Appcompat v21 Toolbar elevation pre-lollipop

Question

First off, I know that this question has been asked before, but it hasn't been answered before. I hope someone can give me an answer.

In my application, I use the Toolbar from Appcompat_v7 (API 21). This is my code:

<android.support.v7.widget.Toolbar
    style="@style/DarkActionbarStyle"
    android:id="@+id/toolBar"
    android:layout_width="match_parent"
    android:layout_height="@dimen/actionbar_height" />

And this is the ToolBar style I use:

<style name="DarkActionbarStyle" parent="@style/Widget.AppCompat.Toolbar">
    <item name="android:background">?attr/colorPrimary</item>
    <item name="titleTextAppearance">@style/ActionBarTitle</item>
    <item name="android:elevation">2dp</item>
    <item name="popupTheme">@style/ThemeOverlay.AppCompat.Light</item>
    <item name="theme">@style/ThemeActionBarDark</item>
</style>

<style name="ThemeActionBarDark" parent="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
    <item name="actionBarItemBackground">@drawable/btn_dark_orange</item>
    <item name="selectableItemBackground">@drawable/btn_dark_orange</item>
</style>

The problem is, that elevation doesn't work pre-lollipop. So my question is: Is it possible to have a shadow under the ToolBar on pre-lollipop devices?

Answer 1

This worked for me very well:

<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/primary"
    card_view:cardElevation="4dp"
    card_view:cardCornerRadius="0dp">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/primary"
        android:minHeight="?attr/actionBarSize" />

</android.support.v7.widget.CardView>