sheishuoAPP/app/res/drawable/actionbar_blue_bg_pressed.xml

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item>
        <shape android:shape="rectangle" >

            <solid android:color="@color/color_blue_1081ea" />

        </shape>
    </item>
    <item android:bottom="2px">
        <shape android:shape="rectangle" >

            <solid android:color="@color/color_blue_1081ea" />

        </shape>
    </item>

</layer-list>