注意,不要写

<item android:drawable="@drawable/ic_setting_hud_obd_n" />

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item
    android:drawable="@drawable/ic_setting_hud_obd_n" android:state_checked="false"/>
    <item
    android:drawable="@drawable/ic_setting_hud_obd_p" android:state_checked="true"/>
</selector>