Snap: Using this option will determine what to do when a view only has been partially reduced. Only when scrolling reaches to the top will the view expand to its full height:ĮxitUntilCollapsed: When the scroll flag is set, scrolling down will normally cause the entire content to move:īy specifying a minHeight and exitUntilCollapsed, the minimum height of the Toolbar will be reached before the rest of the content begins to scroll and exit from the screen: When this setting is used, your view will only appear at this minimum height. Normally, the Toolbar only appears when the list is scrolled to the top as shown below:ĮnterAlwaysCollapsed: Normally, when only enterAlways is used, the Toolbar will continue to expand as you scroll down:Īssuming enterAlways is declared and you have specified a minHeight, you can also specify enterAlwaysCollapsed. This flag is useful in cases when scrolling from the bottom of a list and wanting to expose the Toolbar as soon as scrolling up takes place. This flag must be enabled along with enterAlways, enterAlwaysCollapsed, exitUntilCollapsed, or snap:ĮnterAlways: The view will become visible when scrolling up. The scroll flag used within the attribute app:layout_scrollFlags must be enabled for any scroll effects to take into effect. The behavior must be established on the view that triggers the event.
The support library contains a special string resource that maps to AppBarLayout.ScrollingViewBehavior, which is used to notify the AppBarLayout when scroll events occur on this particular view. Add an app:layout_behavior to a RecyclerView or any other View capable of nested scrolling such as NestedScrollView. Next, we need to define an association between the AppBarLayout and the View that will be scrolled. Note: AppBarLayout currently expects to be the direct child nested within a CoordinatorLayout according to the official ( ). Also make sure that the CoordinatorLayout is the main layout container. Make sure to follow the Using the ToolBar as ActionBar guide.
The first step is to make sure you are not using the deprecated ActionBar.
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