sheishuoAPP/uikit/res-ptr2/drawable-v21/btn_login_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="false">
        <shape android:shape="rectangle">
            <corners android:radius="5dp" />
            <solid android:color="@color/white" />
        </shape>
    </item>
    <item android:state_pressed="true" >
        <shape>
            <corners android:radius="5dp" />
            <solid android:width="3dp" android:color="@color/GreyWhite" />
        </shape>
    </item>
</selector>