android - Visibility of image button not working for lollipop devices and above -

i have imagebutton default invisible :

  <imagebutton     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:id="@+id/anchor"     android:src="@drawable/anchor"     android:elevation="6dp"     android:layout_below="@+id/rl_row_progress_bar"     android:layout_centerhorizontal="true"     android:visibility="invisible"/> 

on activity change it's attribute code :

 if(lastpotition == 1){     mimagebutton.setvisibility(view.gone);  } else{     mimagebutton.setvisibility(view.visible);  } 

the problem in pre lollipop image button works fine in apis 21 , 22 doesn't work

this declaration of imagebutton:

private imagebutton mimagebutton; mimagebutton =(imagebutton)v.findviewbyid(r.id.anchor); //anchor 

thank help.

i had issue later have discovered related settings in lollipop device.

here 3 options described here: lollipop notification setvisibility() not work?

• show notification content makes notifications (regardless of visibility) public.

• hide sensitive notification content respects new visibility types.

• don't show notifications @ make notifications secret.