<EditText
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="@dimen/dp_40"
android:hint="请输入名称"
android:focusable="true"
android:focusableInTouchMode="true"
android:marqueeRepeatLimit="marquee_forever"
android:scrollHorizontally="true"
android:singleLine="true"
android:background="@drawable/edit_background"/>
2.在drawable文件夹下新建一个名为edit_background的xml，里面内容为：
<?xml version="1.0" encoding="utf-8"?>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid
android:color="#EFEFEF"/>
<corners
android:radius="3dip"
/>
<stroke
android:width="0.5px"
android:color="#505050"/>
</shape>
</item>
</layer-list>