onEvent（）没有被调用？

Question

I am passing data from AsyncTask to a fragment of tabbed activity. Why onEvent() of EventBus is not being called?

BackgroundWorker.java doInBackground() is called by MainActivity

public class BackgroundWorker extends AsyncTask<String,Void,String> {

   @Override
   protected void onPostExecute(String line) {
     userResult =  line.split(" ");
     String result = userResult[0];

     if(result.equals("Success")){
       CustomMessageEvent event = new CustomMessageEvent();
       event.setCustomMessage(line);
       Intent intent = new Intent(context,TabActivity.class);
       intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
       context.startActivity(intent);
       EventBus.getDefault().post(event);
     }
   }
}

ProfileTab.java This file is a fragment of tabbed activity. Is there anything that should be done in tabbed activity or should doInBackground must be called again.

public class ProfileTab extends Fragment {

  public TextView t1;
  private View rootView;

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

    t1 = (TextView) rootView.findViewById(R.id.textView4);

    EventBus.getDefault().register(this);
    Log.d(TAG, "onCreateView: ");

    return rootView;
  }

  @Subscribe(threadMode = ThreadMode.ASYNC)
  public void onEventAsync(CustomMessageEvent event) {
    Log.d(TAG, "onEvent: ");
    t1.setText(event.getCustomMessage());
  }

}

Tried LocalBroadcastManager and the result was same, onReceive() was not called. Where am I going wrong?

Answer 1

If you start Activity in your onPostExecute , I suggest pass data by intent, not events - it is simpler. Your subscribed method isn't called, because event is posted before you register - use postSticky instead of post , and you will get an event.

I assume, you want to pass line ( String ). So construct intent:

Intent intent = new Intent(context,TabActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra("LINE", line);
context.startActivity(intent);

Than, in your TabActivity in onCreate read passed value:

String line = getIntent().getStringExtra("LINE", "");