Toolbar shadow in coordinatorlayout pre lollipop

gistfile1.txt

elevation_compat.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient
        android:angle="270"
        android:endColor="@android:color/transparent"
        android:startColor="#50000000" />
</shape>

styles.xml
<style name="ElevationCompatTheme">
    <item name="android:visibility">visible</item>
</style>

styles.xml for api 21+
<style name="ElevationCompatTheme">
    <item name="android:visibility">gone</item>
</style>


put this at the bottom of your coordinatorlayout to make ot appear on top of other views
<View
    android:layout_width="match_parent"
    android:layout_height="4dp"
    android:background="@drawable/elevation_compat"
    android:theme="@style/ElevationCompatTheme"
    app:layout_behavior="your scrolling behaviour"/>

Thanks

Not working. Needs to be added some addon xml to AppBarLayout that is a Toolbar wrapper:
android:background="@android:drawable/screen_background_light_transparent"
In another case View will contain primaryColor