sheishuoAPP/app/res/drawable/white_edit_text_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="line">
            <stroke android:color="@color/white" android:width="0.5px"></stroke>
            <solid android:color="@color/white"></solid>
        </shape>
    </item>
</layer-list>