Problem of overlapping CoordinatorLayout and FrameLayout as frame_container in Android

When using FrameLayout as frame_container in CoordinatorLayout, it overlaps CoordinateLayout. The solution is set app:layout_behavior="@string/appbar_scrolling_view_behavior" to FrameLayout.

http://stackoverflow.com/questions/32427084/android-supportlib-framelayout-in-coordinatorlayout-with-appbarlayout-consumin