[FIXED] sending message to a handler on a dead thread

Issue

I am working on a background service that for a period of time poll to a server something. The point is that: I have an IntentService (called NotificationsService) which calls another service, but the response of this request does'nt get back. And in the logcat appears:

06-19 05:12:00.151: W/MessageQueue(6436): Handler (android.os.Handler) {416659f0} sending message to a Handler on a dead thread
06-19 05:12:00.151: W/MessageQueue(6436): java.lang.RuntimeException: Handler (android.os.Handler) {416659f0} sending message to a Handler on a dead thread
06-19 05:12:00.151: W/MessageQueue(6436):   at android.os.MessageQueue.enqueueMessage(MessageQueue.java:196)
06-19 05:12:00.151: W/MessageQueue(6436):   at android.os.Handler.sendMessageAtTime(Handler.java:473)
06-19 05:12:00.151: W/MessageQueue(6436):   at android.os.Handler.sendMessageDelayed(Handler.java:446)
06-19 05:12:00.151: W/MessageQueue(6436):   at android.os.Handler.post(Handler.java:263)
06-19 05:12:00.151: W/MessageQueue(6436):   at android.os.ResultReceiver$MyResultReceiver.send(ResultReceiver.java:50)

I looked here problems similar but I got confused (I'm not using any AsyncTask, and I've looked for CommonsWare code wakefullIntent but i didn't understand it).

Here it's the code for NotificationsService.java

public class NotificationsService extends IntentService {
private static  int TIME_INTERVAL_MILIS=90000;
private static final int REFRESH=10;
private  NotificationManager noteManager;
private static List<FlightStatusNote> flights= new ArrayList<FlightStatusNote>();



public NotificationsService(){
    super("NotificationsService");

}

@Override
public void onCreate(){
    Log.d("notificationsSservice","onCreate");
    super.onCreate();
    noteManager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
}



@Override
protected void onHandleIntent(Intent intent) {
    Log.d("NotificationsService","Me llamaron");

    Log.d("NotificationsService", "intervalo:"+NotificationsService.TIME_INTERVAL_MILIS);
        Log.d("NotificationsService","Itero por cada vuelo registrado para notificar");
        for(FlightStatusNote f: flights){
            FlightStatus fly=f.getFlight();
            Log.d("NotificationsService","Vuelo id:"+fly.getAirlineId()+fly.getNumberFlight());
            Intent intentaux=new Intent(Intent.ACTION_SYNC,null,getBaseContext(),FlightStatusService.class);
            intentaux.putExtra("airlineFlight", fly.getAirlineId());
            intentaux.putExtra("numberFlight",fly.getNumberFlight() );
            intentaux.putExtra("receiver", new ResultReceiver(new Handler()) {

                @Override
                protected void onReceiveResult(int resultCode, Bundle resultData) {
                    super.onReceiveResult(resultCode, resultData);
                    Log.d("notificationsService","response received");
                    if (resultCode == FlightStatusService.STATUS_OK) {
                        List<FlightStatus> fly =  (List<FlightStatus>)resultData.getSerializable("return");
                        for(FlightStatus f: fly){
                            int indexNote=flights.indexOf(new FlightStatusNote(f,null));
                            FlightStatusNote fsNote=flights.get(indexNote);
                            List<String> changes=fsNote.hasChanged(f);
                            if(changes==null){
                                Log.d("notificationsService","changes is null");
                            }
                            else{
                                Log.d("notficationsService", "comething changed");
                                createNotification(f, changes);
                            }

                        }


                    }

                }

            });
            startService(intentaux);
    }

        AlarmManager alarmMgr = (AlarmManager) getBaseContext().getSystemService(Context.ALARM_SERVICE);
          PendingIntent pendingIntent =  PendingIntent.getBroadcast(getBaseContext(), 0, new Intent(getBaseContext(), DealAlarmReceiver.class), 0);
          alarmMgr.set(AlarmManager.RTC, System.currentTimeMillis()+NotificationsService.TIME_INTERVAL_MILIS, pendingIntent);

}
}

If anyone can help me, I would appreciate it a lot! Cheers!

Edit: I think the problem is that the Log "response received" it doesn't appear.

Solution

IntentServices create a new thread when you call the onHandleIntent method, and then kills that thread as soon as that onHandleIntent method returns.

You need to create your listener somewhere else, IntentServices aren't safe for setting up listeners because they die. They're mainly used for executing a short task outside of the main thread. See a similar question here.

Edit: Also see documentation on IntentService.

Answered By - jpalm
Answer Checked By - Mary Flores (JavaFixing Volunteer)