, 20MB/21MB, paused 2.288ms total 249.723ms 
02-10 16:59:39.101 1660-1672/com.mypackage.name I/art﹕ Background partial concurrent mark sweep GC freed 12459(582KB) AllocSpace objects, 36(956KB) LOS objects, 17% free, 19MB/23MB, paused 2.706ms total 173.491ms 
02-10 16:59:40.871 1660-1672/com.mypackage.name I/art﹕ Background sticky concurrent mark sweep GC freed 26845(1677KB) AllocSpace objects, 36(837KB) LOS objects, 8% free, 20MB/22MB, paused 2.210ms total 128.916ms 
02-10 16:59:41.121 1660-1660/com.mypackage.name E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.mypackage.name, PID: 1660 
    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.support.v17.leanback.widget.ObjectAdapter.size()' on a null object reference 
      at android.support.v17.leanback.app.SearchFragment.focusOnResults(SearchFragment.java:581) 
      at android.support.v17.leanback.app.SearchFragment.queryComplete(SearchFragment.java:567) 
      at android.support.v17.leanback.app.SearchFragment.access$1300(SearchFragment.java:63) 
      at android.support.v17.leanback.app.SearchFragment$4.onKeyboardDismiss(SearchFragment.java:257) 
      at android.support.v17.leanback.widget.SearchBar$6$2.run(SearchBar.java:257) 
      at android.os.Handler.handleCallback(Handler.java:739) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
02-10 16:59:43.968 1660-1660/com.mypackage.name I/Process﹕ Sending signal. PID: 1660 SIG: 9 
02-10 16:59:45.723 1798-1798/com.mypackage.name I/MultiDex﹕ VM with version 2.1.0 has multidex support 
02-10 16:59:45.724 1798-1798/com.mypackage.name I/MultiDex﹕ install 
02-10 16:59:45.724 1798-1798/com.mypackage.name I/MultiDex﹕ VM has multidex support, MultiDex support library is disabled. 
02-10 16:59:46.337 1798-1798/com.mypackage.name I/MyAppApplication﹕ >> onCreate 
02-10 16:59:46.349 1798-1798/com.mypackage.name D/DeviceUtils﹕ >> getAdvertisingId 
02-10 16:59:46.354 1798-1798/com.mypackage.name D/DeviceUtils﹕ << getAdvertisingId 
02-10 16:59:46.377 1798-1814/com.mypackage.name D/DeviceUtils﹕ >> getAdvertisingId try fetching id 
02-10 16:59:46.381 1798-1814/com.mypackage.name D/DeviceUtils﹕ >> getAdvertisingId inSyncBlock id not exist 
02-10 16:59:46.396 1798-1814/com.mypackage.name D/DeviceUtils﹕ >> getAdId 
02-10 16:59:46.471 1798-1798/com.mypackage.name I/Crashlytics﹕ Initializing Crashlytics 1.1.13.29 
02-10 16:59:47.100 1798-1798/com.mypackage.name I/MyAppApplication﹕ << onCreate 
02-10 16:59:52.300 1798-1798/com.mypackage.name D/InstallationTableWrapper﹕ Save installation successful 

Answer 1

Я тоже искал ответ на него. Разрешение было простым. Вы и я забыл сообщить классу, что этот класс задан как ответ по умолчанию.

Добавить:

setSearchResultProvider(this); 

в OnCreate, чтобы получить это исправлено. Это все.