android - Notification disappear after activity finish -

i have activity named a start broadcast receiver. activity a triggered notification disappear automatically when activity destroy(finish). want keep notification until user click or manually clear notification.

how activity start broadcast receiver

intent = new intent(context,a.class); i.addflags(intent.flag_activity_new_task | intent.flag_activity_brought_to_front); i.putextras(intent.getextras()); context.startactivity(i); 

notification

intent notificationintent = new intent(); notificationintent.setclass(context,b.class); notificationintent.setaction(intent.action_main); notificationintent.addcategory(intent.category_launcher); notificationintent.setflags( intent.flag_activity_brought_to_front); pendingintent pendingintent = pendingintent.getactivity(context, 0, notificationintent, 0); notification notification = new notificationcompat.builder(context)         .setsmallicon(r.drawable.notification_small)         .setcontenttitle(status)         .setticker(status)         .setautocancel(false)         .setcontenttext(message)         .setdefaults(notification.default_sound)         .setlargeicon(                 bitmap.createscaledbitmap(icon, 128, 128, false))         .setcontentintent(pendingintent)         .build(); 

manifest options

<activity android:name="com.example.activity.a" android:screenorientation="portrait" android:launchmode="singletask" android:taskaffinity="" android:excludefromrecents="true"/> 

note: tried singleinstance no luck.

edit(fixed)

i made silly mistake. called clearall() instead of cancel specific notification in ondestroy() function.

i think cancelling notification in app when activity destroyed.