سلام
من میخواهم دوباره مقدار و آیکن اکشن دوم را تغییر دهم. اما جواب نمی‌دهد. چرا؟

Notification.Builder  notification = new Notification.Builder ( this )                        .setSmallIcon ( R.drawable.ic_play )
.setContentTitle ( "madaraneh.mp3" )
.setContentText ( "madaraneh" )
.setContentIntent ( PendingIntent.getActivity ( this, 0, new Intent ( this, MusicPlayerActivity.class ), 0 ) )
.setOngoing ( true )
.addAction ( R.drawable.ic_rewind, "Rewind", rewindPending )
.addAction ( iconAction, "Play", playPending )
.addAction ( R.drawable.ic_forward, "Forward", forwardPending )
;
NotificationManager notificationManager=(NotificationManager)getSystem Service ( NOTIFICATION_SERVICE );
notification.build ().actions[1]=new Notification.Action (R.drawable.a1,"hhhhhhhh",playPending);

notificationManager.notify ( 12,notification.build () );


کدی که برای ویرایش آیکن اکشن دوم نوشتم این است:
notification.build ().actions[1]=new Notification.Action (R.drawable.a1,"hhhhhhhh",playPending);