Floating Action Button has no padding despite app:useCompatPadding="true"

Question

For the layout in one of my activities, I have a floating action button on the bottom right. But for some reason, there is no padding on the margins for the button despite setting app:useCompatPadding="true".

Here is the XML code:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/add_class_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:src="@drawable/ic_add_white_24dp"
        app:useCompatPadding="true" />

    <ListView
        android:id="@+id/android:list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></ListView>

</android.support.design.widget.CoordinatorLayout>

And here is an image of the layout:

Some help would be appriecated, thanks!

Answer 1

Try this

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <ListView
        android:id="@+id/android:list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <android.support.design.widget.FloatingActionButton
        android:layout_margin="16dp"
        android:id="@+id/add_class_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        app:useCompatPadding="true" />

</android.support.design.widget.CoordinatorLayout>