java - Having trouble making a Android.os.Handler continue running -

so, have service need keep running in order send ayt device , report on connection (basically whether it's or down) @ regular intervals. have setup right now, works, after 10 or 15 minutes, ceases run. it's using handlerthread, handler , runnable start service, work, stops itself.

mainactivity.java snippets:

private handlerthread hthread = new handlerthread("maintainconnection"); private handler h; private runnable htask = new runnable() {     @override     public void run() {         startservice(new intent(getapplicationcontext(), maintainconnectionservice.class));         h.postdelayed(this, 2000);     } };  protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     hthread.start();     h = new handler(hthread.getlooper());     /* other code goes here */ }  @override protected void onpause() {     super.onpause();     log.v(tag, "i in onpause");     h.removecallbacks(htask); }  @override protected void onresume() {     super.onresume();     log.v(tag, "i in onresume");     h.post(htask); }  @override protected void onstop() {     super.onstop();     log.v(tag, "i in onstop");     h.removecallbacks(htask); } 

maintainconnectionservice.java

public class maintainconnectionservice extends intentservice {      public maintainconnectionservice() {         super(maintainconnectionservice.class.getname());     }      private static final string tag = "maintainconnectionsvc";      public static handler uihandler;     static {         uihandler = new handler(looper.getmainlooper());     }      public static void runonui(runnable runnable) {         uihandler.post(runnable);     }      @override     protected void onhandleintent(intent intent) {         try {             if (comms.telnet.sendayt(comms.ayt_timeout)) {                 log.d(tag, "sent ayt => " + comms.telnet.getremoteaddress() + ":" + comms.telnet.getremoteport());                 runonui(new runnable() {                     public void run() {                         colourcontrolfragment.connstat.setbackgroundcolor(color.green);                         colourcontrolfragment.connstattxt.settext("connection established");                     }                 });             } else {                 runonui(new runnable() {                     public void run() {                         colourcontrolfragment.connstat.setbackgroundcolor(color.yellow);                         colourcontrolfragment.connstattxt.settext("attempting reconnect");                     }                 });             }         } catch (exception e) {             log.e(tag, "failed send ayt to: " + comms.telnet_address);             runonui(new runnable() {                 public void run() {                     colourcontrolfragment.connstat.setbackgroundcolor(color.red);                     colourcontrolfragment.connstattxt.settext("not connected");                 }             });             startservice(new intent(getapplicationcontext(), establishconnectionservice.class));         }         stopself();     } } 

it appears work expected, said, after around 10 or 15 minutes, no warning, goes "yellow" state (attempting reconnect) , stays there. if close app , restart it, resumes working.

any way prevent threads being killed? suggestions on better way monitor connection?

i've tried plain threads , timers, no avail.

the handler in activity should static, otherwise have risk of leaking activity.

also, if remove callbacks in onresume , onpause (doing in both not make sense btw), make sense no longer receiving messages.