Lollipop MR1  |  5.1.0_r3
Xml文件  |  5行  |  184 B 

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/bottombar_unpressed" />
</layer-list>