<ToggleButton 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/toggle_me"/>

可绘制的东西就像：

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true"
        android:drawable="@drawable/toggle_me_on" /> <!-- checked -->
    <item android:drawable="@drawable/toggle_me_off" /> <!-- default/unchecked -->
</selector>