Adding elevation (shadow) to ExtendedFloatingActionButton

Issue

I'm trying to add elevation (shadow) to a com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton and it just doesn't apply
I've tried so far adding:

app:elevation="8dp"
app:borderWidth="0dp"

Even on different order as someone mentioned it may make a difference
Removed the android:background and some other attributes just to see if it collides with the elevation but no luck.
The complete definition currently looks like this:

<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        android:id="@+id/save_reminder_fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        android:text="@string/save"
        android:textAllCaps="true"
        android:textColor="@color/white"
        android:paddingTop="10dp"
        android:paddingBottom="10dp"
        android:paddingStart="15dp"
        android:paddingLeft="15dp"
        android:paddingRight="20dp"
        android:paddingEnd="20dp"
        app:elevation="8dp"
        app:borderWidth="0dp"
        app:icon="@drawable/ic_check_white_18dp"
        app:backgroundTint="@color/colorPrimary"
        app:layout_anchorGravity="bottom|end" />

Solution

The attribute to set the elevation is app:elevation and the default value is 6dp

Use:

<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        app:elevation="8dp"

Check your material components library and use the latest stable version (currently 1.2.0).

Answered By - Gabriele Mariotti