android - Updating a cursor object in a thread when onChange is called in the ContentObserver -


i have intentservice tracks changes of database table of outgoing messages using contentobserver.

i watching when of rows hit specific state. when happens want finish intent service, or let service retry operations on row did not complete properly.

i can build contentobserver , know when data changes , onchange(boolean selfchange) called.

but how update ongoing loop in calling intentservice watching cursor? how use onchange call update/requerry cursor using in intentservice?

my contentobserver anonymous class , cannot assign new value cursor outgoingmessagecursor

eg: 

    cursor outgoingmessagecursor = getundeliveredmessagescursor();     contentobserver messageobserver = new contentobserver(null){          @override         public void onchange(boolean selfchange) {             super.onchange(selfchange,null);         }          @override         public void onchange(boolean selfchange, uri uri) {             super.onchange(selfchange, uri);         }     };      outgoingmessagecursor.registercontentobserver(messageobserver);     while(outgoingmessagecursor.getcount() > 0){         //there still messages handle         try {             thread.sleep(2000);             log.d(log_tag,"undelivered messages: " + outgoingmessagecursor.getcount());         } catch (interruptedexception e) {             e.printstacktrace();         }     }     outgoingmessagecursor.unregistercontentobserver(messageobserver);     outgoingmessagecursor.close();

how can escape while loop when messages have been handled?


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