android - Can't synchronize call to notify() -


forgive me, not able call on notificationbuilder's notify() method. have code:

timer.scheduleatfixedrate(               new timertask() {                 @override                 public void run() {                     synchronized (this) {             builder notif = new notificationcompat.builder(c);         notif.setcontentintent(contintent)                 .setwhen(system.currenttimemillis())                 .setticker("notification ticker")                 .setsmallicon(r.drawable.ic_launcher)                 .setcontenttitle("vinceri")                 .setcontenttext("ha recibido una oferta de trabajo")                 .setautocancel(true);          notif.notify();         } } }

and no matter put synchronized block, same exception:

04-05 10:42:55.116: e/androidruntime(18244): fatal exception: timer-0 04-05 10:42:55.116: e/androidruntime(18244): java.lang.illegalmonitorstateexception: object not locked thread before notifyall() 04-05 10:42:55.116: e/androidruntime(18244):    @ java.lang.object.notifyall(native method) 04-05 10:42:55.116: e/androidruntime(18244):    @ com.publidirecta.vinceriazafata.notificationservice$1.run(notificationservice.java:126) 04-05 10:42:55.116: e/androidruntime(18244):    @ java.util.timer$timerimpl.run(timer.java:284)

it maybe noob question but... must not receive exception? thank you.

assuming trying add notification android notification drawer.. need following:

builder notif = new notificationcompat.builder(c);         notif.setcontentintent(contintent)                 .setwhen(system.currenttimemillis())                 .setticker("notification ticker")                 .setsmallicon(r.drawable.ic_launcher)                 .setcontenttitle("vinceri")                 .setcontenttext("ha recibido una oferta de trabajo")                 .setautocancel(true);       //create notification builder       notification notification = notif.build();       //get instance of notificationmanager       notificationmanager notificationmanager = (notificationmanager) getsystemservice(notification_service);       //call notify method of notificationmanager add notification android notification drawer..       notificationmanager.notify(0, notification);

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