title: i can not push the notification ? with this code?
body: <p>i build a dialog to show and push a notification  but it can not appears </p>
  
  <pre><code>builder.setPositiveButton("Later", new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
  //----------------------------//
  
          NotificationCompat.Builder   mNotification = new NotificationCompat.Builder(ProfileNavigationDrawer.this);
          mNotification.setSmallIcon(R.drawable.start);
          mNotification.setTicker("Trip Name");
          mNotification.setContentTitle("Click to Start your Trip");
          mNotification.setContentText("Click to Appear");
  
  
          mNotification.setDefaults(Notification.DEFAULT_VIBRATE);
          Toast.makeText(ProfileNavigationDrawer.this, "Later Clicked ", Toast.LENGTH_SHORT).show();
  
  
      }
  });
  </code></pre>