Try to change your RecyclerView
height to "wrap_content"
and add the AppBarLayout
height as margin bottom.
<android.support.v7.widget.RecyclerView
android:id="@+id/simpleList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/height_of_app_bar"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
The cut-off part of the list item, is the height of the AppBarLayout
.