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Strange messages "Failed to send event" and "No subscribers registered for the event"

I tried to debug this thing for hours, and I really don't see a problem here.

This is my MainActivity. The main thing is to search here ArrayList<Servico>, being a Servicocustom object. I created a simple class "event" - ServicoActual- which only has a reference to the object Servico(and the / getter constructor):

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.SearchManager;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import net.pedromoreira.billper.events.ServicoActual;

import java.util.ArrayList;
import java.util.Locale;

import de.greenrobot.event.EventBus;


public class MainActivity extends Activity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;

    private CharSequence mDrawerTitle;
    private CharSequence mTitle;
    private ArrayList<Servico> servicos;
    //private String[] mPlanetTitles;

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

        servicos = new ArrayList<Servico>();
        servicos.add(new Servico("Luz"));
        servicos.add(new Servico("Água"));
        servicos.add(new Servico("Gás"));

        //Log.i("onCreate", "Servicos: " + servicos.size());

        setContentView(R.layout.activity_main);

        mTitle = mDrawerTitle = getTitle();
        //mPlanetTitles = getResources().getStringArray(R.array.planets_array);

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.left_drawer);

        // set a custom shadow that overlays the main content when the drawer opens
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
        // set up the drawer list view with items and click listener
        mDrawerList.setAdapter(new ArrayAdapter<Servico>(this,
                R.layout.drawer_list_item, servicos));
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

        // enable ActionBar app icon to behave as action to toggle nav drawer
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);

        // ActionBarDrawerToggle ties together the the proper interactions
        // between the sliding drawer and the action bar app icon
        mDrawerToggle = new ActionBarDrawerToggle(
                this,                  /* host Activity */
                mDrawerLayout,         /* DrawerLayout object */
                R.drawable.ic_drawer,  /* nav drawer image to replace 'Up' caret */
                R.string.drawer_open,  /* "open drawer" description for accessibility */
                R.string.drawer_close  /* "close drawer" description for accessibility */
        ) {
            public void onDrawerClosed(View view) {
                getActionBar().setTitle(mTitle);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }

            public void onDrawerOpened(View drawerView) {
                getActionBar().setTitle(mDrawerTitle);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);

        if (savedInstanceState == null) {
            selectItem(0);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    /* Called whenever we call invalidateOptionsMenu() */
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        // If the nav drawer is open, hide action items related to the content view
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
        menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // The action bar home/up action should open or close the drawer.
        // ActionBarDrawerToggle will take care of this.
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action buttons
        switch(item.getItemId()) {
            case R.id.action_websearch:
                // create intent to perform web search for this planet
                Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
                intent.putExtra(SearchManager.QUERY, getActionBar().getTitle());
                // catch event that there no activity to handle intent
                if (intent.resolveActivity(getPackageManager()) != null) {
                    startActivity(intent);
                } else {
                    Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show();
                }
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    /* The click listener for ListView in the navigation drawer */
    private class DrawerItemClickListener implements ListView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            selectItem(position);
            Log.i("DrawerItemClickListener", "Position: " + position);
        }
    }

    private void selectItem(int position) {
        // update the main content by replacing fragments
        Fragment fragment = new ServicoFragment();
        //Bundle args = new Bundle();
        //args.putInt(ServicoFragment.ARG_PLANET_NUMBER, position);
        //fragment.setArguments(args);

        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
        Log.i("selectItem", "Servico: " + servicos.get(position).getNome());
        EventBus.getDefault().postSticky(new ServicoActual(servicos.get(position)));

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        setTitle(servicos.get(position).getNome());
        mDrawerLayout.closeDrawer(mDrawerList);
    }

    @Override
    public void setTitle(CharSequence title) {
        mTitle = title;
        getActionBar().setTitle(mTitle);
    }

    /**
     * When using the ActionBarDrawerToggle, you must call it during
     * onPostCreate() and onConfigurationChanged()...
     */

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

    /**
     * Fragment that appears in the "content_frame"
     */
    public static class ServicoFragment extends Fragment {
        //public static final String ARG_PLANET_NUMBER = "planet_number";

        private TextView mTestText;

        public ServicoFragment() {
            // Empty constructor required for fragment subclasses
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            EventBus.getDefault().registerSticky(this);
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_servico, container, false);
            //int i = getArguments().getInt(ARG_PLANET_NUMBER);
            //String planet = getResources().getStringArray(R.array.planets_array)[i];

            //int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()),
            //        "drawable", getActivity().getPackageName());
            //((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);

            //getActivity().setTitle(planet);

            mTestText = ((TextView) rootView.findViewById(R.id.test_text));
            Log.i("onCreateView", "mTestText: " + mTestText.toString());
            mTestText.setText("xpto");

            return rootView;
        }

        public void onEvent(ServicoActual e){
            Servico servico = e.getServico();
            Log.i("onEvent", "Servico: " + servico.getNome());
            getActivity().setTitle(servico.getNome());
            mTestText.setText(servico.getNome());
        }
    }
}

So, when I clicked on the box list item, I try to pass the corresponding Servico(inside the event ServicoActual") to ServicoFragment, which should write the name Servicoin it TextView.

