Source code
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:constantSize="true">
<item android:state_enabled="false" android:state_pressed="true">
<bitmap android:gravity="top|bottom|left|right|center_vertical|fill_vertical|center_horizontal|fill_horizontal|center|fill|start|end" android:src="@drawable/abc_scrubber_control_off_mtrl_alpha" />
</item>
<item android:state_enabled="false">
<bitmap android:gravity="top|bottom|left|right|center_vertical|fill_vertical|center_horizontal|fill_horizontal|center|fill|start|end" android:src="@drawable/abc_scrubber_control_off_mtrl_alpha" />
</item>
<item android:state_pressed="true">
<bitmap android:gravity="top|bottom|left|right|center_vertical|fill_vertical|center_horizontal|fill_horizontal|center|fill|start|end" android:src="@drawable/abc_scrubber_control_to_pressed_mtrl_005" />
</item>
<item>
<bitmap android:gravity="top|bottom|left|right|center_vertical|fill_vertical|center_horizontal|fill_horizontal|center|fill|start|end" android:src="@drawable/abc_scrubber_control_to_pressed_mtrl_000" />
</item>
</selector>