java - onAccessibilityEvent not called in Kitkat -

i building app listens notifications , display onto calendar using accessibilityservice , whenever receive notification (i'm using emails test continually send mail myself) onaccessibilityservice never called , referred answers around here point jellybean think not case i'm looking

in accessibilitylistener.class

    @override         public void onaccessibilityevent(accessibilityevent event) {             final int eventtype = event.geteventtype();             notificationinfo info = new notificationinfo();              toast.maketext(getapplicationcontext(), "received event", 1000);              log.d("tag","onaccessibility event running");              if (event.geteventtype() == accessibilityevent.type_notification_state_changed)             {                        info.packagename = (string) event.getpackagename();                     info.eventtime = event.geteventtime();                     info.eventtext = event.gettext().tostring();                     sendevent(info);                         }         } 

in android.manifest

<service              android:enabled="true"              android:name=".accessibilitylistener"             android:permission="android.permission.bind_accessibility_service">             <intent-filter>                 <action android:name="android.accessibilityservice.accessibilityservice" />             </intent-filter>              <meta-data                 android:name="android.accessibilityservice"                 android:resource="@xml/accessibilityservice" />         </service> 

in accessibilityservice.xml in res/xml

<?xml version="1.0" encoding="utf-8"?> <accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"     android:accessibilityeventtypes="typenotificationstatechanged"     android:accessibilityfeedbacktype="feedbackallmask"     android:notificationtimeout="100" />