Android and iot Hub Azure , create service mqtt client -

i read , follow in link : https://github.com/azure/azure-iot-sdk-java/tree/master/device/iot-device-samples/android-sample

now , because want app run in background , listen messages received iothub azure , create service. service have timer task send after n-time report server. service open connection azureiot sdk , wait message.

i know bad solution , , see don't catch message or catch annoying delay.

what right implementation of kind of client mqtt listener on service ( or not if wrong ) on android app run in background ?

this code :

public class homeservice extends service {     public static final long interval = 15 * 1000;     private handler mhandler = new handler();     private timer mtimer = null;     private requestqueue queue;     private commandsender commandsender;     deviceclient client = null;      private boolean statelight = false;      @nullable     @override     public ibinder onbind(intent intent) {         throw new unsupportedoperationexception("unsupported operation");     }      ///private final static string conn_string = "hostname=lifesensorhub.azure-devices.net;sharedaccesskeyname=device;sharedaccesskey=mhpmt3hl4jmebini/xpd+yo7afweguumxquzbnf/+pa=;deviceid=android-tv-dev";      private runnable runnable = new runnable() {         @override         public void run() {             while(true) {                 waitformessage();             }         }     };      @override     public void oncreate() {          new thread(runnable).start();          if (mtimer != null)             mtimer.cancel();         else             mtimer = new timer();         commandsender = new commandsender(this);         mtimer.scheduleatfixedrate(new timedisplaytimertask(), 0, interval);     }      public void waitformessage() {         iothubclientprotocol protocol = iothubclientprotocol.mqtt;         try {             if(client == null) {                 client = new deviceclient(azurehelper.conn_string, protocol);             }                 try {                     client.open();                 } catch (ioexception e1) {                     system.out.println("exception while opening iothub connection: " + e1.tostring());                 } catch (exception e2) {                     system.out.println("exception while opening iothub connection: " + e2.tostring());                 }              if (protocol == iothubclientprotocol.mqtt) {                 azurehelper.messagecallbackmqtt callback = new azurehelper.messagecallbackmqtt(commandsender);                 azurehelper.counter counter = new azurehelper.counter(0);                 client.setmessagecallback(callback, counter);             } else {                 azurehelper.messagecallback callback = new azurehelper.messagecallback();                 azurehelper.counter counter = new azurehelper.counter(0);                 client.setmessagecallback(callback, counter);             }              thread.sleep(2000);             client.close();         } catch (urisyntaxexception e) {             e.printstacktrace();         } catch (interruptedexception e) {             e.printstacktrace();         } catch (ioexception e) {             e.printstacktrace();         }     }      @override     public void ondestroy() {         mtimer.cancel();     }      private class timedisplaytimertask extends timertask {         @override         public void run() {             mhandler.post(new runnable() {                 @override                 public void run() {                     makerequest();                 }             });         }     }       private void makerequest() {         commandsender.getstatus();     } }