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NestedScrollCoordinatorLayout

compile 'com.otaliastudios:nestedscrollcoordinatorlayout:1.0.3'

A CoordinatorLayout that implements nested scrolling and propagates scroll events to parent views. This is useful for nested Coordinators, e.g. for inner fragments in a parent activity. By default, scroll events that take place inside the inner CoordinatorLayout won't reach the outer coordinator, and thus they won't trigger scroll animations and so on.

If NestedScrollCoordinatorLayout is used, events are correctly propagated.

Usage

Just use NestedScrollCoordinatorLayout as the inner CoordinatorLayout.

<!-- parent coordinator -->
<android.support.design.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <!-- stuff... -->
    
    <!-- inner coordinator with stuff inside -->
    <com.otaliastudios.nestedscrollcoordinatorlayout.NestedScrollCoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>   
    
</android.support.design.widget.CoordinatorLayout>

You can have slight control over the scroll propagation behavior using NestedScrollCoordinatorLayout.setPassMode(). Specifically:

  • PASS_MODE_BOTH (default): scroll events are passed to the parent stream and, at the same time, to this Coordinator childs
  • PASS_MODE_PARENT_FIRST: scroll events are passed to the parent stream and, if not consumed, they go on to this Coordinator childs

Contributing

You are welcome to contribute with issues, PRs or suggestions.