This is what happens with one click on the first element (0):

07-13 00:50:35.388  26244-26244/net.pedromoreira.billper I/ViewRootImpl﹕ ViewRoot Touch Event : Touch Down
07-13 00:50:35.628  26244-26244/net.pedromoreira.billper I/ViewRootImpl﹕ ViewRoot Touch Event : Touch UP
07-13 00:50:36.308  26244-26244/net.pedromoreira.billper I/ViewRootImpl﹕ ViewRoot Touch Event : Touch Down
07-13 00:50:36.358  26244-26244/net.pedromoreira.billper I/ViewRootImpl﹕ ViewRoot Touch Event : Touch UP
07-13 00:50:36.428  26244-26244/net.pedromoreira.billper I/selectItem﹕ Servico: Luz
07-13 00:50:36.428  26244-26244/net.pedromoreira.billper I/onEvent﹕ Servico: Luz
07-13 00:50:36.458  26244-26244/net.pedromoreira.billper E/Event﹕ Could not dispatch event: class net.pedromoreira.billper.events.ServicoActual to subscribing class class net.pedromoreira.billper.MainActivity$ServicoFragment
    java.lang.NullPointerException
            at net.pedromoreira.billper.MainActivity$ServicoFragment.onEvent(MainActivity.java:235)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at de.greenrobot.event.EventBus.invokeSubscriber(EventBus.java:569)
            at de.greenrobot.event.EventBus.postToSubscription(EventBus.java:500)
            at de.greenrobot.event.EventBus.postSingleEvent(EventBus.java:475)
            at de.greenrobot.event.EventBus.post(EventBus.java:365)
            at de.greenrobot.event.EventBus.postSticky(EventBus.java:406)
            at net.pedromoreira.billper.MainActivity.selectItem(MainActivity.java:161)
            at net.pedromoreira.billper.MainActivity.access$300(MainActivity.java:35)
            at net.pedromoreira.billper.MainActivity$DrawerItemClickListener.onItemClick(MainActivity.java:146)
            at android.widget.AdapterView.performItemClick(AdapterView.java:299)
            at android.widget.AbsListView.performItemClick(AbsListView.java:1158)
            at android.widget.AbsListView$PerformClick.run(AbsListView.java:2957)
            at android.widget.AbsListView$3.run(AbsListView.java:3849)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5105)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
            at dalvik.system.NativeStart.main(Native Method)
07-13 00:50:36.458  26244-26244/net.pedromoreira.billper I/onEvent﹕ Servico: Luz
07-13 00:50:36.468  26244-26244/net.pedromoreira.billper D/Event﹕ No subscribers registered for event class de.greenrobot.event.SubscriberExceptionEvent
07-13 00:50:36.468  26244-26244/net.pedromoreira.billper I/DrawerItemClickListener﹕ Position: 0
07-13 00:50:36.498  26244-26244/net.pedromoreira.billper I/onEvent﹕ Servico: Luz
07-13 00:50:36.508  26244-26244/net.pedromoreira.billper E/Event﹕ Could not dispatch event: class net.pedromoreira.billper.events.ServicoActual to subscribing class class net.pedromoreira.billper.MainActivity$ServicoFragment
    java.lang.NullPointerException
            at net.pedromoreira.billper.MainActivity$ServicoFragment.onEvent(MainActivity.java:236)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at de.greenrobot.event.EventBus.invokeSubscriber(EventBus.java:569)
            at de.greenrobot.event.EventBus.postToSubscription(EventBus.java:500)
            at de.greenrobot.event.EventBus.subscribe(EventBus.java:288)
            at de.greenrobot.event.EventBus.register(EventBus.java:189)
            at de.greenrobot.event.EventBus.registerSticky(EventBus.java:166)
            at net.pedromoreira.billper.MainActivity$ServicoFragment.onCreate(MainActivity.java:209)
            at android.app.Fragment.performCreate(Fragment.java:1688)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:860)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1063)
            at android.app.BackStackRecord.run(BackStackRecord.java:684)
            at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1450)
            at android.app.FragmentManagerImpl$1.run(FragmentManager.java:444)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5105)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
            at dalvik.system.NativeStart.main(Native Method)
07-13 00:50:36.508  26244-26244/net.pedromoreira.billper D/Event﹕ No subscribers registered for event class de.greenrobot.event.SubscriberExceptionEvent
07-13 00:50:36.508  26244-26244/net.pedromoreira.billper I/onCreateView﹕ mTestText: android.widget.TextView{429216d0 V.ED.... ......ID 0,0-0,0 #7f090003 app:id/test_text}

What can i do wrong?

+4
1

. , . , , , . , onAttach().

http://developer.android.com/reference/android/app/Fragment.html#onAttach(android.app.Activity)

- , , .

Update:

. , EventBus , . . . , EventBus , , , .

NullPointerException . onCreate() , . . . , , , onCreateView() () , TextView . , . . :

, . , onCreateView()/onDestroyView(). / , .

, , , , , / , " " " .

Runnable, , , , .

, / Servico, ServicoActual, .

+5

Source: https://habr.com/ru/post/1548212/

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