Unbounded ripples which gracefully fallback to the default selector in pre-lollipop devices.

resources.xml

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

    <attr name="selectableItemBackgroundBorderlessCompat" />

</resources>

styles-v21.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Add your theme attributes here. -->
        <item name="selectableItemBackgroundBorderlessCompat">?attr/selectableItemBackgroundBorderless</item>
    </style>
  
</resources>

styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Add your theme attributes here. -->
        <item name="selectableItemBackgroundBorderlessCompat">?attr/selectableItemBackground</item>
    </style>
  
</resources>