android - what is the use of enterAlwaysCollapsed -


i studing support design liabrary.i cannot understand use of enteralwayscollapsed.it seems influece on pull down,but tried , find nothing changed. so,what use of enteralwayscollapsed,could show me demo?

let me answer myself. first activity theme apptheme.

    <style name="apptheme" parent="theme.appcompat.light.noactionbar">     <!-- customize theme here. -->     <item name="colorprimary">@color/colorprimary</item>     <item name="colorprimarydark">@color/colorprimarydark</item>     <item name="coloraccent">@color/coloraccent</item> </style>

and don't set fitssystemwindows in xml.
last use scroll flag scroll|enteralways|enteralwayscollapsed.
final effect below

enter image description here


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