android - LinearLayout inside DrawerLayout not showing shadow -

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i using linearlayout custom bottom bar should show shadow toolbar doing not being able make work, here layout:

<?xml version="1.0" encoding="utf-8"?> 

<linearlayout     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical">      <include layout="@layout/nav_toolbar"/>      ...      <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:background="@color/green"         android:elevation="2dp"         android:orientation="vertical">      </linearlayout> </linearlayout>  <include layout="@layout/nav_view"/>

as understood setting elevation should show shadow, layout absolutely flat, doing wrong?





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